CN115260776B - Modified asphalt, preparation method and application thereof, and pre-paved modified asphalt waterproof roll - Google Patents
Modified asphalt, preparation method and application thereof, and pre-paved modified asphalt waterproof roll Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B11/00—Layered products comprising a layer of bituminous or tarry substances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B11/00—Layered products comprising a layer of bituminous or tarry substances
- B32B11/12—Layered products comprising a layer of bituminous or tarry substances next to a particulate layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/665—Sheets or foils impervious to water and water vapor
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
- E04D5/10—Roof covering by making use of flexible material, e.g. supplied in roll form by making use of compounded or laminated materials, e.g. metal foils or plastic films coated with bitumen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
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Abstract
The invention belongs to the technical field of coiled materials, and particularly relates to modified asphalt, a preparation method and application thereof, and a pre-paved modified asphalt waterproof coiled material. The modified asphalt uses a modifier comprising at least one of thermoplastic phenolic resin and epoxy thermoplastic elastomer; the high-viscosity pre-paved modified asphalt waterproof coiled material is prepared from modified asphalt and/or porous mineral particles attached to the surface of the modified asphalt. According to the modified asphalt, the thermoplastic phenolic resin and/or the epoxy thermoplastic elastomer are used as the asphalt modifier, so that the viscosity of the modified asphalt is improved, and compared with the prior art, the waterproof coiled material prepared from the modified asphalt has better water channeling resistance and stripping resistance.
Description
Technical Field
The invention belongs to the technical field of coiled materials, and particularly relates to modified asphalt, a preparation method and application thereof, and a high-viscosity pre-paved modified asphalt waterproof coiled material.
Background
The pre-paving and anti-sticking technology is that the waterproof coiled material is laid on the base surface, and then the structural concrete is poured to make the concrete slurry and the coiled material adhesive film layerA tightly combined construction method. The method has the characteristics of convenience in construction, no need of protective layer and the like, and is mainly used for basement bottom plate construction. The upper surface of waterproofing membrane structure promptly with post-cast concrete bonding face be inorganic mineral material promptly, this material can act as coiled material surface anti-sticking layer, personnel's convenience of standing when avoiding construction operation can improve coiled material and post-cast concrete bonding strength again. There are also many studies on pre-laid waterproof rolls in the prior art, for example, chinese patent application CN111040652a discloses a polymer pre-laid waterproof roll comprising a polymer substrate layer, a pressure-sensitive adhesive layer on the polymer substrate layer, and a sand grain anti-sticking layer on the pressure-sensitive adhesive layer; the pressure-sensitive adhesive layer includes: 25-35 parts by mass of a styrene-isoprene-styrene block copolymer; 32-38 parts by mass of carbon five petroleum resin; 5-12 parts by mass of 145 pentaerythritol modified rosin resin; 25-32 parts by mass of naphthenic oil; 0.3 parts of antioxidant; 0.5 parts by mass of ultraviolet stabilizer; the softening point of the carbon five petroleum resin is 95-105 ℃, the color is less than No. 4, and the kinematic viscosity of naphthenic oil is 9-11mm at 100 DEG C 2 At 20 ℃ the density is 0.8950-0.9100g/cm 3 . The pressure-sensitive adhesive layer using this component has an adhesive effect with sintered sand. As disclosed in chinese patent application CN110938390a, a pre-laid polymer waterproof roll comprises a sheet polymer carrier, a hot-melt pressure-sensitive adhesive layer on the sheet polymer carrier, and a plurality of anti-adhesion particles on the hot-melt pressure-sensitive adhesive layer, wherein the particle size of the anti-adhesion particles is smaller than the thickness of the hot-melt pressure-sensitive adhesive layer, the surface of the anti-adhesion particles is wrapped with an organic layer, and the anti-adhesion particles are connected with the hot-melt pressure-sensitive adhesive layer through the organic layer; the organic layer comprises the following components: 100-160 parts by mass of a solvent; 50-80 parts by mass of polyurethane resin; 15-20 parts of pigment; 10-12 parts of filler; 0.3-1 parts by mass of a cross-linking agent; 0.5-1 parts by mass of an antioxidant; 1-2.5 parts by mass of an ultraviolet light resistant agent; 0.03-0.2 parts by mass of thickener.
