CN113801488A - Asphalt-based concentrated sealing fabric, preparation method thereof and sand-containing fog seal - Google Patents
Asphalt-based concentrated sealing fabric, preparation method thereof and sand-containing fog seal Download PDFInfo
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- CN113801488A CN113801488A CN202111191357.9A CN202111191357A CN113801488A CN 113801488 A CN113801488 A CN 113801488A CN 202111191357 A CN202111191357 A CN 202111191357A CN 113801488 A CN113801488 A CN 113801488A
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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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- 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
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/26—Bituminous materials, e.g. tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/06—Hydrocarbons
- C08F212/08—Styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
The invention provides an asphalt-based concentrated sealing fabric, a preparation method thereof and a sand-containing fog sealing layer, and belongs to the technical field of pavements. The asphalt-based concentrated sealing fabric provided by the invention comprises the following components in parts by weight: 100 parts of asphalt, 10-20 parts of suspending agent, 3-6 parts of emulsifier, 100-120 parts of limestone, 150-200 parts of water and 50-200 parts of modified styrene-acrylic emulsion; the modified styrene-acrylic emulsion comprises a modified styrene-acrylic emulsion A and a modified styrene-acrylic emulsion B. The results of the examples show that the viscosity of the sand-containing fog sealing layer provided by the invention is 65-70 ku, the washing and brushing resistant times reach 800-1400 times, and the wet wheel abrasion value is 24-30 g/m2The drawing strength at 25 ℃ reaches 2.2-2.6 MPa, and the wear-resisting property and the flexibility are good.
Description
Technical Field
The invention relates to the technical field of pavements, in particular to an asphalt-based concentrated sealing fabric, a preparation method thereof and a sand-containing fog seal.
Background
The sand-containing fog seal is a mixture of seal fabric and sand, the seal fabric is mainly composed of modified emulsified asphalt or coal asphalt base material, pottery clay and polymer additive, and a special sand-containing fog seal high-pressure spraying vehicle is used for spraying the mixture on the asphalt pavement to form a thin layer, so that the water seepage on the surface of the pavement can be effectively prevented, the surface of the pavement is prevented from loosening, the aging of the asphalt on the original pavement is delayed, the temperature of the asphalt surface layer is reduced, and the appearance of the pavement is improved. The technology has great significance for road section maintenance with light road surface damage and low fund shortage. After the sand-containing fog seal is constructed, the thickness of the structural layer is at the millimeter level (l-2 millimeter), but the structure layer has the defects of poor wear resistance and durability, and the design life is only l-2 years.
In the prior art, the abrasion resistance is improved by adding the styrene-acrylic emulsion into the sand-containing fog seal layer, but more styrene-acrylic emulsion needs to be added, so that the production cost is increased, and the water resistance of the sand-containing fog seal layer is reduced. The performance of the styrene-acrylic emulsion can be further improved and perfected by modifying the styrene-acrylic emulsion through the functional monomer. The functional monomer is a copolymer with functional groups obtained after copolymerization of soft and hard monomers, so that the adhesive force of the emulsion can be obviously improved, and the adhesive film has the properties of transparency, water resistance, oil resistance, heat resistance and aging resistance. Commonly used functional monomers are mainly acrylic acid, methacrylic acid, acrylamide and organosiloxanes. Although the chemical resistance and the physical property of the styrene-acrylic emulsion can be improved by the functional monomers, so that the wear resistance of the sand-containing fog seal layer is improved, the prepared sand-containing fog seal layer still has poor flexibility and cannot meet the social requirements on the performance of the sand-containing fog seal layer.
Therefore, the prepared sand-containing fog seal layer has good abrasion resistance and high flexibility.
Disclosure of Invention
The invention aims to provide an asphalt-based concentrated sealing fabric, a preparation method thereof and a sand-containing fog seal layer.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides an asphalt-based concentrated sealing fabric which comprises the following components in parts by weight: 100 parts of asphalt, 10-20 parts of suspending agent, 3-6 parts of emulsifier, 100-120 parts of limestone, 150-200 parts of water and 50-200 parts of modified styrene-acrylic emulsion;
the modified styrene-acrylic emulsion comprises a modified styrene-acrylic emulsion A and a modified styrene-acrylic emulsion B;
the modified styrene-acrylic emulsion A comprises the following raw materials: mixing a monomer 1 and glycidyl methacrylate, wherein the monomer 1 is styrene, acrylic acid, ethyl acrylate and methyl methacrylate;
the modified styrene-acrylic emulsion B comprises the following raw materials: mixing a monomer 2 and glycidyl methacrylate, wherein the monomer 2 is styrene, methacrylic acid, butyl acrylate and methyl methacrylate.
Preferably, the modified styrene-acrylic emulsion a and the modified styrene-acrylic emulsion B further comprise the following raw materials: water, sodium bicarbonate, an emulsifier, an initiator and a protective colloid.
Preferably, the mass ratio of the modified styrene-acrylic emulsion A to the modified styrene-acrylic emulsion B is (1: 0.25) to (1: 1).
Preferably, the emulsifier is a slow-breaking amide anionic asphalt emulsifier.
Preferably, the suspending agent is kaolin.
The invention provides a preparation method of an asphalt-based concentrated sealing fabric, which comprises the following steps:
(1) mixing a suspending agent with part of water to obtain a mixture 1;
(2) mixing an emulsifier and asphalt to obtain a mixture 2;
(3) mixing the mixture 1 obtained in the step (1) and the mixture 2 obtained in the step (2) to obtain a mixture 3;
(4) mixing the mixture 3 obtained in the step (3) with limestone and residual water to obtain a mixture 4;
(5) mixing the mixture 4 obtained in the step (4) with the modified styrene-acrylic emulsion to obtain an asphalt-based concentrated sealing fabric;
the step (1) and the step (2) are not in sequence.
