CN109354436B - Special glue material bag for pre-prepared mortar suitable for washing sea sand and preparation method thereof - Google Patents
Special glue material bag for pre-prepared mortar suitable for washing sea sand and preparation method thereof Download PDFInfo
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- CN109354436B CN109354436B CN201811349229.0A CN201811349229A CN109354436B CN 109354436 B CN109354436 B CN 109354436B CN 201811349229 A CN201811349229 A CN 201811349229A CN 109354436 B CN109354436 B CN 109354436B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a special glue material bag for pre-prepared mortar suitable for washing sea sand and a preparation method thereof, wherein the special glue material bag for pre-prepared mortar suitable for washing sea sand is prepared by mixing the following raw materials in parts by weight: 40-52 parts of cement clinker, 14-18 parts of coal cinder, 18-35 parts of limestone powder, 6-8 parts of slag powder, 2-4 parts of gypsum powder, 0.05-0.1 part of grinding aid, 0.05-0.1 part of fiber and 0.05-0.1 part of additive. The special glue material bag for the pre-prepared mortar suitable for the washed sea sand can solve the problems of cracking, hollowing, sagging, poor construction performance and the like caused by unstable sand source quality and unscientific proportioning, can accurately match the attribute characteristics of the washed sea sand, saves the stirring time, improves the construction efficiency and saves the cost. The invention also relates to a preparation method of the rubber material bag.
Description
Technical Field
The invention relates to a glue material bag and a preparation method thereof, in particular to a glue material bag special for pre-prepared mortar suitable for washing sea sand and a preparation method thereof.
Background
The mortar on the market is mainly divided into on-site stirring mortar and ready-mixed mortar. The two kinds of mortar have the problems in the popularization and use processes.
The field mortar stirring mainly has the following problems:
the mortar is lack of scientific formula, the material metering is not strict, the proportioning fluctuation is large, the stirring is carried out by experience, the quality of raw materials such as cement and sand is unstable, the mixing equipment and the mixing mode are backward, the production process is lack of monitoring and the like, and the quality stability and the construction performance of the mortar finished product are poor.
Secondly, materials are stacked in the open air, the occupied area is large, and dust and sand dust can not be controlled, so that the construction environment is poor; and the quantity of on-site stirring is difficult to control, so that waste is easily caused, and the construction of a conservation-oriented society is not facilitated.
Compared with the field stirring mortar, the quality and performance of the ready-mixed mortar are greatly improved. The ready-mixed mortar refers to wet-mixed mortar or dry-mixed mortar produced by professional production plants, and the common ready-mixed mortar mainly refers to masonry, plastering, ground or waterproof mortar. Compared with the traditional field mortar mixing, a series of processes such as raw material purchasing, transportation and processing, laboratory proportioning color measurement, field stirring quality control and the like can be omitted, and mechanical spraying can be adopted, so that the transportation cost of a construction party is effectively reduced, and the work efficiency is improved. For example, Chinese CN105753384B discloses a mortar base material, which comprises 100 parts by weight of cement, 120 parts by weight of quartz sand, 0.3-0.4 part by weight of water reducing agent, 0.1-0.15 part by weight of defoaming agent and 30-50 parts by weight of water. However, the substrate already contains quartz sand and still needs to be stirred on site, which is very heavy and difficult to transport and expensive to distribute. In addition, the opening time of the base material after premixing is short, construction must be carried out as soon as possible after mixing, otherwise the initial working performance of the mortar is lost, and secondary mixing is needed in the using process. Chinese CN108569876A discloses a high-performance premixed mortar ingredient, which comprises 30-40 parts of ordinary portland cement, 5-10 parts of fly ash cement, 5-10 parts of high-alumina cement, 20-30 parts of aggregate, 1-5 parts of admixture, 1-5 parts of water reducing agent and 1-5 parts of modifier; the aggregate is fine sand or quartz sand with continuous gradation, the grain diameter is not more than 5mm, the mud content is not more than 1.5wt, the water reducing agent is a polycarboxylic acid water reducing agent, and the modifier is SBR modified emulsified asphalt or SBS modified emulsified asphalt. The product can solve the hollowing phenomenon, has good corrosion resistance and water resistance, but has the problems of higher product price and higher delivery cost, difficult control of delivery quantity, easy occurrence of waste and the like.
