KR200355191Y1 - Construction products by using construction wastes and synthetic resin - Google Patents

Abstract

The present invention relates to construction materials using construction waste and synthetic resin. The present invention is 20 to 70 parts by weight of synthetic resin; 40 to 60 parts by weight of recycled sand produced from construction waste and having a particle diameter of 6 mm or less; Centrifugally molding a polymer concrete composition comprising 0.5 to 3.5 parts by weight of a curing agent and 0.1 to 0.3 parts by weight of a curing accelerator, and provides a construction building material in which the hollow portion 120 is formed in the longitudinal direction of the main body 100. Accordingly, the present invention is excellent in physical properties such as strength, corrosion resistance, impact resistance and resistance to freezing and thawing, and has a high recyclability of construction waste and economic efficiency. Construction material of the present invention includes a road boundary block, interlocking block and the like.

Description

CONSTRUCTION PRODUCTS BY USING CONSTRUCTION WASTES AND SYNTHETIC RESIN}

The present invention relates to construction materials such as boundary blocks, interlocking blocks, bricks, etc. More specifically, the construction waste and synthetic resin as the main material, recycled sand and inorganic sludge produced in the process of construction waste and their binders The present invention relates to a construction material that is suitable for mixing synthetic resins used for molding and molding using centrifugal force, which is excellent in strength, corrosion resistance, impact resistance and resistance to freezing and thawing, and improves the recycling degree of construction waste and economical efficiency.

In general, the boundary block has a rectangular shape, and is mainly installed at the edge of the roadway (between the road and the sidewalk) and is installed as a purpose of the boundary or a means for preventing departure of the vehicle, and the interlocking block has an engagement structure. It is mainly used for floor finishing of sidewalks. Conventionally, construction materials such as bricks, including such boundary blocks and interlocking blocks, are generally cement concrete products and natural stone products. Such construction construction materials should be strong in corrosion resistance, resistance to freeze-thawing because they are always exposed to the outside as well as tensile, bending and compressive strength against external pressure. In particular, repeated freeze-thawing has a direct effect on durability, which leads to a decrease in strength and a deterioration in appearance, leading to frequent replacements, which in turn leads to economic loss, and above all, high resistance to freeze-thawing is required. .

However, cement concrete products are made by curing mortar mixed with aggregate (sand and gravel), cement (mainly forcant cement), water, and blast furnace slag and fly ash as a mixed material, which is easily corroded and weak in strength. Aging due to high absorption rate and neutralization by carbonic acid gas in the air occur. In addition, there is a problem in that the resistance to freezing and thawing is weak and easily cracked and broken. On the other hand, natural stone products are mainly cut and processed granite, which is superior in strength, corrosion resistance, and appearance compared to cement concrete products, but due to high material cost and processing cost, the product cost is very high and heavy. Problems with workability have been pointed out.

Accordingly, in recent years, many studies on polymer concrete have been attempted as relatively new materials. Generally, polymer concrete is based on aggregates (sand, gravel), polymers (synthetic resins), fillers, and hardeners and hardeners.

In this case, the polymer and the filler serve as a binder (binder) to bond the aggregate particles to each other. The curing agent and curing accelerator are determined according to the use of the product and the characteristics and type of the resin. In the polymer concrete as described above, in consideration of the miscibility of the polymer and the aggregate and the physical properties of the product, the type of polymer and its blending ratio are set as important factors.

Korean Patent Laid-Open No. 10-1997-065466 discloses 10-16% by weight of an unsaturated polyester resin binder containing 10-20% by weight of the shrinkage reducing agent, 60-80% by weight of a mixture of coarse aggregate and fine aggregate, A boundary block using a polymer concrete composition consisting of 8-16% by weight of filler and 0.1-0.16% by weight of initiator and crosslinking agent is shown. In addition, Korean Patent No. 10-1997-026995 discloses a sandwich insulation panel using a polymer concrete composition made as described above. And the Republic of Korea Patent Publication No. 10-2003-0056282 No. 55-65% by weight aggregates, 25-35% by weight of sand, resins that occupy 5-15% by weight as a binder (hardener in polyester resin) And a mixture of a curing accelerator) is provided.

Due to the properties of the polymer itself, such polymer concrete can increase the strength as well as surface (appearance), watertightness and corrosion resistance compared to cement concrete products.

However, the polymer concrete should be considered economically by minimizing the mixing ratio in the state that the physical properties (strength, water tightness, corrosion resistance, etc.) are guaranteed due to the high cost of the polymer itself, and the dimensional stability due to shrinkage during curing should be guaranteed. . However, in the prior art as described above, although the amount of the polymer to be mixed is less than the aggregate, although the polymer itself is very expensive, the production cost per unit volume is 5 to 8 times higher than that of conventional cement concrete products. There is this.

Therefore, polymer concrete is disadvantageous in terms of desirable materials and economics in terms of physical properties of the product, so some means must be taken to solve it.

Meanwhile, as environmental awareness is emerging as a global problem in recent years, efforts to protect the environment are increasing in Korea. Environmental issues are scattered throughout the society, including air and water quality, and the interest in construction waste is increasing. The disposal of construction waste is becoming increasingly difficult due to environmental and other issues, and development plans are being put on hold because there is no place to reclaim the remnants of the redevelopment building. Construction wastes are mostly inorganic wastes compared to other wastes, and recycled sands can be obtained through a relatively simple intermediate treatment process, especially in the case of recycled sands produced from waste concrete. It can be a beneficial material for solving environmental problems.

At present, many techniques for producing recycled sand and inorganic sludge from construction waste have been proposed, and a large amount is actually produced. However, these recycling methods are not specified, and most of them are landfilled, or when applied to some products, it is difficult to recycle due to deterioration in quality and lack of recognition between users and builders.