Preferably, the temperature of the asphalt in the step (2) is 130-140 ℃.
The invention provides a sand-containing fog sealing layer, which is prepared from the asphalt-based concentrated sealing fabric prepared by the technical scheme or the asphalt-based concentrated sealing fabric prepared by the preparation method of the technical scheme.
Preferably, the sand-containing fog seal comprises the following components: 100 parts of asphalt-based concentrated sealing fabric, 40-60 parts of anti-skid aggregate and 10-18 parts of water.
Preferably, the anti-skid aggregate is at least one of corundum and basalt sand.
The invention provides an asphalt-based concentrated sealing fabric which comprises the following components in parts by weight: 100 parts of asphalt, 10-20 parts of suspending agent, 3-6 parts of emulsifier, 100-120 parts of limestone, 150-200 parts of water and 50-200 parts of modified styrene-acrylic emulsion; the modified styrene-acrylic emulsion comprises a modified styrene-acrylic emulsion A and a modified styrene-acrylic emulsion B; the modified styrene-acrylic emulsion A comprises the following raw materials: mixed monomer1 and glycidyl methacrylate, wherein the mixed monomer 1 is styrene, acrylic acid, ethyl acrylate and methyl methacrylate; the modified styrene-acrylic emulsion B comprises the following raw materials: mixing a monomer 2 and glycidyl methacrylate, wherein the monomer 2 is styrene, methacrylic acid, butyl acrylate and methyl methacrylate. The modified styrene-acrylic emulsion A is prepared from styrene, ethyl acrylate, methyl methacrylate, acrylic acid and a functional monomer glycidyl methacrylate, and the hardening and waterproof performance of the styrene-acrylic emulsion can be improved; the modified styrene-acrylic emulsion B is prepared from styrene, butyl acrylate, methacrylic acid, methyl methacrylate, acrylic acid and a functional monomer glycidyl methacrylate, so that the modified styrene-acrylic emulsion has lasting flexibility, excellent acid and alkali resistance and water resistance; by mixing the two modified styrene-acrylic emulsions, the flexibility, the scrubbing resistance and the abrasion resistance of the sealing fabric are improved, and the flexibility, the scrubbing resistance and the abrasion resistance of the sand-containing fog sealing layer are further improved. The results of the examples show that according to the test procedures of asphalt and asphalt mixture for road engineering, the viscosity of the sand-containing fog sealing layer prepared from the asphalt-based concentrated sealing fabric provided by the invention is 65-70 ku, so that the sand-suspending effect can be effectively achieved, the atomization spraying can be smoothly carried out, the washing and brushing times reach 800-1400 times, and the wet wheel abrasion value is 24-30 g/m2The drawing strength at 25 ℃ reaches 2.2-2.6 MPa, and the wear-resisting property and the flexibility are good.
Detailed Description
The invention provides an asphalt-based concentrated sealing fabric which comprises the following components in parts by weight: 100 parts of asphalt, 10-20 parts of suspending agent, 3-6 parts of emulsifier, 100-120 parts of limestone, 150-200 parts of water and 50-200 parts of modified styrene-acrylic emulsion;
the modified styrene-acrylic emulsion comprises a modified styrene-acrylic emulsion A and a modified styrene-acrylic emulsion B;
the modified styrene-acrylic emulsion A comprises the following raw materials: mixing a monomer 1 and glycidyl methacrylate, wherein the monomer 1 is styrene, acrylic acid, ethyl acrylate and methyl methacrylate;
the modified styrene-acrylic emulsion B comprises the following raw materials: mixing a monomer 2 and glycidyl methacrylate, wherein the monomer 2 is styrene, methacrylic acid, butyl acrylate and methyl methacrylate.
The asphalt-based concentrated sealing fabric comprises 100 parts of asphalt by mass. In the invention, the softening point of the asphalt is preferably 55-62 ℃, and more preferably 58-60 ℃; the penetration degree of the asphalt at 25 ℃ is preferably 30-35 (1/10mm), and more preferably 32-33 (1/10 mm); the ductility of the bitumen is preferably greater than 8cm (temperature l5 ℃ C. and stretching speed 5 cm/min). The specific type of the asphalt is not particularly limited in the present invention, and road petroleum asphalt known to those skilled in the art may be used. In the invention, the asphalt plays a role in waterproofing and bonding and fixing the aggregate.
The asphalt-based concentrated sealing fabric comprises, by mass, 100 parts of asphalt, 10-20 parts of a suspending agent, preferably 12-18 parts of the suspending agent, and more preferably 15 parts of the suspending agent. In the present invention, the suspending agent is preferably kaolin; the particle size of the kaolin is preferably 200-2000 meshes, more preferably 500-1800 meshes, and further preferably 800-1500 meshes. The suspending agent is added, so that the components can be prevented from precipitating, and the components are more easily and uniformly dispersed.
The asphalt-based concentrated sealing fabric comprises 3-6 parts by mass of an emulsifier, preferably 4-5 parts by mass of asphalt. In the present invention, the emulsifier is preferably a slow-breaking amide anionic asphalt emulsifier, more preferably including one or more of sodium dodecylbenzene sulfonate, sodium stearate and sodium laurate. In the invention, the emulsifier can promote the emulsification of the asphalt and make the asphalt better blend with the components.
The asphalt-based concentrated envelope fabric comprises 100-120 parts by mass of limestone, preferably 105-115 parts by mass of limestone, and more preferably 110 parts by mass of asphalt. In the invention, the particle size of the limestone is preferably 200-400 meshes, more preferably 220-350 meshes, and further preferably 250-300 meshes. In the present invention, the limestone serves to fill the voids and increase the bonding strength.
The asphalt-based concentrated sealing fabric comprises, by mass, 100 parts of asphalt, 150-200 parts of water, preferably 160-190 parts of water, and more preferably 170-180 parts of water. In the present invention, the water functions as a solvent.
