CN110003851A - A kind of road engineering modified emulsified bitumen for tie coat and preparation method thereof - Google Patents
A kind of road engineering modified emulsified bitumen for tie coat and preparation method thereof Download PDFInfo
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- CN110003851A CN110003851A CN201910264573.8A CN201910264573A CN110003851A CN 110003851 A CN110003851 A CN 110003851A CN 201910264573 A CN201910264573 A CN 201910264573A CN 110003851 A CN110003851 A CN 110003851A
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- asphalt
- emulsified asphalt
- road engineering
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- 239000010426 asphalt Substances 0.000 title claims abstract description 100
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 24
- 229920002635 polyurethane Polymers 0.000 claims abstract description 21
- 239000003381 stabilizer Substances 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 19
- 239000004814 polyurethane Substances 0.000 claims abstract description 18
- 239000012948 isocyanate Substances 0.000 claims abstract description 17
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 150000007522 mineralic acids Chemical class 0.000 claims abstract description 14
- 239000006185 dispersion Substances 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 14
- 239000000084 colloidal system Substances 0.000 claims description 13
- 239000008149 soap solution Substances 0.000 claims description 12
- 239000012790 adhesive layer Substances 0.000 claims description 10
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical group [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 6
- 239000001110 calcium chloride Substances 0.000 claims description 6
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000035515 penetration Effects 0.000 claims description 6
- 229920003009 polyurethane dispersion Polymers 0.000 claims description 6
- 238000010008 shearing Methods 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000003208 petroleum Substances 0.000 claims description 5
- -1 aliphatic ammonium salt cation Chemical class 0.000 claims description 4
- 238000005336 cracking Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 229910021556 Chromium(III) chloride Inorganic materials 0.000 claims description 2
- 229920003015 aliphatic polyurethane dispersion Polymers 0.000 claims description 2
- 125000000129 anionic group Chemical group 0.000 claims description 2
- QSWDMMVNRMROPK-UHFFFAOYSA-K chromium(3+) trichloride Chemical compound [Cl-].[Cl-].[Cl-].[Cr+3] QSWDMMVNRMROPK-UHFFFAOYSA-K 0.000 claims description 2
- 239000011636 chromium(III) chloride Substances 0.000 claims description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L magnesium chloride Substances [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 2
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 239000007787 solid Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 235000015512 Liquidambar formosana Nutrition 0.000 description 4
- 241000893545 Liquidambar formosana Species 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J195/00—Adhesives based on bituminous materials, e.g. asphalt, tar, pitch
- C09J195/005—Aqueous compositions, e.g. emulsions
-
- 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
- C08K3/16—Halogen-containing compounds
- C08K2003/162—Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride
-
- 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
- C08K3/16—Halogen-containing compounds
- C08K2003/166—Magnesium halide, e.g. magnesium chloride
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Road Paving Structures (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to technical field of road engineering materials, and in particular to a kind of road engineering modified emulsified bitumen for tie coat and preparation method thereof.Technical scheme is as follows: a kind of road engineering modified emulsified bitumen for tie coat, including following raw material components: by weight percentage, pitch 50%~60%, emulsifier 0.5%~1.2%, stabilizer 0.4%~2.3%, polyurethane aqueous dispersions 8%~18%, dispersible isocyanate curing agent 0.1%~1.4%, surplus are inorganic acid and water.Road engineering modified emulsified bitumen for tie coat provided by the invention and preparation method thereof can be improved the cohesive force and waterproof performance of sticking layer oil, mitigate the reflection crack of pavement of road.
Description
Technical Field
The invention belongs to the technical field of road engineering materials, and particularly relates to modified emulsified asphalt for a road engineering bonding layer and a preparation method thereof.
Background
The pavement maintenance or repair technology using the emulsified asphalt as the cementing material has the advantages of wide application range, convenient construction, energy consumption saving and the like. However, the traditional emulsified asphalt has low bonding strength, and when the emulsified asphalt is used as a bonding material between structural layers, the layers are easy to slip and delaminate under the action of a driving load, so that the whole bearing capacity of a pavement is reduced.