Conventionally, in recycling the recycled sand produced from construction waste, in the composition of general cement concrete, it is replaced with recycled sand instead of natural aggregate (river sand and gravel) to commercialize it. However, this has a problem that the strength and absorption rate is lower than the cement concrete product, the quality of the product does not appear uniformly. The reason for this is that the construction wastes generated at construction sites vary in the amount of foreign substances according to their properties, and the types and properties of aggregates, unit cement content, mixed materials, and their contents depending on the construction time, location, and purpose of the building. This is because it can vary according to variables such as usage, and it is not possible to set a standard for a specific value, and it is not possible to produce quantitative materials even after several steps such as sorting and crushing in the production process of recycled sand.

In particular, recycled sand contains foreign substances such as iron and water, and products using the same have a lot of voids in the product, so that strength, corrosion resistance, and resistance to freezing and thawing have been limited to be used as the main material of the product.

Accordingly, the recycled sand is not easily recycled as the main material of the product, and is thus landfilled while paying the cost with the waste concrete as the raw material. In addition, the inorganic sludge obtained as a by-product from the production of recycled sand may be used for fill or cover, but this is also landfilled at a cost.

Therefore, there is a need for a method to usefully recycle not only recycled sand produced from construction waste, but also inorganic sludge produced as a by-product thereof, and in the case of a product using the same, a technical task to have excellent physical properties to be practically used. do. In addition, when using a polymer (synthetic resin) as a binder, the cost aspect equivalent to existing cement concrete products should be considered.

The present inventors were able to obtain a building material having properties more than conventional cement concrete products by using a polymer (synthetic resin) as a binder in recycled sand.

The present invention solves the problems and problems of the prior art as described above, the construction waste and synthetic resin as the main material, a certain part by weight of the synthetic resin as a binder to a certain weight of recycled sand produced during the treatment of construction waste By molding this by centrifugal force, it has excellent physical properties such as strength, water-tightness, corrosion resistance and resistance to freeze-thawing, dimensional stability, and provides construction construction materials that can increase the recyclability and economical efficiency of construction wastes. Has its purpose.

In addition, the present invention has another object to increase the degree of recycling of inorganic sludge by using the inorganic sludge obtained as a by-product in the production of recycled sand.

In addition, the present invention is another object to provide a construction construction material that can improve the physical properties and surface properties and significantly shorten the manufacturing time by using a centrifugal mold supplied with heat in manufacturing the construction construction materials as described above have.

In addition, the present invention has another object to provide a construction material that is excellent in appearance and distinguishing power by containing color pigments or light-emitting pigments, which can be particularly useful in the outer road.

1 is a post-treatment process diagram for producing recycled sand and inorganic sludge from construction waste.

Figure 2 is a perspective view showing a rectangular boundary block installed on the edge of the roadway as a specific embodiment of the construction construction material according to the present invention.

Figure 3 shows another embodiment of the construction building material according to the present invention, a perspective view of a part of the cutting block having a coupling means at both ends.

Figure 4 shows a cross-sectional configuration of the centrifugal force manufacturing equipment that can be usefully applied to the production according to the present invention.

Figure 5 shows a perspective configuration diagram of the manufacturing mold constituting the centrifugal force manufacturing equipment of FIG.

FIG. 6 is a perspective configuration diagram of a centrifugal force production facility in which a plurality of production dies are installed as a preferred embodiment of FIG. 4.

Explanation of symbols on the main parts of the drawings

1: Manufacturing mold 2: Driving roller

3: heating means 4: transfer means

11: fixed frame 12: cover frame

13: driven wheel 31: capsule

32: heating element 100: main body

120: hollow 150: coupling means

150a: fitting protrusion 150b: fitting groove

In order to achieve the above object, the present invention is a construction building material using a polymer concrete composition,

20 to 70 parts by weight of synthetic resin; 40 to 60 parts by weight of recycled sand produced from construction waste and having a particle diameter of 6 mm or less (those having passed 6 mm of scale); Centrifugally molding a polymer concrete composition comprising 0.5 to 3.5 parts by weight of a curing agent and 0.1 to 0.3 parts by weight of a curing accelerator, and provides a construction building material having a hollow portion in the longitudinal direction of the main body.

The polymer concrete composition may optionally further comprise 15 to 35 parts by weight of inorganic sludge obtained as a by-product in the production of recycled sand, wherein the content of the synthetic resin is preferably 20 to 35 parts by weight.

In addition, according to the present invention, the polymer concrete composition may be made to further contain 0.5 to 5 parts by weight of color pigments, or 8 to 20 parts by weight of light emitting pigments based on 100 parts by weight of synthetic resin. And 5 to 10 parts by weight of one or more reinforcing materials selected from glass fibers and rubber powder may be further contained to increase bending performance and impact resistance.

Construction construction materials of the present invention as above,

Synthetic resins; Recycled sand produced from construction waste and having a particle diameter of 6 mm or less (passed 6 mm of scale); Obtaining a polymer concrete composition comprising a curing agent and a curing accelerator;

Injecting the polymer concrete composition into a centrifugal mold;

A first rotation step of rotating the centrifugal mold at a rotational speed of 200 to 400 rpm for 5 to 10 minutes so that the polymer concrete composition has an appearance form of a product and a hollow portion 120 is formed therein;

Supplying heat while the centrifugal mold is rotating;

It is preferably manufactured by a manufacturing method comprising a; a second rotation step of completely rotating the heat-treated centrifugal mold 10 minutes to 30 minutes at a rotation speed of 300 ~ 500rpm to completely cure the polymer concrete composition.