The asphalt-based concentrated envelope fabric comprises 50-200 parts by mass of modified styrene-acrylic emulsion, preferably 80-150 parts by mass of asphalt, and more preferably 100 parts by mass of asphalt.
In the invention, the modified styrene-acrylic emulsion comprises a modified styrene-acrylic emulsion A and a modified styrene-acrylic emulsion B.
In the present invention, the mass ratio of the modified styrene-acrylic emulsion a to the modified styrene-acrylic emulsion B is preferably (1: 0.25) to (1: 1), more preferably 1: 0.5. according to the invention, the two modified styrene-acrylic emulsions are mixed for use, so that the flexibility, the scrubbing resistance and the abrasion resistance of the sealing fabric are improved, and the flexibility, the scrubbing resistance and the abrasion resistance of the sand-containing fog sealing layer are further improved.
In the invention, the modified styrene-acrylic emulsion A comprises the following raw materials: mixing a monomer 1 and glycidyl methacrylate, wherein the monomer 1 is styrene, acrylic acid, ethyl acrylate and methyl methacrylate. In the invention, the modified styrene-acrylic emulsion A comprises the following raw materials in parts by weight: 200-300 parts of styrene, 5-20 parts of acrylic acid, 150-200 parts of ethyl acrylate, 15-40 parts of methyl methacrylate and 10-50 parts of glycidyl methacrylate, more preferably 230-250 parts of styrene, 8-10 parts of acrylic acid, 160-180 parts of ethyl acrylate, 20-30 parts of methyl methacrylate and 20-35 parts of glycidyl methacrylate, and further preferably 242 parts of styrene, 9.2 parts of acrylic acid, 168 parts of ethyl acrylate, 20 parts of methyl methacrylate and 29 parts of glycidyl methacrylate. The modified styrene-acrylic emulsion A prepared by adopting the materials can improve the hardening and waterproof performance of the styrene-acrylic emulsion.
In the invention, the modified styrene-acrylic emulsion B comprises the following raw materials: mixing a monomer 2 and glycidyl methacrylate, wherein the monomer 2 is styrene, butyl methacrylate and methyl methacrylate. In the invention, the modified styrene-acrylic emulsion B comprises the following raw materials in parts by weight: 40-80 parts of styrene, 5-20 parts of methacrylic acid, 280-400 parts of butyl acrylate, 15-40 parts of methyl methacrylate and 10-30 parts of glycidyl methacrylate, more preferably 50-60 parts of styrene, 10-15 parts of methacrylic acid, 300-350 parts of butyl acrylate, 20-30 parts of methyl methacrylate and 15-20 parts of glycidyl methacrylate, and further preferably 50 parts of styrene, 10 parts of methacrylic acid, 330 parts of butyl acrylate, 20 parts of methyl methacrylate and 16 parts of glycidyl methacrylate. The modified styrene-acrylic emulsion B is prepared from styrene, butyl acrylate, methacrylic acid, methyl methacrylate, acrylic acid and a functional monomer glycidyl methacrylate, so that the modified styrene-acrylic emulsion has lasting flexibility, excellent acid and alkali resistance and water resistance.
In the present invention, the raw materials of the modified styrene-acrylic emulsion a and the modified styrene-acrylic emulsion B preferably further include: water, sodium bicarbonate, an emulsifier, an initiator and a protective colloid.
In the invention, the raw materials of the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B independently comprise 500-550 parts of water, preferably 510 parts by mass of the reaction monomer, which is 400-500 parts by mass of the reaction monomer. In the present invention, the water is preferably deionized water. The invention adopts deionized water as raw material to avoid introducing impurities.
In the invention, the raw materials of the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B independently comprise 0.1-1 part by mass of sodium bicarbonate, preferably 0.5 part by mass of a reaction monomer of 400-500 parts by mass of the reaction monomer. The pH of the system can be adjusted by adding sodium bicarbonate.
In the invention, the raw materials of the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B independently comprise 15-30 parts of emulsifier, preferably 19 parts by mass of the reaction monomer of 400-500 parts. In the present invention, the emulsifier is preferably alkylphenol ether sulfosuccinate sodium salt. According to the invention, the emulsifier is added for emulsification, so that the mixed monomer can be uniformly mixed with water and sodium bicarbonate.
In the invention, the raw materials of the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B independently comprise 1-5 parts of initiator by mass of 400-500 parts of reaction monomer, preferably 2-3 parts. In the present invention, the initiator is preferably ammonium persulfate. The invention can lead the monomer to generate polymerization reaction by adding the initiator.
In the invention, the raw materials of the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B independently comprise 8-10 parts of protective colloid, preferably 8.36-9 parts by mass of a reaction monomer of 400-500 parts by mass. In the present invention, the protective colloid is preferably sodium polymethacrylate. The invention can prevent the aggregation of particles in the dispersion in the polymerization process by adding the protective colloid, and improve the polymerization efficiency.
In the present invention, the preparation method of the modified styrene-acrylic emulsion a or the modified styrene-acrylic emulsion B preferably comprises the following steps:
(1) mixing the mixed monomer 1 or the mixed monomer 2 with the first part of water, sodium bicarbonate and an emulsifier, and then pre-emulsifying to obtain a pre-emulsion;
(2) mixing the initiator with the second part of water to obtain an initiator solution;
(3) mixing the protective colloid with the third part of water to obtain a protective colloid solution;
(4) mixing part of the pre-emulsion obtained in the step (1), part of the initiator solution obtained in the step (2) and the protective colloid solution obtained in the step (3) with the rest of water, performing seed emulsion polymerization, then adding the rest of the pre-emulsion and the rest of the initiator solution for polymerization reaction, and finally adding glycidyl methacrylate to obtain a modified styrene-acrylic emulsion A or a modified styrene-acrylic emulsion B;
the step (1), the step (2) and the step (3) have no sequence.