The aqueous polyurethane is a binary colloidal system taking water as a dispersion medium instead of an organic solvent, so that the aqueous polyurethane has the advantages of low temperature resistance, water resistance, chemical corrosion resistance, high viscosity and high toughness of solvent polyurethane, and has the characteristics of no toxicity, environmental protection, non-flammability, high fluidity and the like which are not possessed by solvent polyurethane.
The emulsified asphalt is modified by the aqueous polyurethane and the aqueous isocyanate (curing agent), and the novel modified emulsified asphalt not only follows the advantages of normal-temperature construction and convenient transportation of the traditional emulsified asphalt, but also has the characteristics of high viscosity, high toughness and high and low temperature resistance of the polyurethane material.
Chinese patent CN100503731C discloses a modified emulsified asphalt and a preparation method thereof, the invention modifies the emulsified asphalt by aqueous epoxy resin and a curing agent, so that the obtained modified emulsified asphalt has higher adhesive property, but in the modification process, a double-part A-type epoxy resin and an aromatic amine curing agent are used, the two substances contain a large amount of rigid benzene ring functional groups, the cured product presents hard and brittle property, the flexibility of the asphalt is reduced, and the asphalt is easy to crack under the load action.
Disclosure of Invention
The invention provides modified emulsified asphalt for a road engineering bonding layer and a preparation method thereof, which can improve the bonding force and the waterproof performance of bonding oil and reduce the reflection cracks of a road surface.
The technical scheme of the invention is as follows:
the modified emulsified asphalt for the road engineering bonding layer comprises the following raw material components: 50 to 60 percent of asphalt, 0.5 to 1.2 percent of emulsifier, 0.4 to 2.3 percent of stabilizer, 8 to 18 percent of polyurethane aqueous dispersion, 0.1 to 1.4 percent of dispersible isocyanate curing agent and the balance of inorganic acid and water.
The preferred scheme of the modified emulsified asphalt for the road engineering bonding layer is that the asphalt is road petroleum asphalt with the number of 90, the softening point of not less than 45 ℃ and the penetration of 80-100 (0.1mm) at 25 ℃.
The preferable scheme of the modified emulsified asphalt for the road engineering bonding layer is that the emulsifier is an aliphatic ammonium salt cation fast-cracking emulsifier or an aliphatic ammonium salt cation medium-cracking emulsifier.
The preferable scheme of the modified emulsified asphalt for the road engineering bonding layer is that the stabilizer is CaCl2、MgCl2Or CrCl3。
The preferable scheme of the modified emulsified asphalt for the road engineering bonding layer is that the polyurethane aqueous dispersion is an anionic aliphatic polyurethane dispersion.
The preferable scheme of the modified emulsified asphalt for the road engineering bonding layer is that the dispersible isocyanate curing agent is aliphatic diisocyanate.
The preferable scheme of the modified emulsified asphalt for the road engineering adhesive layer is that the inorganic acid is Hcl.
The preparation method of the modified emulsified asphalt for the road engineering adhesive layer is characterized by comprising the following steps:
(1) adding an emulsifier and a stabilizer into water at 50-55 ℃ in proportion, uniformly stirring, and preparing a soap solution with a pH value of 2-3 by using Hcl for later use;
(2) heating asphalt to 120-130 ℃, adding the asphalt and the soap solution into a colloid mill together according to a proportion, uniformly shearing and milling by the colloid mill to prepare emulsified asphalt, and cooling for later use;
(3) and (3) mixing the emulsified asphalt, the polyurethane aqueous dispersion and the isocyanate curing agent in proportion, and mechanically stirring for 3-6 minutes to obtain the modified emulsified asphalt.