In addition, in the step of obtaining the polymer concrete composition, it is preferable to further include an inorganic sludge obtained as a by-product in the production of recycled sand. In addition, it is preferable to apply a release agent to the inner wall surface of the centrifugal mold so that releasability is good before introducing the polymer concrete composition into the centrifugal mold.

In addition, after the secondary rotation step, demolding and removing the cured contents (product) through the transfer means installed in the lower portion of the centrifugal mold; may be further included.

Hereinafter, the present invention will be described in more detail.

The inventors first examined the recycling method of recycled sand produced during the treatment of construction waste, and reviewed the construction materials that can be recycled. In addition, it was examined whether inorganic sludge obtained as a byproduct in the production of recycled sand could be used in place of blast furnace slag or fly ash, which has been used as a mixed material in existing cement concrete.

According to the present invention, when recycled sand produced from construction waste is recycled as the main material of construction materials, when synthetic resin is used as a binder thereof, the porosity is reduced and the bonding force is improved, the physical properties are excellent, and foreign substances contained in the raw materials of construction waste. It was found that the quality of the product was almost uniform regardless of the content, the type and property of aggregate at the time of pouring, the amount of unit cement, the mixed materials and the amount of use thereof. In addition, it was found that the inorganic sludge obtained as a byproduct in the production of recycled sand can be used as a filler by filling voids between the recycled sand particles to improve physical properties as well as reducing the amount of synthetic resin required. In particular, construction wastes and synthetic resins must be properly blended to have superior physical properties compared to existing cement concrete products, and it was found to be economically inferior. In addition, the present inventors devised a manufacturing method for manufacturing construction materials using construction waste and synthetic resin as main materials, and improving the physical properties and surface properties by increasing the degree of sealing. In this case, in particular, while the strength and watertightness of the product is sufficiently secured, a method of excellent dimensional stability and significantly reducing work time was completed.

First, the construction construction materials according to the present invention will be described in detail.

The construction material of the present invention is manufactured from a polymer concrete composition, and the polymer concrete composition includes 20 to 70 parts by weight of synthetic resin, 0.5 to 3.5 parts by weight of curing agent and 0.1 to 0.3 parts by weight of curing accelerator based on 40 to 60 parts by weight of recycled sand. It is done by

Preferably, inorganic sludge obtained as a byproduct in the production of recycled sand is further included. At this time, in the composition of the polymer concrete composition, the content of the synthetic resin is 20 to 35 parts by weight, the content of the inorganic sludge is 15 to 35 parts by weight. Specifically, when the inorganic sludge is contained, the polymer concrete composition may contain 20 to 35 parts by weight of synthetic resin, 15 to 35 parts by weight of inorganic sludge, 0.5 to 3.5 parts by weight of curing agent and 0.1 to 0.1 to 40 parts by weight of recycled sand. It comprises -0.3 parts by weight.

The recycled sand has a particle diameter of 6 mm or less (those having passed 6 mm of scale) produced from construction waste (waste concrete, waste stone, etc.), and includes waste concrete powder and stone powder having a predetermined particle size or more. Preferably, it is produced in the process of treating waste concrete among construction wastes, and has a particle size distribution having a particle size of 0.08 to 6 mm (diameter 6 mm passes but does not pass 0.08 mm) from which fine powder is removed. More preferably, as having a particle size distribution of 0.08 to 3 mm, one having a granulation ratio of 2.5 to 3.2 is used. At this time, when the granulation rate is less than 2.5, the sealing degree is not preferable. That is, when the granulation rate is less than 2.5, the porosity is large between particles, which is not preferable in view of physical properties such as strength and water absorption (watertightness). Such recycled sand contains 40 to 60 parts by weight based on the weight of the polymer concrete composition, and recycled sand is preferably economically contained as much as possible, but when it exceeds 60 parts by weight, it is contained as a synthetic resin and filler included as a binder. It is difficult to obtain the desired physical properties in the present invention because the content of the inorganic sludge becomes relatively small.

The inorganic sludge is a result of agglomeration of the fine powder obtained as a by-product during the production of recycled sand. Specifically, the inorganic sludge is the result of the agglomeration of the fine powder having a particle diameter of less than 0.08 mm (those having passed through 0.08 mm). It acts as a filler to fill the voids between the recycled sand particles and contains 15 to 35 parts by weight with respect to 40 to 60 parts by weight of recycled sand.

At this time, less than 15 parts by weight is difficult to fill enough voids between the recycled sand particles, the physical properties are weak, and if it exceeds 35 parts by weight, the viscosity is increased, the moldability is lowered, and the strength is greater than the required filling amount between the recycled sand particles Degrades.

Therefore, the recycled sand and inorganic sludge used in the present invention are the result produced from construction waste. Such recycled sand and inorganic sludge are currently obtained in various ways. In particular, the present inventors have proposed a method for producing a crushed sand using construction waste in the Republic of Korea Patent Publication No. 10-2002-0050185 with respect to recycled sand. The recycled sand that can be used in the present invention includes the crushed sand (recycled sand) obtained by the method shown in the above-mentioned patent publication proposed by the inventor.

For example, a process for obtaining recycled sand and inorganic sludge from construction waste may be carried out in a pretreatment process and a post-treatment process. First, the pretreatment process is performed to recover recovered construction wastes (waste concrete, waste stone, etc.). After crushing with Jaw Crusher, remove iron and earth and sand, remove foreign substances such as dust, synthetic resin, cloth, paper, etc. from the underwater sorting device, and then shred again and pass through the screen to make particle size less than 50mm. For example, 40 mm to 50 mm recycled aggregates are screened.