However, the current coiled materials face the common problem that mineral particles on the surface of the coiled materials are not firmly bonded with modified asphalt and fall off when not constructed; mineral particles are bonded with concrete after construction and separated from modified asphalt, and the construction is carried out by adopting a pre-paving method, so that the bonding requirement on waterproof coiled materials and post-cast concrete is higher. In GB/T23457-2017, the stripping strength of coiled materials and post-cast concrete is required to be met in addition to the requirements of the pre-paved waterproof coiled materials, so that the condition that underground water leaks through gaps between the coiled materials and the post-cast concrete in the floor engineering is prevented. In the actual use process, the waterproof coiled materials with mineral particles coated on the surfaces including the modified asphalt waterproof coiled materials and post-cast concrete are not firmly bonded, and the mineral particles and the concrete form a whole and are separated from adhesive layers such as the modified asphalt to form a water channeling channel, so that the safety risk is increased.
Disclosure of Invention
In order to overcome the technical problems, the invention provides modified asphalt, a preparation method and application thereof, and a high-viscosity pre-paved modified asphalt waterproof roll, wherein the modified asphalt has higher viscosity, water channeling resistance and stripping performance, and the stripping resistance of the pre-paved modified asphalt waterproof roll prepared by using the modified asphalt is obviously improved, and meanwhile, the water channeling risk is reduced.
In order to achieve the above object, the technical scheme provided by the invention is as follows:
a modified asphalt, the modifier used in the modified asphalt comprises at least one of thermoplastic phenolic resin and epoxy thermoplastic elastomer.
Preferably, the structural formula of the thermoplastic phenolic resin is:
the thermoplastic phenolic resin contains a plurality of hydroxyl groups, and as mineral particles are mostly compounds containing Si, al, O, H, and contain a large amount of O elements, the introduction of the hydroxyl groups can form hydrogen bonds with O, so that the adhesive force between the modified asphalt and the porous mineral is improved.
Preferably, the model of the epoxy thermoplastic elastomer is ESBC6500, the epoxy thermoplastic elastomer is a novel thermoplastic elastomer containing strong polar functional groups, which is obtained by epoxidation of a styrene thermoplastic elastomer (SBC), and compared with the common SBC, the epoxy thermoplastic elastomer has the following chemical changes:
the thermoplastic elastomer contains epoxy polar groups, so that the polarity of the modified asphalt can be enhanced. Mineral particles are mainly SiO 2 、Al 2 O 3 The adhesive force of mineral particles on the surface of modified asphalt can be improved by improving the polarity of different conformational compounds.
Preferably, the modifier is used in an amount of 12-15% of the total mass of the modified asphalt.
In some preferred embodiments, the modified asphalt further comprises: matrix asphalt, softening oil, SBR, tackifying resin, stabilizers, and inorganic fillers.
Preferably, the stabilizer is a peroxy-based cross-linking agent.
Preferably, the inorganic filler is silicate with a particle size of 200-400 meshes.
In some preferred technical schemes, the modified asphalt comprises the following raw materials in parts by mass: 40-45 parts of matrix asphalt, 10-15 parts of softening oil, 8-12 parts of epoxy thermoplastic elastomer, 5-10 parts of SBR, 3-5 parts of thermoplastic phenolic resin, 4-8 parts of tackifying resin, 0.5-1.0 part of stabilizer and 5-35 parts of inorganic filler.
The invention also provides a preparation method of the modified asphalt, which comprises the following steps:
(1) Mixing and melting matrix asphalt and softening oil, adding SBR and epoxy thermoplastic elastomer, heating and stirring uniformly, and dissolving to obtain a mixed solution A;
(2) Heating the mixed solution A obtained in the step (1), adding thermoplastic phenolic resin, continuously stirring, and dissolving to obtain a mixed solution B;
(3) Cooling the mixed solution B obtained in the step (2), adding a stabilizing agent, continuously stirring, adding tackifying resin after dissolving, continuously stirring, and dissolving to obtain a mixed solution C;
(4) And (3) adding inorganic filler into the mixed solution C obtained in the step (3), and stirring and mixing uniformly to obtain the modified asphalt.