The invention has the beneficial effects that: the raw materials of the invention have low price, easy acquisition and simple preparation process, and the prepared modified emulsified asphalt has higher viscosity and better toughness than the common modified emulsified asphalt and is lower in cost and simpler in process than the resin composite modified emulsified asphalt when used as a bonding material between road engineering structural layers. The invention can greatly improve the bonding force between road layers and reduce the engineering cost at the same time.
Detailed Description
The present invention will be described in further detail with reference to examples and comparative examples.
Example 1
The modified emulsified asphalt for the road engineering bonding layer comprises the following components in percentage by weight:
asphalt: 50 percent of
Emulsifier: 0.6 percent
A stabilizer: 0.5
Aqueous polyurethane dispersion: 8 percent of
Dispersible isocyanate curing agent: 0.8 percent
The balance of inorganic acid and water
The asphalt is road petroleum asphalt with the number of 90, the production place is Liaohe, the softening point is more than or equal to 45 ℃, and the penetration at 25 ℃ is 80-100 (0.1 mm).
The emulsifier is Liaoning Liquidambar formosana Koch product with a trademark of DEPREET RN-90.
The stabilizer is CaCl2。
Aqueous polyurethane dispersions, expressed in weight percent, of Wanhua chemistry563045% and the balance of Wanhua chemical3460; wherein,5630, the solid content is 50 +/-1%, and the viscosity is 50-900 mPa & s at 25 ℃;3460 the solid content is 50 + -1%, and the viscosity at 25 ℃ is 20-200 mPas.
The dispersible isocyanate curing agent is of Wanhua polyurethane Co., Ltd278, viscosity at 25 ℃ of 1500-3500 mPas.
The inorganic acid is HCl.
The preparation method of the modified emulsified asphalt for the road engineering adhesive layer comprises the following steps:
(1) adding an emulsifier and a stabilizer into water at 50-55 ℃ in proportion, uniformly stirring, and preparing a soap solution with a pH value of 2-3 by using Hcl for later use.
(2) Heating the base asphalt to 120-130 ℃, adding the base asphalt and the soap solution into a colloid mill together according to a proportion, uniformly shearing and milling the mixture by the colloid mill to prepare emulsified asphalt, and cooling the emulsified asphalt for later use.
(3) And mixing the emulsified asphalt, the polyurethane aqueous dispersion and the isocyanate curing agent in proportion, mechanically stirring, and stirring for 3-6 minutes to obtain the modified emulsified asphalt.
Example 2
The modified emulsified asphalt for the road engineering bonding layer comprises the following components in percentage by weight:
asphalt: 54 percent
Emulsifier: 0.9 percent
A stabilizer: 0.6
Aqueous polyurethane dispersion: 9 percent of
Dispersible isocyanate curing agent: 1.1 percent
The balance of inorganic acid and water
The asphalt is road petroleum asphalt with the number of 90, the production place is Liaohe, the softening point is more than or equal to 45 ℃, and the penetration at 25 ℃ is 80-100 (0.1 mm).
The emulsifier is Liaoning Liquidambar formosana Koch product with a trademark of DEPREET RN-90.
The stabilizer is CaCl2。
Aqueous polyurethane dispersionExpressed in weight percent, of Wanhua chemistry563060% and the balance of Wanhua chemical3460; wherein,5630, the solid content is 50 +/-1%, and the viscosity is 50-900 mPa & s at 25 ℃;3460 the solid content is 50 + -1%, and the viscosity at 25 ℃ is 20-200 mPas.
The dispersible isocyanate curing agent is of Wanhua polyurethane Co., Ltd278, viscosity at 25 ℃ of 1500-3500 mPas.
The inorganic acid is HCl.
The preparation method of the modified emulsified asphalt for the road engineering adhesive layer comprises the following steps:
(1) adding an emulsifier and a stabilizer into water at 50-55 ℃ in proportion, uniformly stirring, and preparing a soap solution with a pH value of 2-3 by using Hcl for later use.