Next, a post treatment process is performed, which will be described with reference to FIG. 1. 1 shows a post-treatment process diagram of construction waste. Referring to FIG. 1, in the post-treatment process, recycled sand and inorganic sludge having a particle diameter of 6 mm or less are obtained, and recycled aggregates of 50 mm or less selected in the pretreatment process are introduced into a jaw crusher and then crushed. After proceeding, the secondary crushing step is carried out by continuously entering into the cone crusher (Cone Crusher). Then, the first vibration classification is performed in a wet manner by being transferred to the screen. In the first vibration classification, less than 6 mm of recycled sand is sorted and collected in a sand unit, and particles larger than 6 mm are transferred to the second crushing step again. In addition, the first vibration classification may be progressed and then the second vibration classification may proceed, where recycling sand of 3 mm or less is sorted and collected in a sand unit. In addition, the particles larger than 3mm in the secondary vibration classification is injected into the impact crusher (impact crusher) is subjected to the crushing / polishing step and then the second vibration classification proceeds again. In this process, the fine powder having a particle diameter of less than 0.08 mm is removed, either in the first and second vibration classification processes, or collected in a sand unit and then passed through a screen having a 0.08 mm scale. As a result, recycled sand having a particle size distribution of 0.08 to 6 mm, preferably a particle size distribution of 0.08 to 3 mm is obtained. And recycled sand through the above process has a distribution ratio of 2.8 ~ 2.9.

In addition, the fine powder having a particle diameter of less than 0.08 mm obtained as a by-product in the process of obtaining the recycled sand is inorganic sludge. Specifically, with reference to FIG. 1, fine powder having a particle diameter of less than 0.08 mm is added to a thickener tank, and the chemical tank I receives the coagulant (polyacrylamide, aluminum sulfate, etc.), and the water is supplied from the chemical tank II. Flocculation and water treatment. And then divided into finely divided storage tank I and finely divided storage tank II and temporarily stored, and then transferred to the filter when the state of cake of water content of 8% is discharged to the outside to obtain inorganic sludge.

Recycled sand and inorganic sludge obtained through the treatment process as described above is preferably used after drying sufficiently to be compatible with the synthetic resin.

The synthetic resin acts as a binder, and in particular, forms a matrix with the inorganic sludge to bond the recycled sand particles to each other. In the present invention, the synthetic resin may use a virgin resin (a resin that has never been used) and a recycled resin (waste resin; a waste synthetic resin) and a virgin resin (a resin that has never been used). Include. Specifically, one or two or more selected from unsaturated polyester resins, polyurethanes, low density polyethylene, epoxy resins, acrylic resins, phenol resins, and the like may be used, and preferably the viscosity is 200 to 500 cps (at 25 ° C). A liquid unsaturated polyester resin, more preferably an ortho type unsaturated polyester resin is used. Unsaturated polyester resins are preferred over other resins in terms of strength, chemical properties and cost. And, considering the price, it is possible to use a pellet-type recycled resin that is currently inexpensive on the market.

Synthetic resin as described above contains 20 to 70 parts by weight based on 40 to 60 parts by weight of recycled sand according to the present invention. At this time, when contained in less than 20 parts by weight, it is difficult to obtain the properties such as strength and watertightness of the present invention because the bonding strength is weak, and when it exceeds 70 parts by weight, the physical properties are excellent but the price is high and workability is poor. And when the inorganic sludge is included, the preferred amount of synthetic resin is 20 to 35 parts by weight.

The curing agent and curing accelerator are selected according to the type of synthetic resin used. For example, when unsaturated polyester resin is used as the synthetic resin, the curing agent is methyl ethyl ketone peroxide (MEKPO: Methyl) having good compatibility with the unsaturated polyester resin. It is preferable to use a peroxide system such as Ethyl Ketone Peroxide) or benzoyl peroxide (BOP: Benzoil Peroxide), and a cobalt system such as cobalt octoate (Cobalt Octoate) is preferably used as a curing accelerator.

In addition, the polymer concrete composition may be made to further contain a color pigment and / or a light-emitting pigment that emits light according to the present invention. Here, the color pigments may be used inorganic or organic type used in the general industrial field, and contains 0.5 to 5 parts by weight based on 40 to 60 parts by weight of recycled sand. At this time, when the content is less than 0.5 parts by weight, the degree of color expression is reduced, the effect is insignificant, and when it exceeds 5 parts by weight, there is no further effect and is not preferable in terms of price.

The light emitting pigment may be a sulfur compound-based, such as ZnS-based, CdS-based, or an oxide-based, such as strontium-based, alumina-based, and the like as LLP-A, LLP-B, LLP-C, LLP-D and the like can be used. These luminescent pigments are first blended with synthetic resins to obtain luminescent master batches and then mixed with other recycled sand and inorganic sludge, which are formulated to contain 8 to 20 parts by weight relative to 100 parts by weight of synthetic resin. That is, synthetic resin: luminescent pigment = 1: 0.08 ~ 0.2) At this time, if less than 8 parts by weight of light emission brightness is low, the effect is insignificant, if it exceeds 20 parts by weight, the strength of the product as the powder particles increase It is not preferable because it becomes weak, does not exhibit a higher luminous performance, and increases in price.

Color pigments and luminous pigments as described above improves the appearance of the product, in particular, luminous pigments improve the driver's safety by having a discriminating power when applied to the boundary block for the outer road.

In addition, the polymer concrete composition may contain 5 to 10 parts by weight of one or more reinforcing materials selected from glass fibers and rubber powder based on 40 to 60 parts by weight of recycled sand. The glass fiber may be used having a length of 10 ~ 12mm, the rubber powder is a recycled product pulverized waste tire is preferably used having a particle diameter of 0.5mm or less (those passing through a 0.5 division). Such a reinforcement increases the strength of the product, and especially when applied as a boundary block, the impact resistance is improved is preferable.