In addition, sea sand and river sand belong to natural sand bodies, but have respective characteristics. In recent years, due to the rapid development of large-scale economic construction and coastal economic development areas, the construction scale of China is rapidly enlarged, so that the demand of building sand is increased rapidly, river sand is in serious shortage, and the search of other sand sources for replacing river sand becomes urgent. China has abundant sea sand resources, but the sea sand is used as building sand and is a double-edged sword, on one hand, the situation of shortage of river sand resources can be relieved by using the sea sand, and the ecological environment problem caused by excessive exploitation of the river sand is avoided, and on the other hand, the sea sand contains high-content chloride ions, so that serious reinforcement corrosion is caused by improper use of the sea sand, and the durability of a concrete structure is reduced sharply. Meanwhile, related researches also prove that the sea sand has smaller cohesive force with cement slurry and poorer rupture strength than river sand due to round particles, the sea sand has poorer firmness than the river sand, and the sea sand has lower compressive strength than the river sand. In view of this, the conventional materials for preparing mortar by mixing with river sand cannot be directly applied to sea sand, otherwise the strength of the solidified body may be insufficient and the construction requirements may not be met, and the existing mortar formula glue material needs to be improved according to the characteristics of the sea sand.
The invention aims to overcome the defects of the prior art and provides a special glue material bag for pre-mixed mortar, which is accurately matched with washed sea sand and is used for being matched with the sea sand and uniformly stirred to prepare the pre-mixed mortar.
Disclosure of Invention
< object of the invention >
The invention aims to provide a special glue material bag for pre-mixed mortar, which is accurately matched with washed sea sand, and is used for being matched with the sea sand and uniformly stirred to prepare pre-mixed mortar, so that the problems of cracking, hollowing, sagging, poor construction performance and the like caused by unstable sand source quality and unscientific proportioning are solved, and the attribute characteristics of the washed sea sand can be accurately matched.
< main aspects of the invention >
The invention relates to a special glue material bag for pre-prepared mortar suitable for washing sea sand, which comprises the following components:
40-52 parts of cement clinker, 14-18 parts of coal cinder, 18-35 parts of limestone powder, 6-8 parts of slag powder, 2-4 parts of gypsum powder, 0.05-0.1 part of grinding aid, 0.05-0.1 part of fiber and 0.05-0.1 part of additive.
According to a preferred embodiment of the invention, the admixture comprises hydroxypropyl methyl cellulose and an air entraining agent, wherein the hydroxypropyl methyl cellulose and the air entraining agent are mixed according to a weight ratio of 80-85: 15-18.
As a preferred embodiment of the present invention, the air-entraining agent is an alkylbenzene sulfonate type air-entraining agent.
In a preferred embodiment of the present invention, the hydroxypropylmethylcellulose has a viscosity of 40000 to 100000 mpa.s.
In a preferred embodiment of the invention, the fiber is one or more of rice husk, saw dust or bamboo leaves impregnated with silica sol, and the length of the fiber is 100-200 micrometers.
The invention also provides a method for preparing the special glue material bag for the pre-prepared mortar suitable for washing sea sand, which comprises the following steps:
the method comprises the steps of adopting the existing grinding system and homogenizing equipment, feeding materials according to the formula proportion of claim 1, feeding the materials except fibers and additives into the grinding system, grinding and homogenizing to obtain solid powder, mounting a batching scale at the tail of a mill, adding the fibers and the additives, homogenizing for 2-5 min by the homogenizing equipment to obtain powder with the fineness of 0.080mm and the sieve residue of a square-hole sieve of less than 10%, and subpackaging.
The specific surface area of the obtained powder is about 300m2/kg。
As a preferred embodiment of the method, the admixture comprises hydroxypropyl methyl cellulose and an air entraining agent, and the hydroxypropyl methyl cellulose and the air entraining agent are mixed according to the weight ratio of 80-85: 15-18.
As a preferred embodiment of the process according to the invention, the air-entraining agent is an alkylbenzene sulfonate type air-entraining agent.
In a preferred embodiment of the method of the present invention, the hydroxypropylmethylcellulose has a viscosity of 40000 to 100000 mpa.s.
As a preferred embodiment of the process of the invention, the ball milling parameters are: the ball material ratio is 10-15: 1, the rotating speed is 15-20 r/min during ball milling, and the ball milling time is 20-30 min.