(2) Heating the base asphalt to 120-130 ℃, adding the base asphalt and the soap solution into a colloid mill together according to a proportion, uniformly shearing and milling the mixture by the colloid mill to prepare emulsified asphalt, and cooling the emulsified asphalt for later use.
(3) And mixing the emulsified asphalt, the polyurethane aqueous dispersion and the isocyanate curing agent in proportion, mechanically stirring, and stirring for 3-6 minutes to obtain the modified emulsified asphalt.
Example 3
The modified emulsified asphalt for the road engineering bonding layer comprises the following components in percentage by weight:
asphalt: 58 percent of
Emulsifier: 1.1 percent
A stabilizer: 0.8
Aqueous polyurethane dispersion: 10 percent of
Dispersible isocyanate curing agent: 1.2 percent of
The balance of inorganic acid and water
The asphalt is road petroleum asphalt with the number of 90, the production place is Liaohe, the softening point is more than or equal to 45 ℃, and the penetration at 25 ℃ is 80-100 (0.1 mm).
The emulsifier is Liaoning Liquidambar formosana Koch product with a trademark of DEPREET RN-90.
The stabilizer is CaCl2。
The aqueous polyurethane dispersion has, in percent by weight, AH-161860% of Amarantai and the balance of Wanhua chemical3460; wherein the AH-1618 solid content is 50 +/-1%, and the viscosity is at 25 ℃>100mPa·s；3460 the solid content is 50 + -1%, and the viscosity at 25 ℃ is 20-200 mPas.
The dispersible isocyanate curing agent is of Wanhua polyurethane Co., Ltd278, viscosity at 25 ℃ of 1500-3500 mPas.
The inorganic acid is HCl.
The preparation method of the modified emulsified asphalt for the road engineering adhesive layer comprises the following steps:
(1) adding an emulsifier and a stabilizer into water at 50-55 ℃ in proportion, uniformly stirring, and preparing a soap solution with a pH value of 2-3 by using Hcl for later use.
(2) Heating the base asphalt to 120-130 ℃, adding the base asphalt and the soap solution into a colloid mill together according to a proportion, uniformly shearing and milling the mixture by the colloid mill to prepare emulsified asphalt, and cooling the emulsified asphalt for later use.
(3) And mixing the emulsified asphalt, the polyurethane aqueous dispersion and the isocyanate curing agent in proportion, mechanically stirring, and stirring for 3-6 minutes to obtain the modified emulsified asphalt.
Comparative example
The spray type modified emulsified asphalt prepared by the comparative example consists of SBS modified asphalt, an emulsifier, a tackifier, a stabilizer, inorganic acid and water.
Comparative example modified emulsified bitumen, the composition of which is expressed in weight percent:
SBS modified asphalt: 60 percent of
Emulsifier: 1.2 percent of
Tackifier: 0.4 percent
A stabilizer: 0.8 percent
The balance of inorganic acid and water
The SBS modified emulsified asphalt is produced in Liaohe of Panjin, the softening point is 65 ℃, and the penetration degree at 5 ℃ is 74.4(0.1 mm).
The emulsifier is Liaoning Liquidambar formosana Koch product with a trademark of DEPREET RN-90.
The stabilizer is CaCl2。
The inorganic acid is HCl.
The preparation method of the SBS modified emulsified asphalt comprises the following steps:
(1) adding an emulsifier, a tackifier and a stabilizer into water at 50-55 ℃ in proportion, uniformly stirring, and preparing a soap solution with a pH value of 1.8-2.2 by using Hcl for later use.
(2) And heating SBS modified asphalt to 160-170 ℃, adding the SBS modified asphalt and the soap solution prepared in the previous step into a colloid mill together in proportion, uniformly shearing and grinding the mixture by the colloid mill to prepare emulsified asphalt, and cooling the emulsified asphalt for later use.