The construction building material according to the present invention is prepared by curing the polymer concrete composition as described above by using a centrifugal force. When the centrifugal force is used in this way, the degree of closedness between the particles is increased, the physical properties are improved, and the external appearance is formed in the same way as the shape of the centrifugal mold, thereby having dimensional stability. Preferably, it is preferable to be manufactured by the manufacturing method described below, and more preferably, as illustrated in FIG. 2, the hollow part 120 may be formed in the longitudinal direction of the main body 100.

The construction material according to the present invention is manufactured by centrifugal molding of a polymer concrete composition composed of synthetic resin, recycled sand, inorganic sludge, hardener, and hardening accelerator as above. Construction finishing materials such as interlocking blocks installed in the interlocking structure on the floor, panels attached to the walls of the building, and floorings formed on the floor of the underground parking lot to form the floor, bricks for building walls, and fume pipes forming the drainage channels A form of drain pipe.

Figure 2 is a perspective view showing a rectangular boundary block installed on the edge of the roadway as a specific embodiment of the construction construction material according to the present invention.

As shown in FIG. 2, it is preferable that the hollow part 120 penetrated in the longitudinal direction of the main body 100 is formed when the product is applied as a boundary block. The hollow part 120 not only increases the bending stiffness but also saves the molding material and imparts lightness. And it can be applied to electric wire piping, drainage, and the like.

On the other hand, the construction building material according to the present invention including the boundary block illustrated in Figure 2 can be mutually coupled with the adjacent product when installed in the construction site, wherein a separate coupling member is used, or the product itself is a synthetic resin As used, it can be bonded by a resin adhesive. For example, the coupling member may be a coupling member in the form of a pipe when the construction material of the present invention is a drain pipe such as a fume pipe. In addition, the resin adhesive may be a synthetic resin having an adhesive force, for example, silicone, epoxy resin, polyurethane and the like can be used. In addition, the bonding member and the resin adhesive can be used at the same time to achieve a more robust bonding.

In addition, it is preferable that the construction building material according to the present invention has a coupling means to improve the bonding force between the products. Figure 3 shows another embodiment of the boundary block, showing a state having a coupling means 150 at both ends. The coupling means 150 may be a stepped structure, an engagement structure or a fitting structure, and may be composed of a fitting protrusion 150a formed at one end and a fitting groove 150b formed at the other end as illustrated in FIG. 3. have. At this time, by applying a resin adhesive to the fitting groove (150b) and then insert the fitting protrusion (150a) combined to achieve a more firm coupling.

Hereinafter, as a preferable manufacturing method of the construction building materials as described above, according to the present invention will be described a manufacturing method that can increase the physical properties and surface properties, have a dimensional stability and can significantly shorten the manufacturing time.

Construction building materials according to the present invention,

(a) synthetic resin; Recycled sand produced from construction waste and having a particle diameter of 6 mm or less (passed 6 mm of scale); Obtaining a polymer concrete composition comprising a curing agent and a curing accelerator (Step 1);

(b) injecting the polymer concrete composition into a centrifugal mold (Step 2);

(c) a first rotation step of rotating the centrifugal mold at a rotational speed of 200 to 400 rpm for 5 to 10 minutes so that the polymer concrete composition has the form of a product and a hollow portion 120 is formed therein (Step 3). );

(d) supplying heat to the centrifugal mold while the centrifugal mold is rotating (Step 4); And

(e) the second centrifugal rotation step (Step 5) to further harden the polymer concrete composition by further rotating the centrifugal mold supplied with heat for 10 minutes to 30 minutes at a rotational speed of 300 to 500 rpm. It is preferred to be prepared.

In addition, in the step of obtaining the polymer concrete composition (Step 1) containing 20 to 70 parts by weight of synthetic resin, 0.5 to 3.5 parts by weight of curing agent and 0.1 to 0.3 parts by weight of curing accelerator based on 40 to 60 parts by weight of recycled sand It is desirable to. At this time, it is more preferable to optionally contain an inorganic sludge further, wherein the synthetic resin is 20 to 35 parts by weight, the inorganic sludge is composed of 15 to 35 parts by weight. In addition, the light-emitting pigment 8 to 20 parts by weight based on 0.5 to 5 parts by weight of the color pigment and / or 100 parts by weight of the synthetic resin may be further contained. And 5 to 10 parts by weight of one or more reinforcing materials selected from glass fibers and rubber powder. (Step 1) The synthetic resin includes a liquid synthetic resin and a solid pellet-shaped synthetic resin (preferably a pellet-type recycled resin). .

The centrifugal mold is a centrifugal rotation by receiving the driving force, it is preferable to apply a release agent to facilitate the demoulding of the construction building material on the inner wall surface before the polymer concrete composition is injected. The release agent may be a liquid or gel wax, silicone or the like. At this time, the inner wall surface of the centrifugal mold is more preferably plated with hard chromium. This has the advantage of further improving the releasability. In putting the polymer concrete composition into the centrifugal mold as described above, the input amount may be equal to the volume of the centrifugal mold, but preferably less than the volume of the centrifugal mold so that the hollow portion 120 is formed in the product. do. At this time, the size of the hollow portion 120 is set according to the input amount. Preferably, in terms of weight and strength of the product, the dosage of the polymer concrete composition to the volume of the centrifugal mold is 50 to 70% by volume. That is, 50 to 30% by volume of empty space remains in the centrifugal mold after the polymer concrete composition is injected. (Step 2)

After the polymer concrete composition is added, the centrifugal mold is rotated at a rotational speed of 200 to 400 rpm. Preferably it is rotated at 300 rpm. At this time, the rotational speed of the centrifugal mold acts as an important factor affecting the shape of the product, the degree of closeness and surface properties, but at a speed lower than 200rpm, the hollow portion 120 is not in good shape and the degree of closedness drops and the strength and Water tightness is weakened, and if it is larger than 400rpm, material separation occurs, resulting in poor surface properties and poor strength. And if the rotation for 5 to 10 minutes at the same rotation speed as described above, the polymer concrete composition is in the form of the product (Step 3), that is, the appearance of the product is the same as the shape of the centrifugal mold, the inside of the product The hollow part 120 having a shape is formed.