In the invention, preferably, the mixed monomer 1 or the mixed monomer 2 is mixed with the first part of water, sodium bicarbonate and the emulsifier and then pre-emulsified to obtain the pre-emulsion. In the present invention, the pre-emulsification is preferably carried out in a pre-emulsification vessel. In the invention, the mass part of the first part of water is preferably 200 to 210 parts, and more preferably 202 parts, based on 500 to 550 parts of the total mass part of water. In the invention, the pre-emulsification is preferably carried out under the condition of stirring, and the stirring time is preferably 45-60 min. The invention can fully disperse the mixed monomer in water through pre-emulsification.
In the present invention, the mixing manner is preferably to drop the mixed monomer 1 or the mixed monomer 2 into the mixed solution of the first water, the sodium bicarbonate and the emulsifier, and the dropping time is preferably 15 to 30 min. The invention adds the mixed monomer 1 or the mixed monomer 2 in a dropping mode, so that the pre-emulsification is more complete.
The present invention preferably mixes the initiator with the second portion of water to obtain the initiator solution. In the invention, the mass fraction of the second part of water is preferably 60-70 parts, and more preferably 64-65 parts, based on 500-550 parts of the total mass fraction of water. The invention prepares the initiator solution in advance, which is convenient for the use of the subsequent polymerization.
The invention preferably mixes the protective colloid with the third portion of water to obtain the protective colloid solution. In the invention, the mass part of the third part of water is preferably 40-50 parts, and more preferably 44-45 parts, calculated by the total mass part of water being 500-550 parts. The invention prepares the protective colloid solution in advance, which can lead the protective colloid to be dispersed evenly.
After the pre-emulsion, the initiator solution and the protective colloid solution are obtained, part of the pre-emulsion, part of the initiator solution and the protective colloid solution are preferably mixed with the rest of water for seed emulsion polymerization, then the rest of the pre-emulsion and the rest of the initiator solution are added for polymerization reaction, and finally glycidyl methacrylate is added to obtain the modified styrene-acrylic emulsion A or the modified styrene-acrylic emulsion B.
In the present invention, the seed emulsion polymerization and the polymerization reaction are preferably carried out in a polymerization vessel.
In the present invention, the temperature at which the part of the pre-emulsion, the part of the initiator solution, and the protective colloid solution are mixed with the remaining water is preferably 65 to 75 ℃, and more preferably 70 ℃. In the invention, the mass part of the partial pre-emulsion is preferably 50-70 parts, and more preferably 60 parts; the mass part of the partial initiator solution is preferably 25-35 parts, and more preferably 30 parts.
In the invention, the temperature of the seed emulsion polymerization is preferably not less than 80 ℃, and more preferably 80-85 ℃; the time of the seed emulsion polymerization is preferably 8-12 min, and more preferably 10 min. The invention adopts a seed emulsion polymerization mode to effectively control the diameter and the distribution of the polymer and simultaneously improve the polymerization rate.
In the present invention, the remaining pre-emulsion and the remaining initiator solution are preferably added dropwise. The dropping rate is not particularly limited in the invention, and can be adjusted according to the requirements of polymerization reaction.
In the invention, the temperature of the polymerization reaction is preferably 84-86 ℃, and more preferably 85 ℃.
After the polymerization reaction is finished, the present invention preferably filters and cools the product of the polymerization reaction. The specific operation of the filtration and cooling is not particularly limited in the present invention, and the filtration and cooling process commonly used in the art may be employed. The invention can remove impurities in the product by filtration.
After glycidyl methacrylate is added, the pH value of the system is preferably regulated to 7.5-9. The invention can improve the chemical stability of the modified styrene-acrylic emulsion by regulating and controlling the pH value of the system.
The modified styrene-acrylic emulsion A is prepared from styrene, ethyl acrylate, methyl methacrylate, acrylic acid and a functional monomer glycidyl methacrylate, and the hardening and waterproof performance of the styrene-acrylic emulsion can be improved; the modified styrene-acrylic emulsion B is prepared from styrene, butyl acrylate, methacrylic acid, methyl methacrylate, acrylic acid and a functional monomer glycidyl methacrylate, so that the modified styrene-acrylic emulsion has lasting flexibility, excellent acid and alkali resistance and water resistance.
The invention also provides a preparation method of the asphalt-based concentrated sealing fabric, which comprises the following steps:
(1) mixing a suspending agent with part of water to obtain a mixture 1;
(2) mixing an emulsifier and asphalt to obtain a mixture 2;
(3) mixing the mixture 1 obtained in the step (1) and the mixture 2 obtained in the step (2) to obtain a mixture 3;
(4) mixing the mixture 3 obtained in the step (3) with limestone and residual water to obtain a mixture 4;
(5) mixing the mixture 4 obtained in the step (4) with the modified styrene-acrylic emulsion to obtain an asphalt-based concentrated sealing fabric;
the step (1) and the step (2) are not in sequence.
The invention mixes the suspending agent with part of the water to obtain mixture 1.
In the present invention, the amount of the part of water is preferably not less than 120 parts by mass, and more preferably 135 parts by mass. In the present invention, the temperature of the mixing is preferably > 90 ℃. In the present invention, the mixing is preferably performed by stirring; the rotating speed of the stirring is preferably 500-2000 r/min, and more preferably 1000-1500 r/min; the stirring time is preferably 10-15 min, more preferably 11-14 min, and further preferably 12-13 min. The invention can lead the suspending agent to be evenly dispersed in water by controlling the mixing temperature, and can further improve the dispersing effect by stirring and mixing.
The invention mixes the emulsifier and the asphalt to obtain a mixture 2.
In the invention, the temperature of the asphalt is preferably 130-140 ℃. The present invention controls the temperature of asphalt within the above range, and can melt asphalt, mix it with emulsifier and emulsify it.