In a preferred embodiment of the method of the present invention, the fiber is one or more of rice husk, sawdust or bamboo leaves impregnated with silica sol, and the impregnation is performed according to the following conditions:
mixing ethyl orthosilicate, ethanol and water according to a certain molar ratio, adding dilute hydrochloric acid as a catalyst, stirring at room temperature to prepare transparent silica sol, soaking rice hulls, sawdust or bamboo leaves by using the silica sol, adding 800-1300 ml of the silica sol into every 100g of the rice hulls, the sawdust or the bamboo leaves, maintaining the pressure for 2-4min under negative pressure, then removing the negative pressure, washing and drying to obtain the silica sol modified wood fibers, wherein the length of the fibers is about 100-200 microns.
The rice hulls, sawdust or bamboo leaves are soaked by silica sol, the structure of the rice hulls, sawdust or bamboo leaves is changed, the performance of wood fibers is improved, and the problems of poor size stability, easy decay, flammability and the like of the wood fibers are solved. The rice hulls, sawdust or bamboo leaves and the like belong to low-quality wood fibers and are generally treated as wastes, but because the raw material particles are small, the raw material particles can be directly soaked in silica sol for modification treatment without mechanical grinding or crushing treatment, so that the fiber components applicable to the special mortar glue material bag are obtained, and the production cost of the special mortar glue material bag is reduced from two aspects.
< technical effects of the invention >
(1) The special glue material bag for the pre-prepared mortar comprises cement clinker, coal cinder, limestone powder, slag powder, gypsum powder, a grinding aid, fibers and an additive in a reasonable ratio. The addition of the fibers improves the anti-sliding performance of the mortar prepared from the glue material and the washed sea sand to a certain extent, thereby promoting the construction performance of the mortar, improving the bonding strength between the mortar and a concrete slab, inhibiting the phenomena of cracking, deformation and the like of the solidified mortar at the initial stage, and improving the water retention rate of the solidified mortar so as to inhibit the cracking phenomenon caused by too fast drying and shrinkage of the mortar; on the other hand, the fiber can obviously improve the physical and mechanical properties of the hardened mortar test block, so that the flexural strength of the mortar is obviously increased. The three-dimensional net structure of the mortar is more compact due to the fiber impregnated by the silicon dioxide, so that the fatigue resistance of the mortar can be improved, and the sensitivity to temperature can be reduced. The additive is specially prepared aiming at the washed sea sand, the introduction of the additive can play roles of plasticization, water retention, slow setting and the like, the opening time of the mortar obtained after the additive is uniformly mixed with the sea sand reaches more than 18h, so that the ready-mixed mortar can achieve the purpose of not hardening, namely hardening after use, the workability and the later-stage mechanical property of the mortar are good, the workability of the mortar after 24h meets the construction requirement, the water retention rate is improved, the 14d tensile bonding strength of the mortar meets the standard requirement, and the mortar has good bonding capability.
(2) The fiber used in the method is a fiber subjected to silica sol impregnation treatment, and has flame retardant and other effects. The rice hull and the saw dust are low in cost and easy to obtain, and the comprehensive cost of the product can be further reduced.
(3) The special glue material bag for the pre-prepared mortar suitable for the washed sea sand is scientific and stable in formula, so that the finished mortar product is good in quality stability. The invention also uses solid wastes such as slag powder, coal slag and the like, comprehensively utilizes the solid wastes, accords with the current policy call of environmental protection, energy conservation and emission reduction, saves the using amount of cement clinker or gypsum powder and reduces the product cost.
(4) The special glue material bag for the pre-prepared mortar is specially used for the attribute characteristics of the washed sea sand, a scientific standard scheme is customized to match with the continuous-grade washed sea sand, the problems of cracking, hollowing, sagging, poor construction performance and the like caused by unstable sand source quality and unscientific proportioning can be well solved, the characteristics of the washed sea sand can be accurately matched, the stirring time is saved, the construction efficiency is improved, and the cost is saved.
(5) The preparation process of the special glue material bag for the pre-prepared mortar uses the existing production line and production equipment, the equipment only uses the ball mill and the homogenizing equipment, and the production line is not required to be additionally designed and purchased aiming at the product of the invention, thereby saving a large amount of cost for enterprises.
Detailed Description
The present invention is described in further detail below to enable those skilled in the art to practice the invention with reference to the description.
The special glue material bag for the pre-prepared mortar suitable for the washed sea sand is prepared by mixing, ball-milling and homogenizing the following raw materials in parts by weight:
40-52 parts of cement clinker, 14-18 parts of coal cinder, 18-35 parts of limestone powder, 6-8 parts of slag powder, 2-4 parts of gypsum powder, 0.05-0.1 part of grinding aid, 0.05-0.1 part of fiber and 0.05-0.1 part of additive.