Subsequently, heat is supplied to the centrifugal mold while the centrifugal mold is rotating as described above (Step 4). At this time, when a liquid synthetic resin is used, the internal temperature of the centrifugal mold is maintained at 60 to 80 ° C, and the solid phase is If pellet type synthetic resin is used, adjust the temperature according to the type of resin, but keep the meltable temperature at the beginning and then gradually lower the temperature to maintain it at 60 ~ 80 ℃. That is, when liquid synthetic resin is used, the temperature of 60 to 80 ° C. is maintained from the beginning, and when solid pellet-type synthetic resin is used, it is initially melted by applying a high temperature and then maintained at a temperature of 60 to 80 ° C. Allow to cure. And, in the temperature range, that is, 60 ~ 80 ℃ to further rotate at a rotational speed of 300 ~ 500rpm (Step 5) Preferably it is rotated at a speed of 400rpm. If it is maintained at 60 ~ 80 ℃ in this way, the curing time of the polymer concrete composition can be shortened, and the curing time is completely cured in about 10 minutes to 30 minutes, although there is a slight difference depending on the dosage.

The temperature outside the above temperature range is not preferable because the curing time is long or hardening due to melt decomposition of the synthetic resin.

In the first rotation step (Step 3), the heat should not be supplied to the centrifugal mold, for the purpose of obtaining the shape of the product. That is, when heat is supplied in the first rotation step (Step 3), there is a problem in that the shape of the product is hardened because the shape of the product is not yet prepared. Therefore, the first rotation step (Step 3) is a step to take the form of the product, the subsequent heat supply (Step 4) and the second rotation step (Step 5) is a step of completely curing the product. In addition, it is preferable that the rotation speed of the second rotation step (Step 5) is greater than the first rotation step (Step 3). Strength is improved.

In addition, after the step (Step 5) it is preferable to further comprise the step of removing the cured contents (product) through the transfer means installed in the lower portion of the centrifugal mold.

According to the manufacturing method of the present invention as described above, it can increase the physical properties and surface properties and can significantly shorten the manufacturing time. That is, the closedness is increased by the centrifugal force, and the physical properties and surface properties are increased, and the hardening time is significantly shortened to 30 minutes or less as heat is supplied while the curing time is used more than 10 hours. In addition, the polymer concrete composition shrinks when hardened. When the centrifugal force is used as described above, even if shrinkage occurs in the process of curing the synthetic resin, the appearance of the product is maintained in the same shape as the centrifugal mold by the centrifugal force. The product has excellent dimensional stability because it is fully cured in the state. In addition, when water is contained in the polymer concrete composition, water is removed by the difference in specific gravity in the process of centrifugal rotation so that it is not involved in the properties of the product.

On the other hand, the manufacturing method as described above may be usefully applied centrifugal force manufacturing equipment described below. Figure 4 shows a cross-sectional configuration of the centrifugal force manufacturing equipment that can be applied to the production according to the present invention, Figure 5 shows a perspective configuration diagram of the manufacturing mold constituting the centrifugal force manufacturing equipment. 6 shows a manufacturing facility in which several manufacturing molds are installed. Such centrifugal force manufacturing facilities are shown in detail in the specification and drawings entitled "Hollow Polymer Boundary Block Manufacturing Apparatus" filed by the applicant.

First, referring to FIG. 4 and FIG. 5, the centrifugal force manufacturing equipment is described, which is a centrifugal force manufacturing mold 1, a heating means 3 for supplying heat to the manufacturing mold 1, and the manufacturing mold 1. It comprises a drive means (not shown) for providing a driving force to the conveying means, and a conveying means 4 for conveying the manufactured product to the outside.

The mold 1 is composed of a centrifugal mold composed of a stationary mold 11 and a lid 12 as shown in FIG. 5, and two drive rollers 2 supporting the centrifugal mold. In the centrifugal mold, a driven wheel 13 is installed, and the driven wheel 13 is seated on the driving roller 2. At this time, two or more centrifugal molds may be installed. In this case, when two or more centrifugal molds are installed, each centrifugal mold is partitioned by the driven wheels 13. 6 shows a manufacturing facility in which six manufacturing molds having four centrifugal molds are installed. In this way, if a plurality of centrifugal molds and production molds 1 are installed, many products can be manufactured through a series of processes.

The driving force is transmitted to the manufacturing mold 1, the driving means for this may be an electric motor, which is connected to the drive roller 2 or the driven wheel 13 to rotate the centrifugal mold. At this time, the centrifugal mold is rotated at 200 ~ 400rpm. In addition, a mold release agent (wax, silicon, etc.) is applied to the inner wall of the centrifugal mold, and then a polymer concrete composition is added thereto. At this time, it is preferable that hard chromium is plated on the inner wall of the centrifugal mold, and the polymer concrete composition is centrifugal. 50 to 70% by volume of the mold is preferably added.