Preferably, in step (1), the melting heating temperature is 120-160 ℃; the temperature is raised to 160-180 ℃.
Preferably, the temperature in step (2) is raised to 180-190 ℃.
Preferably, in the step (3), the temperature is reduced to 160-170 ℃.
The invention also provides application of the modified asphalt in waterproof coiled materials.
The invention also provides a high-viscosity pre-paved modified asphalt waterproof roll, and particularly the high-viscosity pre-paved modified asphalt waterproof roll contains the modified asphalt.
Preferably, the upper surface of the modified asphalt is covered with porous mineral particles.
Further preferably, the porous mineral particles are at least one of diatomaceous earth, mullite, and expanded perlite.
Further preferably, the porous mineral particles have a particle size of 8-16 mesh and a porosity of 40-60%.
The invention also provides a method for preparing the high-viscosity pre-paved modified asphalt waterproof roll.
Specifically, the preparation method comprises the following steps:
s1, forming a modified asphalt layer on a reinforcing layer by utilizing the modified asphalt;
s2, covering porous mineral particles on the upper surface of the modified asphalt layer obtained in the step S1 to obtain a mineral particle layer;
and S3, applying pressure on the surface of the mineral particle layer obtained in the step S2 to enable the porous mineral particles and the modified asphalt to be mutually embedded, and thus the high-viscosity pre-laid modified asphalt waterproof coiled material is obtained.
Preferably, the thickness of the modified asphalt layer in the step S1 is more than or equal to 1.2mm.
Preferably, the covering conditions of the porous mineral particles in step S2 are: the modified asphalt has a temperature of 80-150deg.C, and the porous mineral particles are dispersed in an amount of 1.2-1.6kg/m 2 。
Preferably, the conditions under which the surface is pressurized in step S3 are: the temperature of the modified asphalt is 60-120 ℃, and the surface applied pressure is 3-5MPa.
The beneficial effects of the invention are as follows:
(1) According to the invention, the thermoplastic phenolic resin and/or the epoxy thermoplastic elastomer are used as the asphalt modifier, so that the viscosity of the modified asphalt is improved, and compared with the prior art, the waterproof coiled material prepared from the modified asphalt has better water channeling resistance and stripping resistance.
(2) On one hand, the high-viscosity pre-paved modified asphalt waterproof coiled material prepared by the modified asphalt adopts surface porous mineral particles as a covering material, so that the inner surface area of the mineral particles is increased, and the modified asphalt adhesive is embedded into the holes of the mineral particles to form physical anchor embedding; on the other hand, the cohesiveness between asphalt and mineral particles is improved by improving the asphalt, namely, the polarity of the sizing material is enhanced by introducing an epoxy type thermoplastic elastomer modifier with higher polarity into the modified asphalt, and the thermoplastic phenolic resin is added into the modified asphalt to provide more hydroxyl groups, so that the acting force of silica bonds in the modified asphalt and the mineral particles is increased, and the acting force of hydrogen bonds is formed, so that the asphalt and the mineral particles have higher cohesiveness, and the occurrence of water channeling can be effectively reduced.
(3) The preparation method is simple, convenient to construct and suitable for industrial popularization.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
Before the embodiments of the invention are explained in further detail, it is to be understood that the invention is not limited in its scope to the particular embodiments described below; it is also to be understood that the terminology used in the examples of the invention is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the invention.
Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The invention does not limit the sources of the adopted raw materials, and if no special description exists, the adopted raw materials are all common commercial products in the technical field. The raw materials used in the examples are shown in Table 1.