The cement clinker is a semi-finished product which is prepared by using limestone, clay and iron raw materials as main raw materials, preparing raw materials according to a proper proportion, burning until part or all of the raw materials are molten, and cooling. The coal slag is industrial solid waste, is waste slag discharged by coal burning of thermal power plants, industrial and civil boilers and other equipment, and is also called slag. The main components are silicon dioxide, aluminum oxide, ferric oxide, calcium oxide, magnesium oxide and the like. According to different components, the method can be used for manufacturing cement, bricks, refractory materials and the like. Some of them can be used for preparing aluminium oxide or extracting rare metals of gallium and germanium, etc.
LimeThe limestone is a powdery material which is prepared by grinding limestone with a certain grade and purity into specified fineness. In concrete, a certain proportion of the concrete is mixed to be used as a cementing material. The main component of the gypsum powder is CaSO4.2H2O is often a mechanical mixture of clay, organic matter, etc. Limestone powder is an important gel material and can replace clay.
The fiber is added into the mortar, and has the main functions of endowing the mortar with certain toughness, improving the anti-cracking performance of the mortar and inhibiting the generation of early cracks of the mortar, and mainly has the following functions: (1) and (3) crack resistance, which prevents the propagation of original defects in the mortar matrix and effectively delays the occurrence of cracks. (2) And (4) seepage prevention, namely improving the compactness of the mortar matrix and preventing external moisture from entering. (3) Durability, improves the frost resistance, fatigue resistance and other performances of the mortar matrix, and improves the durability of the mortar matrix. (4) Impact resistance: the deformation resistance of the mortar matrix is improved, so that the toughness and the impact resistance of the mortar matrix are improved. (5) Tensile strength: the use of fibers may serve to increase the tensile strength of the matrix. (6) The toughness is high: the mortar fiber has higher toughness and strength.
The hydroxypropyl methyl cellulose in the additive can be used as a water-retaining agent, a retarder and an adhesive of the mortar, so that the mortar has pumpability, the smearing property is improved, and the operable time is prolonged. The water retention property of HPMC prevents the slurry from cracking caused by drying too fast after being coated, and enhances the strength after hardening. The air entraining agent in the admixture can introduce a large amount of uniformly distributed, stable and closed micro bubbles in the process of stirring the concrete, can improve the workability, water retention and cohesiveness of the concrete mixture, and can improve the fluidity of the concrete. The air entraining agent also reduces the thermal diffusion and the conductivity coefficient of the concrete, improves the volume stability of the concrete, enhances the weather resistance of a field structure and prolongs the service life.
The slag powder, namely granulated blast furnace slag powder, is a high-quality concrete admixture, and is prepared by drying and grinding granulated blast furnace slag meeting the GB/T203 standard to obtain powder with considerable fineness and meeting a considerable activity index. The density, specific surface area, activity index, fluidity ratio, water content, sulfur trioxide content, chloride ion content and ignition loss of the catalyst are shown in the following table:
grinding aids are additives that increase grinding efficiency. Typically surface active substances, have the effect of reducing the specific surface energy and "wedging" the particle fractures. In the application, the grinding aid is a powder grinding aid, and the powder grinding aid is generally produced by using triethanolamine (grinding aid), industrial salt (causing chloride ions to exceed the standard), mirabilite and anhydrous sodium sulphate (easy to crystallize) as carriers, and uniformly mixing the carrier and the anhydrous sodium sulphate.
In order to make the technical effects of the present invention more clear, the following description is made with reference to specific examples:
example 1
The embodiment relates to a method for preparing a special glue material bag for pre-prepared mortar suitable for washing sea sand, which comprises the following steps:
5.2kg of cement clinker, 1.4kg of coal cinder, 1.8kg of limestone powder, 0.8kg of slag powder, 0.2kg of gypsum powder and 0.01kg of grinding aid are sent into a ball mill together for ball milling and mixing by using a milling system and a homogenizing device which adopt the existing cement plant or milling station. The ball material ratio is 15: 1, the rotating speed is 20r/min during ball milling, and the ball milling time is 20 min. A batching scale is arranged on the discharge side of the ball mill, and 0.01kg of additive and 0.008kg of fiber are added. Wherein the grinding aid is an Weifang Zhongbo HB-102 cement grinding aid, and the additive is prepared by uniformly mixing hydroxypropyl methyl cellulose and an alkylbenzene sulfonate air entraining agent according to the mass ratio of 85: 15. And homogenizing the material added with the admixture for 2min by using a homogenizing device to obtain powder with the specific surface area of about 300 square meters per kg and the fineness of 0.080mm, wherein the sieve residue of the square-hole sieve is less than 10%. Finally, the powder is subpackaged, packed and delivered out of the factory.