When the polymer concrete composition is introduced as above, heat is supplied from the heating means 3. As shown in FIG. 4, the heating means 3 covers a hemispherical tunnel capsule 31 installed to cover and open the manufacturing mold 1, and a plurality of heating elements 32 fixedly mounted inside the capsule 31. It is composed of At this time, the knife 31 is in a closed state while the equipment is in operation. The heating element 32 may be selected from a gas burner nozzle or an electric heater, which supplies heat to the capsule 31 so that the temperature inside the centrifugal mold may be maintained at 60 to 80 ° C. At this time, the tunnel type capsule 31 preferably has a heat insulating property as well as reflective properties to improve the heat supply efficiency. In one example, a reflector may be provided on the inner wall surface of the capsule 31 to have reflection characteristics. In addition, the heating means 3 is preferably configured to include a temperature cage, the heating element 32 is automatic temperature control so that the temperature inside the centrifugal mold can be kept constant in the range of 60 ~ 80 ℃ It is desirable that it is possible. The polymer concrete composition is completely cured by further rotating for 10 to 30 minutes at a rotational speed of 300 to 500 rpm while supplying heat to maintain the above temperature range.

The hardened contents (product) fall to the conveying means 4 installed in the lower end of the manufacturing mold (1). The conveying means 4 may use a conveyor belt driven by a motor, which conveys the manufactured product to the outside.

According to the centrifugal force manufacturing equipment as described above, the centrifugal force is used to increase the physical properties and surface properties of the product, as well as the heating means 3 and the transfer means 4 are installed to produce a large amount of products having dimensional stability within a short time. Can be. In particular, as shown in Figure 6 by installing a plurality of centrifugal mold and the production mold (1) in the equipment it is possible to improve the mass productivity.

Hereinafter, specific examples and comparative examples of the present invention.

[Examples 1-3]

<Recycled sand>

The product produced from the waste concrete was used for purchase, and as a result of evaluation of the physical properties, the assembly rate was 2.86, and the body scale passed all 5 mm. Physical property evaluation was based on KS F 2573-'99 and KS F 2576-'01. Evaluation results of physical properties such as granulation rate, particle size, water absorption rate, and the like of the recycled sand used in this experiment are shown in the following [Table 1].

<Property evaluation results of recycled sand> Test Items result Test Methods Particle size distribution % Of weight passing through sieve 10 mm 100 KS F 2573-'99 5 mm 100 2.5mm 87 1.2 mm 66 0.6mm 39 0.3mm 16 0.15mm 5 0.08mm 5.2 Assembly rate 2.86 Organic impurities Softer than standard solution Unit volume mass (kg / L) 1.50 Particle shape determination performance rate (%) 61.1 Density (g / cm 3)-dry state 2.24 Absorption rate (%) 6.74 Foreign substance content (%) 0.4 KS F 2576-'01

<Inorganic sludge>

The fine powder generated during the production of the recycled sand was used to agglomerate, and the components were analyzed according to KS L 5120-'99 (equipment analysis, ICP, AAS) and are shown in the following [Table 2]. The results were harmless across all items.

<Inorganic sludge component analysis results> ingredient Content (% by weight) Test Methods SiO ₂ 47.2 KS L 5120-'99 device analysis (I.C.P., A.A.S.) SO ₃ 0.84 Fe ₂ O ₃ 3.86 Al ₂ O ₃ 10.7 CaO 18.11 MgO 1.94 Na ₂ O 1.25 K ₂ O 2.35 TiO ₂ 0.11 P ₂ O ₅ 0.08 Heat loss 10.4

<Synthetic Resin, Curing Agent and Curing Accelerator>

As the synthetic resin, Korea's Cray Valley Korea Inc. used an ortho type unsaturated polyester liquid resin, but cobalt octoate was added as a curing accelerator. As a curing agent, a colorless solution in which 45% by weight of dimethylphthalate (DMP) was mixed with 55% by weight of methyl ethyl ketone (MEKPO) was used.

Recycled sand, inorganic sludge, synthetic resins, hardeners and curing accelerators as described above were mixed in the amounts shown in the following [Table 3] to obtain various polymer concrete compositions having different mixing ratios. And using the centrifugal force production equipment shown in each of the polymer concrete composition shown in Figure 4 and 5 to prepare a test piece having a hollow portion 120 therein.

In addition, the compressive strength, flexural strength and water absorption were measured for the test specimens according to each example and the results are shown in the following [Table 4]. At this time, the compressive strength was measured according to the method specified in KS F 2481, but the average value was measured three times and the flexural strength was measured according to the concrete boundary block bending test method defined in KS F 4006. Represented by value. Absorption rate was determined according to KS F 4006, but the difference between absorption weight and dry weight was divided by dry weight and expressed as a percentage.

[Comparative Examples 1 and 2]

In this test, steel sand was used instead of the recycled sand of the above example, and part or all of the inorganic sludge was replaced with blast furnace slag. The physical properties of the steel sand used were assembling rate 2.58, absorption rate 1.69%, performance rate 61.3%, and 0.08mm passage rate 1.52% by weight. The composition and content of the concrete composition prepared according to this test are shown in [Table 3]. And for the concrete composition according to the test using a centrifugal force manufacturing equipment as in the embodiment was prepared a test piece formed with a hollow portion 120, the physical properties were evaluated for this result is shown in the following [Table 4] .

Comparative Example 3

In the above embodiment was carried out by significantly reducing the content of synthetic resin. The composition and content of the concrete composition prepared according to this test are shown in [Table 3]. And for the concrete composition according to the test using a centrifugal force manufacturing equipment as in the embodiment was prepared a test piece formed with a hollow portion 120, the physical properties were evaluated for this result is shown in the following [Table 4] .

[Comparative Example 4]

Steel sand used in Comparative Example 1 was used, but concrete mortar was prepared according to a conventional cement concrete manufacturing method. The composition and content of the concrete composition prepared according to this test are shown in [Table 3]. Then, the concrete composition according to the test was put into a rectangular formwork and vibrated compacted, and then cured to prepare a test piece. The physical properties thereof were evaluated and the results are shown in the following [Table 4].