In the present invention, the mixing is preferably performed by stirring; the rotating speed of the stirring is preferably 250-300 r/min, and more preferably 270-290 r/min; the stirring time is preferably 10-20 min, more preferably 12-18 min, and further preferably 15 min. The invention can mix the emulsifier and the asphalt evenly by stirring, thereby leading the asphalt to be emulsified more completely.
In the present invention, the mixture 1 and the mixture 2 are prepared without any sequence, and can be prepared simultaneously or first.
After obtaining mixture 1 and mixture 2, the present invention mixes said mixture 1 and said mixture 2 to obtain mixture 3. In the present invention, the mixing is preferably performed by stirring; the rotating speed of the stirring is preferably 2000-3000 r/min, and more preferably 2500 r/min; the stirring time is preferably 15-20 min. The invention can mix all the components more uniformly by stirring.
After obtaining the mixture 3, the present invention mixes said mixture 3 with limestone and the remaining water to obtain the mixture 4. In the present invention, the mixing is preferably performed by stirring; the rotating speed of the stirring is preferably 1500-2000 r/min; the stirring time is preferably 10-15 min. The invention can mix all the components more uniformly by stirring.
After the mixing is finished, the mixed product is preferably cooled by the present invention to obtain a mixture 4. In the present invention, the temperature after cooling is preferably < 60 ℃. The cooling method of the present invention is not particularly limited, and a conventional cooling method may be used. The mixture 4 is cooled, and the modified styrene-acrylic emulsion is poor in thermal stability, so that the modified styrene-acrylic emulsion is extracted at an excessively high temperature to be solidified and condensed in properties, the pavement construction of the product is not facilitated, and the performance of the asphalt-based concentrated sealing fabric is also adversely affected.
After the mixture 4 is obtained, the mixture 4 is mixed with the modified styrene-acrylic emulsion to obtain the asphalt-based concentrated envelope fabric. In the present invention, the mixing is preferably performed by stirring; the rotating speed of the stirring is preferably 500-1500 r/min, and more preferably 1000 r/min; the stirring time is preferably 5-10 min. The invention can mix all the components more uniformly by stirring.
The preparation method is simple, the asphalt-based concentrated sealing fabric can be finished by adopting the existing equipment, and the additional production cost is not required to be increased.
The invention also provides a sand-containing fog sealing layer which is prepared from the asphalt-based concentrated sealing fabric or the asphalt-based concentrated sealing fabric prepared by the preparation method in the technical scheme.
In the present invention, the sand-containing fog seal preferably comprises the following components: 100 parts of asphalt-based concentrated sealing fabric, 40-60 parts of anti-skid aggregate and 10-18 parts of water.
According to the mass portion, the sand-containing fog seal coat provided by the invention preferably comprises 100 portions of asphalt-based concentrated seal fabric.
The sand-containing fog seal layer provided by the invention preferably comprises 40-60 parts of anti-skid aggregate, more preferably 45-55 parts, and most preferably 50 parts by mass of asphalt-based concentrated seal fabric which is 100 parts by mass. In the present invention, the slip-resistant aggregate is preferably at least one of corundum and basalt sand; the grading of the anti-skid aggregate is preferably as follows: the ratio of 20 meshes to 30 meshes is 0-5 wt.%, the ratio of 30 meshes to 70 meshes is 80-90 wt.%, and the ratio of more than 70 meshes is 0-5 wt.%. The invention adopts the anti-skid aggregate and designs the gradation, so that the sand-containing fog seal layer has good compressive strength and anti-skid property.
The sand-containing fog seal coat provided by the invention preferably comprises 10-18 parts of water, more preferably 12-16 parts of water, and even more preferably 14-15 parts of water, based on 100 parts of asphalt-based concentrated seal fabric by mass. The invention can adjust the fluidity of the sand-containing fog sealing layer by adding water, and is convenient for construction.
The viscosity of the sand-containing fog sealing layer provided by the invention is 65-70 ku, so that a good sand suspending effect can be effectively achieved, the fog can be smoothly sprayed, the number of washing and brushing times reaches 800-1400 times, and the sand-containing fog sealing layer has good wear resistance and flexibility.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An asphalt-based concentrated sealing fabric comprises the following components in parts by weight: 100 parts of asphalt, 15 parts of kaolin, 3 parts of sodium laurate, 120 parts of limestone, 180 parts of water and 100 parts of modified styrene-acrylic emulsion;
the modified styrene-acrylic emulsion consists of a modified styrene-acrylic emulsion A and a modified styrene-acrylic emulsion B; the mass ratio of the modified styrene-acrylic emulsion A to the modified styrene-acrylic emulsion B is 1: 1;
the modified styrene-acrylic emulsion A comprises the following raw materials: 510 parts of deionized water, 0.5 part of sodium bicarbonate, 19 parts of alkylphenol ether sulfosuccinate sodium salt, 2.4 parts of ammonium persulfate, 9 parts of sodium polymethacrylate, mixed monomer 1(242 parts of styrene, 9.2 parts of acrylic acid, 168 parts of ethyl acrylate and 20 parts of methyl methacrylate) and 29 parts of glycidyl methacrylate;
the preparation method of the modified styrene-acrylic emulsion A comprises the following steps:
(1) adding 202 parts of deionized water, 0.5 part of sodium bicarbonate and 19 parts of alkylphenol ether sulfosuccinate sodium salt into a pre-emulsification kettle, and then dropwise adding the mixed monomer 1 while stirring, wherein the dropwise adding time is 20min, and the stirring time is 60 mm, so as to obtain a pre-emulsion;
(2) mixing 2.4 parts of ammonium persulfate and 64 parts of deionized water to obtain 66.4 parts of initiator solution;
(3) mixing 9 parts of sodium polymethacrylate and 44 parts of deionized water to obtain 53 parts of protective colloid solution;
(4) adding 200 parts of deionized water, 53 parts of protective colloid solution and 60 parts of pre-emulsion into a polymerization kettle, heating to 70 ℃, then adding 30 parts of initiator solution, heating to 80 ℃ for seed emulsion polymerization, observing blue light emission of the bottom emulsion of the kettle, keeping the temperature for 10min, heating to 84 ℃, simultaneously dropwise adding the rest of pre-emulsion and the rest of initiator solution for polymerization reaction, filtering and cooling the product of the polymerization reaction, adding 29 parts of glycidyl methacrylate, and adjusting the pH value to 8 to obtain modified styrene-acrylic emulsion A;
the modified styrene-acrylic emulsion B comprises the following raw materials: 510 parts of water, 0.5 part of sodium bicarbonate, 19 parts of sodium alkylphenol ether sulfosuccinate, 2.4 parts of ammonium persulfate, 8.36 parts of sodium polymethacrylate, mixed monomer 2(50 parts of styrene, 10 parts of methacrylic acid, 330 parts of butyl acrylate and 20 parts of methyl methacrylate) and 16 parts of glycidyl methacrylate;
the preparation method of the modified styrene-acrylic emulsion B comprises the following steps:
(1) adding 202 parts of deionized water, 0.5 part of sodium bicarbonate and 19 parts of alkylphenol ether sulfosuccinate sodium salt into a pre-emulsification kettle, and then dropwise adding the mixed monomer 2 while stirring, wherein the dropwise adding time is 20min, and the stirring time is 60 mm, so as to obtain a pre-emulsion;
(2) mixing 2.4 parts of ammonium persulfate and 64 parts of deionized water to obtain 66.4 parts of initiator solution;
(3) mixing 8.36 parts of sodium polymethacrylate and 44 parts of deionized water to obtain 52.36 parts of protective colloid solution;
(4) adding 200 parts of deionized water, 52.36 parts of protective colloid solution and 60 parts of pre-emulsion into a polymerization kettle, heating to 70 ℃, then adding 30 parts of initiator solution, heating to 80 ℃ for seed emulsion polymerization, observing blue light emission of the emulsion at the bottom of the kettle, heating to 84 ℃ after heat preservation for 10min, simultaneously dropwise adding the rest of pre-emulsion and the rest of initiator solution for polymerization reaction, filtering and cooling the product of the polymerization reaction, adding 16 parts of glycidyl methacrylate, and adjusting the pH value to 8 to obtain modified styrene-acrylic emulsion B;
the preparation method of the asphalt-based concentrated sealing fabric comprises the following steps:
(1) heating 135 parts of water to 90 ℃, and then stirring and mixing with 15 parts of kaolin to obtain a mixture 1; the stirring speed is 1000r/min, and the stirring time is 15 min;
(2) stirring and mixing 3 parts of sodium laurate and 100 parts of asphalt at 140 ℃ in an asphalt processing tank to obtain a mixture 2; the stirring speed is 300r/min, and the stirring time is 20 min;
(3) stirring and mixing the mixture 1 obtained in the step (1) and the mixture 2 obtained in the step (2) to obtain a mixture 3; the stirring speed is 2500r/min, and the stirring time is 20 min;
(4) stirring and mixing the mixture 3 obtained in the step (3) with 120 parts of limestone and 45 parts of water, and then cooling to a temperature lower than 60 ℃ to obtain a mixture 4; the stirring speed is 1500r/min, and the stirring time is 20 min;
(5) stirring and mixing the mixture 4 obtained in the step (4) with the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B to obtain an asphalt-based concentrated sealing fabric; the stirring speed is 1500r/min, and the stirring time is 5 min.
Example 2
An asphalt-based concentrated sealing fabric comprises the following components in parts by weight: 100 parts of asphalt, 18 parts of kaolin, 4 parts of sodium dodecyl benzene sulfonate, 120 parts of limestone, 175 parts of water and 100 parts of modified styrene-acrylic emulsion;
the modified styrene-acrylic emulsion consists of a modified styrene-acrylic emulsion A and a modified styrene-acrylic emulsion B; the composition and the preparation method of the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B are the same as those of the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B in the embodiment 1; the mass ratio of the modified styrene-acrylic emulsion A to the modified styrene-acrylic emulsion B is 2: 1;
the preparation method of the asphalt-based concentrated sealing fabric comprises the following steps:
(1) heating 140 parts of water to 90 ℃, and then stirring and mixing with 18 parts of kaolin to obtain a mixture 1; the stirring speed is 1500r/min, and the stirring time is 15 min;
(2) stirring and mixing 4 parts of sodium dodecyl benzene sulfonate and 100 parts of 135 ℃ asphalt in an asphalt processing tank to obtain a mixture 2; the stirring speed is 400r/min, and the stirring time is 20 min;
(3) stirring and mixing the mixture 1 obtained in the step (1) and the mixture 2 obtained in the step (2) to obtain a mixture 3; the stirring speed is 2500r/min, and the stirring time is 20 min;
(4) stirring and mixing the mixture 3 obtained in the step (3) with 120 parts of limestone and 35 parts of water, and then cooling to a temperature lower than 60 ℃ to obtain a mixture 4; the stirring speed is 1500r/min, and the stirring time is 20 min;
(5) stirring and mixing the mixture 4 obtained in the step (4) with the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B to obtain an asphalt-based concentrated sealing fabric; the stirring speed is 1500r/min, and the stirring time is 5 min.