Example 2
The embodiment relates to a method for preparing a special glue material bag for pre-prepared mortar suitable for washing sea sand, which comprises the following steps:
4.0kg of cement clinker, 1.8kg of coal cinder, 3.5kg of limestone powder, 0.6kg of slag powder, 0.4kg of gypsum powder and 0.01kg of grinding aid are sent into a ball mill together for ball milling and mixing by using a milling system and a homogenizing device which adopt the existing cement plant or milling station. The ball material ratio is 20: 1, the rotating speed is 15r/min during ball milling, and the ball milling time is 30 min. A material mixing scale is arranged on the discharge side of the ball mill, and 0.01kg of additive and 0.01kg of fiber are added. Wherein the grinding aid is an Weifang Zhongbo HB-102 cement grinding aid, and the additive is prepared by uniformly mixing hydroxypropyl methyl cellulose and an alkylbenzene sulfonate air entraining agent according to the mass ratio of 80: 18. And homogenizing the material added with the admixture for 2min by using a homogenizing device to obtain powder with the specific surface area of about 300 square meters per kg and the fineness of 0.080mm, wherein the sieve residue of the square-hole sieve is less than 10%. Finally, the powder is subpackaged, packed and delivered out of the factory.
Example 3
The embodiment relates to a method for preparing a special glue material bag for pre-prepared mortar suitable for washing sea sand, which comprises the following steps:
4.6kg of cement clinker, 1.5kg of coal cinder, 2.2kg of limestone powder, 0.7kg of slag powder, 0.3kg of gypsum powder and 0.01kg of grinding aid are sent into a ball mill together for ball milling and mixing by using a grinding system and a homogenizing device which adopt the existing cement plant or grinding station. The ball material ratio is 15: 1, the rotating speed is 20r/min during ball milling, and the ball milling time is 25 min. A batching scale is arranged on the discharge side of the ball mill, and 0.01kg of additive and 0.005kg of fiber are added. Wherein the grinding aid is an Weifang Zhongbo HB-102 cement grinding aid, and the additive is prepared by uniformly mixing hydroxypropyl methyl cellulose and an alkylbenzene sulfonate air entraining agent according to the mass ratio of 84: 16. And homogenizing the material added with the admixture for 2min by using a homogenizing device to obtain powder with the specific surface area of about 300 square meters per kg and the fineness of 0.080mm, wherein the sieve residue of the square-hole sieve is less than 10%. Finally, the powder is subpackaged, packed and delivered out of the factory.
Performance testing
The special glue material bag for the pre-prepared mortar in the embodiment 1-3 and the washed sea sand are mixed according to the weight ratio of 1: 5, mixing and stirring, adding a proper amount of water, mixing and stirring to prepare the M5 plastering mortar. The mortar was measured to have a volume weight of 1816kg/m, respectively3、1800kg/m3、1792kg/m3The consistency is about 90mm, after the curing under the standard condition, the compressive strength of 7d is 3.7MPa, 3.6MPa and 3.4MPa, and the compressive strength of 28d is 7.5MPa, 6.8MPa and 6.7 MPa. After the glass is put on the wall,no cracking, hollowing, sagging and other phenomena. The concrete test method refers to the building mortar basic performance test method standard (JGJ/T70).
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of adaptation of the invention, and further modifications may be readily effected by those skilled in the art, so that the invention is not limited to the specific details and examples shown and described herein, without departing from the general concept defined by the claims and the scope of equivalents.
Claims (10)
1. A special glue material bag for pre-prepared mortar suitable for washing sea sand is characterized by comprising
40-52 parts of cement clinker, 14-18 parts of coal cinder, 18-35 parts of limestone powder, 6-8 parts of slag powder, 2-4 parts of gypsum powder, 0.05-0.1 part of grinding aid, 0.05-0.1 part of fiber and 0.05-0.1 part of additive; the admixture comprises hydroxypropyl methyl cellulose and an air entraining agent; the fiber is one or more of rice hull, sawdust or bamboo leaves soaked by silica sol.