Table 1 raw material description
| Raw materials | Model or specification | Manufacturer' s |
| Matrix asphalt | 70# asphalt | Beijing-Bo petrochemical industry |
| Softening oil | Oil for building three wires | Jiangyin alpha |
| Epoxy thermoplastic elastomer | ESBC6500 | Ningbo borrelid |
| SBR | SBR1502E | Qilu petrochemical industry |
| Thermoplastic phenolic resin | Thermoplastic phenolic resin 2402 | Shenzhen Jitian chemical industry |
| Tackifying resin | C5 petroleum tackifying resin | Ningbo zhenhua |
| Stabilizing agent | Peroxy-based crosslinking agent | Strength of salt city |
| Inorganic filler | 200-400 mesh silicate | Anda mining industry |
Example 1
A high-viscosity pre-paved modified asphalt waterproof coiled material and a preparation method thereof comprise the following steps:
1. preparation of modified asphalt
1) Mixing 45 parts by mass of asphalt and 10 parts by mass of softening oil, slowly heating to 140 ℃, slowly adding 10 parts by mass of SBR and 8 parts by mass of epoxy thermoplastic elastomer into the mixture in a molten state, uniformly mixing, heating, and rapidly stirring or shearing at 170 ℃ until the mixture is completely dissolved;
2) Heating, adding 5 parts by mass of thermoplastic phenolic resin at 185 ℃, and continuously stirring until the thermoplastic phenolic resin is completely dissolved;
3) Cooling to 160-170 ℃, adding 1 part by mass of stabilizer, rapidly stirring, adding 4 parts by mass of tackifying resin after complete dissolution, and continuously stirring until complete dissolution;
4) At this temperature, 5 parts by mass of an inorganic filler was added, and stirring was continued until uniformly mixed for use.
2. Porous mineral particle adhesion
1) The modified asphalt is coated on a tire base reinforcing layer in a scraping way, and the thickness of the modified asphalt on the surface adhered with mineral particles is 1.4mm;
2) When the temperature of the modified asphalt is 90-100 ℃, porous sintered diatomite is selected along with traction of the modified asphalt, the particle size is 8-10 meshes, and the porosity is 40-45%. Uniformly scattering mineral particles on the surface of modified asphalt by a hopper, wherein the spreading amount is 1.5kg/m 2 ；
3) And (3) cooling, namely applying 3MPa pressure on the surfaces of the mineral particles by using a compression roller when the temperature is 60-70 ℃ so as to enable the mineral particles and the modified asphalt to be mutually embedded.
Example 2
The preparation of the high-viscosity pre-paved modified asphalt waterproof coiled material comprises the following steps:
1. preparation of modified asphalt
1) Mixing 40 parts by mass of 70# asphalt and 15 parts by mass of softening oil, slowly heating to 120 ℃, wherein the mixture is in a molten state, slowly adding 5 parts by mass of SBR and 12 parts by mass of epoxy thermoplastic elastomer, uniformly mixing, heating, and rapidly stirring or shearing at 160 ℃ until the mixture is completely dissolved;
2) Heating, adding 3 parts by mass of thermoplastic phenolic resin at 185 ℃, and continuously stirring until the thermoplastic phenolic resin is completely dissolved;
3) Cooling to 160-170 ℃, adding 0.5 part by mass of stabilizer, rapidly stirring, adding 8 parts by mass of tackifying resin after complete dissolution, and continuously stirring until complete dissolution;
4) At this temperature, 35 parts by mass of an inorganic filler was added, and stirring was continued until uniformly mixed for use.
2. Porous mineral particle adhesion
1) The modified asphalt is coated on a tire base reinforcing layer in a scraping way, and the thickness of the modified asphalt on the surface adhered with mineral particles is 1.3mm;
2) When the temperature of the modified asphalt is 110 ℃, porous sintered diatomite is selected along with traction of the modified asphalt, the particle size is 10-12 meshes, and the porosity is 40-45%. Uniformly scattering mineral particles on the modified material by a hopperAsphalt surface, spreading amount of 1.5kg/m 2 ；
3) And (3) cooling, and applying 3MPa pressure on the surfaces of the mineral particles by using a compression roller when the temperature is 80-90 ℃ so as to enable the mineral particles and the modified asphalt to be mutually embedded.