Example 3
An asphalt-based concentrated sealing fabric comprises the following components in parts by weight: 100 parts of asphalt, 19 parts of kaolin, 4 parts of sodium dodecyl benzene sulfonate, 110 parts of limestone, 175 parts of water and 100 parts of modified styrene-acrylic emulsion;
the modified styrene-acrylic emulsion consists of a modified styrene-acrylic emulsion A and a modified styrene-acrylic emulsion B; the composition and the preparation method of the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B are the same as those of the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B in the embodiment 1; the mass ratio of the modified styrene-acrylic emulsion A to the modified styrene-acrylic emulsion B is 3: 2;
the preparation method of the asphalt-based concentrated sealing fabric comprises the following steps:
(1) heating 145 parts of water to 90 ℃, and then stirring and mixing with 19 parts of kaolin to obtain a mixture 1; the stirring speed is 1500r/min, and the stirring time is 15 min;
(2) stirring and mixing 4 parts of sodium dodecyl benzene sulfonate and 100 parts of 138 ℃ asphalt in an asphalt processing tank to obtain a mixture 2; the stirring speed is 400r/min, and the stirring time is 15 min;
(3) stirring and mixing the mixture 1 obtained in the step (1) and the mixture 2 obtained in the step (2) to obtain a mixture 3; the stirring speed is 2500r/min, and the stirring time is 20 min;
(4) stirring and mixing the mixture 3 obtained in the step (3) with 110 parts of limestone and 30 parts of water, and then cooling to a temperature lower than 60 ℃ to obtain a mixture 4; the stirring speed is 1500r/min, and the stirring time is 10 min;
(5) stirring and mixing the mixture 4 obtained in the step (4) with the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B to obtain an asphalt-based concentrated sealing fabric; the stirring speed is 1500r/min, and the stirring time is 5 min.
Application example 1
A sand-containing fog seal prepared using the asphalt-based concentrated seal fabric of example 1, the sand-containing fog seal consisting of: 100 parts of asphalt-based concentrated envelope fabric, 40 parts of basalt and 15 parts of water; the sand-containing fog seal layer is obtained by mixing all the components and stirring at 1000 r/min;
the viscosity of the sand-containing fog sealing layer tested by a stormer viscometer is 67ku, so that a good sand suspending effect can be effectively achieved, and the fog can be smoothly atomized; according to the test procedure of asphalt and asphalt mixture for highway engineering, the performance of the sand-containing fog seal is tested, the number of times of washing and brushing of the sand-containing fog seal reaches 1385, and the sand-containing fog seal wet wheel abrasion test is that the wet wheel abrasion value is 28.8g/m2The drawing strength at 25 ℃ is 2.28MPa, and the wear-resisting property and the flexibility are good.
Application example 2
A sand-containing fog seal prepared using the asphalt-based concentrated seal fabric of example 2, the sand-containing fog seal consisting of the following components: 100 parts of asphalt-based concentrated envelope fabric, 50 parts of basalt and 17 parts of water; the sand-containing fog seal layer is obtained by mixing all the components and stirring at 1000 r/min;
the viscosity of the sand-containing fog sealing layer tested by a stormer viscometer is 68ku, so that a good sand suspending effect can be effectively achieved, and the fog can be smoothly atomized; according to the test procedure of asphalt and asphalt mixture for highway engineering, the sand-containing fog seal is subjected to performance test, the number of times of washing and brushing for the washing and brushing resistance test of the sand-containing fog seal reaches 881 times, and the sand-containing fog seal wet wheel abrasion test is that the wet wheel abrasion value is 24.5g/m2The drawing strength at 25 ℃ is 2.52MPa, and the wear-resisting property and the flexibility are good.
Application example 3
A sand-containing fog seal prepared using the asphalt-based concentrated seal fabric of example 3, the sand-containing fog seal consisting of: 100 parts of asphalt-based concentrated envelope fabric, 48 parts of basalt and 17 parts of water; the sand-containing fog seal layer is obtained by mixing all the components and stirring at 900 r/min;
the viscosity of the sand-containing fog sealing layer tested by a stormer viscometer is 67ku, so that a good sand suspending effect can be effectively achieved, and the fog can be smoothly atomized; according to the test procedure of asphalt and asphalt mixture for highway engineering, the sand-containing fog seal is subjected to performance test, the number of times of washing and brushing of the sand-containing fog seal in a washing and brushing resistant test reaches 982 times, and the sand-containing fog seal in a wet wheel abrasion test is that the wet wheel abrasion value is 26.5g/m2The drawing strength at 25 ℃ is 2.39MPa, and the wear-resisting property and the flexibility are good.
Comparative example 1
The asphalt-based sealing fabric comprises the following components: 35 parts of pottery clay (main component SiO)2，Al2O3The fireproof degree is 1508-1545 ℃, the expansion coefficient is 28mL/2g, the colloid value is 40%, the granularity is 300 meshes, 100 parts of asphalt (road petroleum asphalt, the softening point is 57 ℃), 120 parts of hot water at 95 ℃, 5 parts of lauric acid and 40 parts of cold water;
the preparation method of the asphalt-based sealing fabric comprises the following steps:
(1) fully stirring 5 parts of lauric acid and 120 parts of hot water to obtain an emulsion; the stirring speed is 100r/min, and the stirring time is 3 min;
(2) adding 35 parts of argil into the emulsion obtained in the step (1) and uniformly stirring to obtain a slurry type emulsified soap solution; the stirring speed is 300r/min, and the stirring time is 7 min;
(3) heating the asphalt to 135 ℃ to melt, stirring and mixing the asphalt and the slurry type emulsified soap liquid in the step (2) at the stirring speed of 300r/min for 15min, and then adding 40 parts of cold water to obtain the asphalt-based sealing fabric;
the sand-containing fog seal coat prepared by using the asphalt-based seal fabric comprises the following components: 100 parts of asphalt-based sealing fabric, 50 parts of basalt and 16 parts of water; the sand-containing fog seal layer is obtained by mixing the components and stirring at 500 r/min;
and (3) carrying out performance test on the sand-containing fog seal according to the test procedure of asphalt and asphalt mixture for highway engineering, wherein the washing-resistant times of the sand-containing fog seal in the washing-resistant test are 106 times, and the sand-containing fog seal in the wet wheel abrasion test is that the wet wheel abrasion value is 69.4g/m2The 25 ℃ drawing strength is 0.71MPa, and the abrasion resistance and the flexibility are poor.