<Composition and Content of Concrete Composition> division Example 1 (kg) Example 2 (kg) Example 3 (kg) Comparative Example 1 (kg) Comparative Example 2 (kg) Comparative Example 3 (kg) Comparative Example 4 (kg) Synthetic resin 5.4 8.25 8.269 8.25 8.269 2.2 - Recycled sand 16.54 16.50 16.538 - - 23.27 - River sand - - - 16.50 16.50 - 28.5 Inorganic sludge 11.03 11.0 11.0 - 7.35 11.0 - Blast furnace slag - - - 11.0 3.65 - 8.2 Normal Falkland Cement - - - - - - 12.5 Hardener 0.33 0.83 0.248 0.83 0.248 0.15 - Curing accelerator 0.06 0.08 0.06 0.08 0.06 0.04 - water - - - - - - 16.5 Compounding amount 33.36 36.66 36.115 36.66 36.077 36.66 65.7 input 33.00 33.00 33.00 33.00 33.00 33.00 58.00

<Property Evaluation Results> division Compressive strength (kg / cm3) Flexural strength (kgf) Absorption rate (%) Size of specimen (width × length × length) Example 1 936.5 2700 0.32 15 cm x 20 cm x 150 cm Example 2 1057 3640 0.18 15 cm x 20 cm x 150 cm Example 3 1102 3670 0.19 15 cm x 20 cm x 150 cm Comparative Example 1 1082 3645 0.25 15 cm x 20 cm x 150 cm Comparative Example 2 1090 3682 0.21 15 cm x 20 cm x 150 cm Comparative Example 3 740 2115 2.5 15 cm x 20 cm x 150 cm Comparative Example 4 423 1145 4.6 15 cm x 20 cm x 150 cm

As can be seen from the above results, even when recycled sand and inorganic sludge are used (Example), synthetic resin is used as a binder, and it can be seen that it has excellent physical properties compared to existing cement products (Comparative Example 4). And from the results of Examples (1-3) and Comparative Examples (1-2) it can be seen that the recycled sand can replace the steel sand when used in combination with the synthetic resin, the inorganic sludge is admixture to existing cementum concrete It can be seen that replacement of blast furnace slag has been used. In addition, it can be seen from the results of Comparative Example 3 that the recycled sand remains largely different in strength as well as water absorption, depending on the content of the synthetic resin.

As described above, the present invention is a construction waste and synthetic resin as the main material, the recycled sand and inorganic sludge produced during the treatment of construction waste and the synthetic resin used as a combination thereof are appropriately blended and centrifugally molded to achieve strength and internal resistance. It has excellent physical properties such as impact, high recyclability of construction waste, and excellent dimensional stability and economic efficiency.

Specifically, the synthetic resin is superior in strength, corrosion resistance, impact resistance and the like than conventional cement concrete products, and the absorption rate is reduced, thereby improving the resistance to freeze-thawing. Such resistance to copper melting improves durability. In addition, the synthetic resin itself is recycled sand and inorganic sludge, which is supplied as a main material (received by cost), even though the price is high. This is uplifted. As the centrifugal molding is performed, the degree of closedness is increased, thereby improving physical properties and excellent dimensional stability.

In addition, when color pigments or luminous pigments are contained, the appearance and discriminating power are excellent, and in particular, when the luminous pigments are contained in the boundary block installed on the outer road, the driver's safety can be secured. In addition, since the boundary block has flexibility due to the characteristics of the synthetic resin itself used as the main material, it has a buffer against external impacts, thereby reducing damage in a vehicle accident. In addition, the construction material according to the present invention can be easily recycled. In other words, the synthetic resin used as the main material can be melted, so it can be re-molded into a new product to reduce the amount of construction waste.

On the other hand, in manufacturing the construction construction material according to the present invention, when the heat-driven centrifugal mold is used, the physical properties and surface properties are improved as well as excellent dimensional stability and significantly shorten the manufacturing time to improve the productivity Have

Claims (10)

In construction building materials using polymer concrete composition, 20 to 70 parts by weight of synthetic resin; 40 to 60 parts by weight of recycled sand produced from construction waste and having a particle diameter of 6 mm or less (those having passed 6 mm of scale); A centrifugally molded polymer concrete composition comprising 0.5 to 3.5 parts by weight of a curing agent and 0.1 to 0.3 parts by weight of a curing accelerator, wherein the hollow construction part 120 is formed in the longitudinal direction of the main body 100. The construction material according to claim 1, wherein the polymer concrete composition has 20 to 35 parts by weight of synthetic resin, and 15 to 35 parts by weight of inorganic sludge obtained as a by-product in the production of recycled sand. The construction building material according to claim 1, wherein the synthetic resin is one or two or more selected from unsaturated polyester resins, polyurethanes, low density polyethylene, epoxy resins, acrylic resins, phenol resins, and the like. The construction building material according to claim 1, wherein the synthetic resin is a pellet type recycled resin. The construction material according to claim 1, wherein the polymer concrete composition further comprises 0.5 to 5 parts by weight of color pigments. The building construction material according to claim 1, wherein the polymer concrete composition further comprises 8 to 20 parts by weight of a luminescent pigment based on 100 parts by weight of a synthetic resin. The building construction material according to claim 1, wherein the polymer concrete composition further comprises 5 to 10 parts by weight of at least one reinforcing material selected from glass fibers and rubber powder. The construction construction material according to claim 1, wherein the construction construction material is a road boundary block installed at an edge of a roadway. The construction construction material according to any one of claims 1 to 8, wherein the construction construction material has coupling means (150) on both sides thereof. The construction construction material according to claim 9, wherein the coupling means (150) is formed of a fitting protrusion (150a) formed at one end and a fitting groove (150b) formed at the other end.