Example 3
The preparation of the high-viscosity pre-paved modified asphalt waterproof coiled material comprises the following steps:
1. preparation of modified asphalt
1) Mixing 42 parts by mass of 70# asphalt and 12 parts by mass of softening oil, slowly heating to 120-160 ℃, wherein the mixture is in a molten state, slowly adding 8 parts by mass of SBR and 10 parts by mass of epoxy thermoplastic elastomer, uniformly mixing, heating, and rapidly stirring or shearing at 160-180 ℃ until the mixture is completely dissolved;
2) Heating, adding 4 parts by mass of thermoplastic phenolic resin at 180-190 ℃, and continuously stirring until the thermoplastic phenolic resin is completely dissolved;
3) Cooling to 160-170 ℃, adding 0.6 part by mass of stabilizer, rapidly stirring, adding 5 parts by mass of tackifying resin after complete dissolution, and continuously stirring until complete dissolution;
4) At this temperature 16 parts by mass of inorganic filler are added and stirring is continued until the mixture is homogeneous for further use.
2. Porous mineral particle adhesion
1) The modified asphalt is coated on a tire base reinforcing layer in a scraping way, and the thickness of the modified asphalt on the surface adhered with mineral particles is 1.2mm;
2) When the temperature of the modified asphalt is 90-100 ℃, porous sintered diatomite is selected along with traction of the modified asphalt, the particle size is 14-16 meshes, and the porosity is 40-45%. Uniformly scattering mineral particles on the surface of modified asphalt by a hopper, wherein the spreading amount is 1.5kg/m 2 ；
3) And (3) cooling, and applying 3MPa pressure on the surfaces of the mineral particles by using a compression roller when the temperature is 70-80 ℃ so as to enable the mineral particles and the modified asphalt to be mutually embedded.
Comparative example 1
The comparative example differs from example 1 in that the epoxy type thermoplastic elastomer is replaced with Yuhuang SBS7301, wherein Yuhuang SBS7301 is of a linear type.
Comparative example 2
The comparative example differs from example 1 in that a swallowed SBS4402 was used instead of an epoxy thermoplastic elastomer, wherein the yu huang linear SBS4402 was of star type gauge.
Comparative example 3
This comparative example differs from example 2 in that the amount of the added thermoplastic phenolic resin was reduced to 1 part by mass.
Comparative example 4
This comparative example differs from example 2 in that the addition amount of the thermoplastic phenolic resin was increased to 8 parts by mass.
Comparative example 5
This comparative example differs from example 3 in that the porous mineral particles were changed to non-porous sintered shale, having a particle size of 14-16 mesh.
Comparative example 6
The comparative example is different from example 3 in that the porous mineral particles are changed to ordinary river sand, and the particle size is 60-80 mesh.
Performance test of waterproof coiled material
The testing method comprises the following steps: the mineral aggregate adhesion test refers to the GB/T328.17-2007B method, specifically: mineral pellet adhesion test procedure: and fixing the test piece on a brushing machine, brushing the surface of the waterproof coiled material test piece along the length direction of the test piece by using a brush with a stainless steel wire, and testing the quality of mineral particles on the surface after brushing.
The peeling strength with post-pouring concrete and the peeling strength after immersing the post-pouring concrete are referred to GB/T23457-2017; the method comprises the following steps: peel strength with post-cast concrete: and pouring the cement mortar on the surface of the test piece according to standard requirements, and curing to obtain the test piece to be tested. When in testing, a universal tensile machine is used, one end of the universal tensile machine clamps a test piece, the other end clamps a cement block, the bonding interface between the test piece and cement mortar is 180 degrees, and the tensile machine is started to enable the test piece to be peeled off on the surface of the cement mortar and record the peeling force value.
Peel strength after soaking with post-cast concrete: in the preparation process of the test sample, the coiled material is bonded with cement mortar and cured for 7d, then the test sample is immersed in water at 23+/-2 ℃ for 28 d+/-2 h, the surface moisture is taken out, and the peeling strength is tested according to the peeling strength test method with post-pouring concrete.
The test results are shown in tables 2-4.
Table 2 shows the performance index of the high-viscosity pre-laid modified asphalt waterproof coiled material prepared in examples 1-3
| Test item | Index (I) | Example 1 | Example 2 | Example 3 |
| Mineral pellet adhesion/g | ≤2 | 1.0 | 1.2 | 0.8 |
| Peel strength with post cast concrete/(N/mm) | ≥1.5 | 3.6 | 3.2 | 3.5 |
| Anti-channeling performance (Hydraulic gradient MPa) | ≥0.8 | 1.2 | 1.2 | 1.4 |
Therefore, the high-viscosity pre-paved modified asphalt waterproof coiled material provided by the invention has better peel strength and water channeling resistance.