Comparative example 2
The asphalt-based sealing fabric comprises the following components: 50 parts of pottery clay (main component SiO)2，Al2O3The refractoriness is 1508-1545 ℃, the expansion coefficient is 28mL/2g, the colloid value is 40%,the granularity is 300 meshes), 120 parts of asphalt (road petroleum asphalt with the softening point of 57 ℃), 180 parts of hot water with the temperature of 95 ℃, 8 parts of sodium dodecyl benzene sulfonate and 48 parts of cold water;
the preparation method of the asphalt-based sealing fabric comprises the following steps:
(1) fully stirring 8 parts of sodium dodecyl benzene sulfonate and 180 parts of hot water to obtain an emulsion; the stirring speed is 200r/min, and the stirring time is 5 min;
(2) adding 50 parts of argil into the emulsion obtained in the step (1) and uniformly stirring to obtain a slurry type emulsified soap solution; the stirring speed is 300r/min, and the stirring time is 7 min;
(3) heating the asphalt to 134 ℃ to melt, stirring and mixing the asphalt and the slurry type emulsified soap liquid in the step (2) at the stirring speed of 300r/min for 20min, and then adding 48 parts of cold water to obtain the asphalt-based sealing fabric;
the sand-containing fog seal coat prepared by using the asphalt-based seal fabric comprises the following components: 100 parts of asphalt-based sealing fabric, 50 parts of basalt and 17 parts of water; the sand-containing fog seal layer is obtained by mixing the components and stirring at 500 r/min;
and (3) carrying out performance test on the sand-containing fog seal according to the test procedure of asphalt and asphalt mixture for highway engineering, wherein the washing-resistant times of the sand-containing fog seal in the washing-resistant test are 128 times, and the sand-containing fog seal in the wet wheel abrasion test is that the wet wheel abrasion value is 66.2g/m2The 25 ℃ drawing strength is 0.82MPa, and the abrasion resistance and the flexibility are poor.
As can be seen from the records of application examples 1 to 3, the viscosity of the sand-containing fog sealing layer prepared by the asphalt-based concentrated sealing fabric provided by the invention is proper, so that a good sand suspending effect can be effectively achieved, and the atomization can be smoothly sprayed; and the sand-containing fog seal layer has good washing resistance, abrasion resistance and flexibility.
By comparing the application example 2 with the comparative example 1 and comparing the application example 3 with the comparative example 2, the scrubbing resistance, the wear resistance and the flexibility of the asphalt-based concentrated sealing fabric provided by the invention are greatly improved compared with the existing asphalt-based sealing fabric.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An asphalt-based concentrated envelope fabric comprises the following components in parts by weight: 100 parts of asphalt, 10-20 parts of suspending agent, 3-6 parts of emulsifier, 100-120 parts of limestone, 150-200 parts of water and 50-200 parts of modified styrene-acrylic emulsion;
the modified styrene-acrylic emulsion comprises a modified styrene-acrylic emulsion A and a modified styrene-acrylic emulsion B;
the modified styrene-acrylic emulsion A comprises the following raw materials: mixing a monomer 1 and glycidyl methacrylate, wherein the monomer 1 is styrene, acrylic acid, ethyl acrylate and methyl methacrylate;
the modified styrene-acrylic emulsion B comprises the following raw materials: mixing a monomer 2 and glycidyl methacrylate, wherein the monomer 2 is styrene, methacrylic acid, butyl acrylate and methyl methacrylate.
2. The asphalt-based concentrated capstock material as claimed in claim 1, wherein the modified styrene-acrylic emulsion A and the modified styrene-acrylic emulsion B further comprise the following raw materials: water, sodium bicarbonate, an emulsifier, an initiator and a protective colloid.
3. The asphalt-based concentrated capstock material according to claim 1 or 2, wherein the mass ratio of the modified styrene-acrylic emulsion A to the modified styrene-acrylic emulsion B is (1: 0.25) to (1: 1).
4. The asphalt-based concentrated capstock material of claim 1, wherein the emulsifier is a slow-breaking amide anionic asphalt emulsifier.
5. The asphalt-based concentrated capstock of claim 1, wherein the suspending agent is kaolin clay.
6. The preparation method of the asphalt-based concentrated envelope fabric as claimed in claims 1 to 5, comprising the following steps:
(1) mixing a suspending agent with part of water to obtain a mixture 1;
(2) mixing an emulsifier and asphalt to obtain a mixture 2;
(3) mixing the mixture 1 obtained in the step (1) and the mixture 2 obtained in the step (2) to obtain a mixture 3;
(4) mixing the mixture 3 obtained in the step (3) with limestone and residual water to obtain a mixture 4;
(5) mixing the mixture 4 obtained in the step (4) with the modified styrene-acrylic emulsion to obtain an asphalt-based concentrated sealing fabric;
the step (1) and the step (2) are not in sequence.
7. The method according to claim 6, wherein the temperature of the asphalt in the step (2) is 130 to 140 ℃.
8. A sand-containing fog seal coat is prepared from the asphalt-based concentrated seal fabric of claims 1 to 5 or the asphalt-based concentrated seal fabric prepared by the preparation method of claims 6 to 7.
9. The sand-containing fog seal of claim 8 wherein the sand-containing fog seal comprises the following components: 100 parts of asphalt-based concentrated sealing fabric, 40-60 parts of anti-skid aggregate and 10-18 parts of water.
10. The sand-containing fog seal of claim 9 wherein the skid-resistant aggregate is at least one of corundum and basalt sand.
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| CN113801488B (en) | 2022-09-23 |
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