The implementation effect is as follows:
table 1 shows the results of the tests for the road properties of examples 1, 2 and 3 and comparative example:
table 2 shows the results of the structural interlaminar shear test and the pull test for the materials of examples 1, 2, 3 and comparative example:
| detecting items | Example 1 | Example 2 | Example 3 | Comparative example |
| Shear strength, Kpa | 0.286 | 0.298 | 0.331 | 0.217 |
| Tensile strength, Mpa | 2.2 | 2.3 | 2.6 | 1.2 |
The data in Table 1 show that the indexes of examples 1, 2 and 3 all meet the requirements of technical Specification for road construction (JTG F40-2004) on modified emulsified asphalt, and the index data are superior to the test results of comparative examples.
Respectively smearing the materials of examples 1, 2 and 3 and comparative examples among prepared dense-graded Marshall test pieces, and standing for 3 days after 4 modified emulsified asphalts are demulsified and molded to perform shear test and drawing test among structural layers; the test results in Table 2 show that the interlaminar shear strength of the aqueous polyurethane modified emulsified asphalt is improved by 31.8-52.5% compared with the ratio, and the tensile strength is improved by 83.3-116.7% compared with the ratio, which indicates that the aqueous polyurethane material of the invention fully exerts the characteristics of high viscosity and high elasticity in the emulsified asphalt, and achieves the purpose of the invention. In conclusion, the modified emulsified asphalt for the road engineering bonding layer provided by the invention can be used as bonding layer oil of a road engineering interlayer structure.
Claims (8)
1. The modified emulsified asphalt for the road engineering bonding layer is characterized by comprising the following raw material components: 50 to 60 percent of asphalt, 0.5 to 1.2 percent of emulsifier, 0.4 to 2.3 percent of stabilizer, 8 to 18 percent of polyurethane aqueous dispersion, 0.1 to 1.4 percent of dispersible isocyanate curing agent and the balance of inorganic acid and water.
2. The modified emulsified asphalt for a road engineering adhesive layer according to claim 1, wherein the asphalt is road petroleum asphalt with a mark number of 90, a softening point of not less than 45 ℃, and a penetration of 80-100 (0.1mm) at 25 ℃.
3. The modified emulsified asphalt for a road engineering adhesive layer according to claim 1, wherein the emulsifier is an aliphatic ammonium salt cation fast-cracking emulsifier or an aliphatic ammonium salt cation medium-cracking emulsifier.
4. The modified emulsified asphalt for road engineering tie coat as claimed in claim 1, wherein the stabilizer is CaCl2、MgCl2Or CrCl3。
5. The modified emulsified asphalt for a road engineering tie layer according to claim 1, wherein the aqueous polyurethane dispersion is an anionic aliphatic polyurethane dispersion.
6. The modified emulsified asphalt for a road engineering adhesive layer according to claim 1, wherein the dispersible isocyanate curing agent is an aliphatic diisocyanate.
7. The modified emulsified asphalt for a road engineering adhesive layer according to claim 1, wherein the inorganic acid is Hcl.
8. The method for preparing the modified emulsified asphalt for the road engineering adhesive layer according to any one of claims 1 to 7, which comprises the following steps:
(1) adding an emulsifier and a stabilizer into water at 50-55 ℃ in proportion, uniformly stirring, and preparing a soap solution with a pH value of 2-3 by using Hcl for later use;
(2) heating asphalt to 120-130 ℃, adding the asphalt and the soap solution into a colloid mill together according to a proportion, uniformly shearing and milling by the colloid mill to prepare emulsified asphalt, and cooling for later use;
(3) and (3) mixing the emulsified asphalt, the polyurethane aqueous dispersion and the isocyanate curing agent in proportion, and mechanically stirring for 3-6 minutes to obtain the modified emulsified asphalt.
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| CN113652170A (en) * | 2021-09-13 | 2021-11-16 | 勤山(上海)机场场道工程技术有限公司 | Waterborne polyurethane-based modified SBR emulsified asphalt fog seal material, and preparation method and application thereof |
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Application publication date: 20190712 |