TABLE 3 Performance index of high-viscosity pre-laid modified asphalt waterproof rolls prepared in example 1 and comparative examples 1-2
| Test item | Index (I) | Example 1 | Comparative example 1 | Comparative example 2 |
| Mineral pellet adhesion/g | ≤2 | 1.0 | 1.6 | 2.0 |
| Peel strength with post cast concrete/(N/mm) | ≥1.5 | 3.6 | 2.4 | 2.2 |
| Anti-channeling performance (Hydraulic gradient MPa) | ≥0.8 | 1.2 | 1.2 | 1.0 |
As is clear from comparative examples 1 and 2, the webs made with ordinary linear and star SBS instead of ESBC6500 were acceptable but had significantly lower peel strength.
TABLE 4 Performance index of high adhesion Pre-laid modified asphalt waterproof rolls of example 2 and comparative examples 3-4
| Test item | Index (I) | Example 2 | Comparative example 3 | Comparative example 4 |
| Mineral pellet adhesion/g | ≤2 | 1.2 | 2.1 | 2.4 |
| Peel strength with post cast concrete/(N/mm) | ≥1.5 | 3.2 | 2.0 | 1.8 |
| Anti-channeling Water (Hydraulic gradient) | ≥0.8MPa | 1.2 | 1.0 | 0.9 |
As is clear from comparative examples 3 and 4, as the amount of the thermoplastic phenolic resin added is changed, the adhesion between the asphalt and the mineral particles is improved to be poor, and the bonding strength with the post-cast concrete is remarkably poor.
TABLE 5 Performance index for example 3 and comparative examples 5-6
| Test item | Index (I) | Example 3 | Comparative example 5 | Comparative example 6 |
| Mineral pellet adhesion/g | ≤2 | 0.8 | 2.7 | 2.3 |
| Peel strength with post cast concrete/(N/mm) | ≥1.5 | 3.5 | 2.2 | 2.0 |
| Anti-channeling performance (Hydraulic gradient MPa) | ≥0.8 | 1.4 | 0.6 | 0.8 |
As is clear from comparative examples 5 and 6, the types of mineral particles in the invention have great influence on the water channeling resistance and the peeling strength, and the porous particles can effectively improve the peeling strength and the water channeling resistance of the waterproof coiled material.
The foregoing detailed description is directed to one of the possible embodiments of the present invention, which is not intended to limit the scope of the invention, but is to be accorded the full scope of all such equivalents and modifications so as not to depart from the scope of the invention.
Claims (10)
1. The modified asphalt is characterized by comprising the following raw materials in parts by weight: 40-45 parts of matrix asphalt, 10-15 parts of softening oil, 8-12 parts of epoxy thermoplastic elastomer, 5-10 parts of SBR, 3-5 parts of thermoplastic phenolic resin, 4-8 parts of tackifying resin, 0.5-1.0 part of stabilizer and 5-35 parts of inorganic filler;
the thermoplastic phenolic resin is thermoplastic phenolic resin 2402;
the model of the epoxy type thermoplastic elastomer is ESBC6500;
the stabilizer is a peroxy cross-linking agent;
the inorganic filler is silicate with the particle size of 200-400 meshes.
2. A method of preparing the modified asphalt of claim 1, comprising the steps of:
(1) Mixing and melting matrix asphalt and softening oil, adding SBR and epoxy thermoplastic elastomer, heating and stirring uniformly, and dissolving to obtain a mixed solution A;
(2) Heating the mixed solution A obtained in the step (1), adding thermoplastic phenolic resin, continuously stirring, and dissolving to obtain a mixed solution B;
(3) Cooling the mixed solution B obtained in the step (2), adding a stabilizing agent, continuously stirring, adding tackifying resin after dissolving, continuously stirring, and dissolving to obtain a mixed solution C;
(4) And (3) adding inorganic filler into the mixed solution C obtained in the step (3), and stirring and mixing uniformly to obtain the modified asphalt.