2. The special glue material bag for the prepared mortar suitable for washing sea sand as claimed in claim 1, wherein the hydroxypropyl methyl cellulose and the air entraining agent are mixed according to a weight ratio of 80-85: 15-18.
3. The special glue material bag for the prepared mortar suitable for washing sea sand of claim 1, wherein the air-entraining agent is an alkylbenzene sulfonate air-entraining agent.
4. The special glue material bag for the prepared mortar suitable for washing sea sand as claimed in claim 1, wherein the viscosity of the hydroxypropyl methyl cellulose is 40000-100000 mPa.s.
5. The special glue material package for the pre-prepared mortar suitable for washing sea sand as claimed in claim 1, wherein the length of the fiber is 100-200 μm.
6. A method for preparing a special glue material bag for pre-prepared mortar suitable for washing sea sand is characterized by comprising the following steps:
the method comprises the steps of adopting the existing grinding system and homogenizing equipment, feeding materials according to the formula proportion of claim 1, except fibers and additives, into the grinding system, grinding and homogenizing to obtain solid powder, installing a batching scale at the tail of a mill, adding the fibers and the additives, homogenizing for 2-5 min through the homogenizing equipment to obtain powder with the fineness of 0.080mm and the sieve residue of a square-hole sieve less than 10%, and subpackaging into packages.
7. The method according to claim 6, wherein the admixture comprises hydroxypropyl methyl cellulose and an air entraining agent, and the hydroxypropyl methyl cellulose and the air entraining agent are mixed according to a weight ratio of 80-85: 15-18.
8. The method for preparing the special glue material bag for the pre-prepared mortar suitable for washing sea sand according to claim 7, wherein the air-entraining agent is an alkylbenzene sulfonate air-entraining agent, and the viscosity of the hydroxypropyl methyl cellulose is 40000-100000 mPa.s.
9. The method for preparing the special glue material bag for the pre-prepared mortar suitable for washing sea sand according to claim 6, wherein the ball milling parameters are as follows: the ball material ratio is 10-15: 1, the rotating speed is 15-20 r/min during ball milling, and the ball milling time is 20-30 min.
10. The method for preparing the special glue material bag for the pre-prepared mortar suitable for washing sea sand as claimed in claim 6, wherein the fiber is one or more of rice husk, sawdust or bamboo leaves impregnated with silica sol, and the impregnation is performed according to the following conditions:
mixing ethyl orthosilicate, ethanol and water according to a certain molar ratio, adding dilute hydrochloric acid as a catalyst, stirring at room temperature to prepare transparent silica sol, soaking rice hulls, sawdust or bamboo leaves by using the silica sol, adding 800-1300 ml of the silica sol into every 100g of the rice hulls, the sawdust or the bamboo leaves, maintaining the pressure for 2-4min under negative pressure, then removing the negative pressure, washing and drying to obtain the silica sol modified wood fibers, wherein the length of the fibers is 100-200 microns.
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| CN201811349229.0A CN109354436B (en) | 2018-11-14 | 2018-11-14 | Special glue material bag for pre-prepared mortar suitable for washing sea sand and preparation method thereof |
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| WO2009098692A1 (en) * | 2008-02-06 | 2009-08-13 | Imi Tami Institute For Research And Development Ltd. | Additives for altering the hardening rate of chemically bonded silico-phosphate cements and method therefor |
| CN101525222A (en) * | 2009-03-11 | 2009-09-09 | 徐州工程学院 | High-performance marine sand concrete material |
| CN105541236A (en) * | 2016-02-04 | 2016-05-04 | 中国建筑材料科学研究总院 | Seawater-sea sand concrete |
| CN106587873A (en) * | 2016-11-21 | 2017-04-26 | 同济大学 | Self-leveling mortar mixed with desalted sea sand |
-
2018
- 2018-11-14 CN CN201811349229.0A patent/CN109354436B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009098692A1 (en) * | 2008-02-06 | 2009-08-13 | Imi Tami Institute For Research And Development Ltd. | Additives for altering the hardening rate of chemically bonded silico-phosphate cements and method therefor |
| CN101525222A (en) * | 2009-03-11 | 2009-09-09 | 徐州工程学院 | High-performance marine sand concrete material |
| CN105541236A (en) * | 2016-02-04 | 2016-05-04 | 中国建筑材料科学研究总院 | Seawater-sea sand concrete |
| CN106587873A (en) * | 2016-11-21 | 2017-04-26 | 同济大学 | Self-leveling mortar mixed with desalted sea sand |
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