3. The method of claim 2, wherein in step (1), the melting heating temperature is 120-160 ℃; the temperature is raised to 160-180 ℃; the temperature is raised to 180-190 ℃ in the step (2); and (3) cooling to 160-170 ℃.
4. Use of the modified asphalt according to claim 1 or the modified asphalt prepared by the preparation method according to any one of claims 2 to 3 in a waterproof roll.
5. A high-viscosity pre-paved modified asphalt waterproof coiled material, which is characterized by comprising the modified asphalt of claim 1 or the modified asphalt prepared by the preparation method of the modified asphalt of any one of claims 2-3.
6. The high-viscosity pre-laid modified asphalt waterproof roll according to claim 5, wherein the modified asphalt has an upper surface covered with porous mineral particles.
7. The high-viscosity pre-laid modified asphalt waterproof roll according to claim 6, wherein the porous mineral particles are at least one of diatomaceous earth, mullite and expanded perlite.
8. The high-viscosity pre-laid modified asphalt waterproof roll according to claim 6, wherein the particle size of the porous mineral particles is 8-16 mesh, and the porosity is 40-60%.
9. A method for preparing the high-viscosity pre-laid modified asphalt waterproof coiled material according to any one of claims 5 to 8, which is characterized by comprising the following steps:
s1, forming a modified asphalt layer on a reinforcing layer by utilizing the modified asphalt;
s2, covering porous mineral particles on the upper surface of the modified asphalt layer obtained in the step S1 to obtain a mineral particle layer;
and S3, applying pressure on the surface of the mineral particle layer obtained in the step S2 to enable the porous mineral particles and the modified asphalt to be mutually embedded, and thus the high-viscosity pre-laid modified asphalt waterproof coiled material is obtained.
10. The method according to claim 9, wherein the thickness of the modified asphalt layer in step S1 is 1.2mm or more; the covering conditions of the porous mineral particles in step S2 are: the modified asphalt has a temperature of 80-150deg.C, and the porous mineral particles have a spreading amount of 1.2-1.6kg/m 2 The method comprises the steps of carrying out a first treatment on the surface of the The conditions for applying pressure to the surface in step S3 are: the temperature of the modified asphalt is 60-120 ℃, and the surface applied pressure is 3-5MPa.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01240595A (en) * | 1988-03-18 | 1989-09-26 | Nkk Corp | Production of modified pitch |
| CN107603519A (en) * | 2017-09-12 | 2018-01-19 | 北京东方雨虹防水技术股份有限公司 | For overlaying butyl rubber reaction adhesion coating, its preparation method of the viscous waterproof roll of reaction and overlaying the viscous waterproof roll of reaction |
| CN112831191A (en) * | 2021-01-29 | 2021-05-25 | 远大洪雨（唐山）防水材料有限公司 | Modified asphalt-based high-strength pre-laid waterproof coiled material and preparation method thereof |
| CN113717687A (en) * | 2021-09-09 | 2021-11-30 | 昆山科顺防水材料有限公司 | Environment-friendly modified asphalt self-adhesive coating material composition, environment-friendly modified asphalt self-adhesive coating material, and preparation method and application thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01240595A (en) * | 1988-03-18 | 1989-09-26 | Nkk Corp | Production of modified pitch |
| CN107603519A (en) * | 2017-09-12 | 2018-01-19 | 北京东方雨虹防水技术股份有限公司 | For overlaying butyl rubber reaction adhesion coating, its preparation method of the viscous waterproof roll of reaction and overlaying the viscous waterproof roll of reaction |
| CN112831191A (en) * | 2021-01-29 | 2021-05-25 | 远大洪雨（唐山）防水材料有限公司 | Modified asphalt-based high-strength pre-laid waterproof coiled material and preparation method thereof |
| CN113717687A (en) * | 2021-09-09 | 2021-11-30 | 昆山科顺防水材料有限公司 | Environment-friendly modified asphalt self-adhesive coating material composition, environment-friendly modified asphalt self-adhesive coating material, and preparation method and application thereof |
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