CN116041971A - Emulsified asphalt modifier and preparation method and application thereof - Google Patents
Emulsified asphalt modifier and preparation method and application thereof Download PDFInfo
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- CN116041971A CN116041971A CN202111265771.XA CN202111265771A CN116041971A CN 116041971 A CN116041971 A CN 116041971A CN 202111265771 A CN202111265771 A CN 202111265771A CN 116041971 A CN116041971 A CN 116041971A
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- emulsified asphalt
- sbs
- asphalt modifier
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- asphalt
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- 239000010426 asphalt Substances 0.000 title claims abstract description 107
- 239000003607 modifier Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000839 emulsion Substances 0.000 claims abstract description 33
- 239000012875 nonionic emulsifier Substances 0.000 claims abstract description 23
- 239000012628 flowing agent Substances 0.000 claims abstract description 7
- 239000003995 emulsifying agent Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000003921 oil Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 12
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 238000004945 emulsification Methods 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 8
- 239000004359 castor oil Substances 0.000 claims description 7
- 235000019438 castor oil Nutrition 0.000 claims description 7
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 claims description 7
- 230000000051 modifying effect Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000012298 atmosphere Substances 0.000 claims description 2
- 150000002193 fatty amides Chemical class 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000000376 reactant Substances 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 4
- 125000000129 anionic group Chemical group 0.000 abstract description 3
- 125000002091 cationic group Chemical group 0.000 abstract description 3
- 230000001804 emulsifying effect Effects 0.000 description 18
- -1 polyoxyethylene nonyl phenyl ether Polymers 0.000 description 11
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 7
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- RNMDNPCBIKJCQP-UHFFFAOYSA-N 5-nonyl-7-oxabicyclo[4.1.0]hepta-1,3,5-trien-2-ol Chemical compound C(CCCCCCCC)C1=C2C(=C(C=C1)O)O2 RNMDNPCBIKJCQP-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000004816 latex Substances 0.000 description 1
- 229920000126 latex Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- 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
- C08L95/005—Aqueous compositions, e.g. emulsions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
Abstract
The invention belongs to the technical field of asphalt modified materials, and particularly relates to an emulsified asphalt modifier, and a preparation method and application thereof. The emulsified asphalt modifier takes SBS as a modified component, and forms water-soluble SBS emulsion by adding selected compatilizer, flowing agent and nonionic emulsifier. In the water-soluble SBS emulsion, the SBS content is high, the property is stable, the compatibility with asphalt is good, the water-soluble SBS emulsion can be added into nonionic emulsified asphalt, cationic emulsified asphalt or anionic emulsified asphalt in a larger proportion, the high-temperature and low-temperature performances of asphalt can be obviously improved, and the application range of the emulsified asphalt is widened.
Description
Technical Field
The invention belongs to the technical field of asphalt modified materials, and particularly relates to an emulsified asphalt modifier, and a preparation method and application thereof.
Background
The emulsified asphalt is an oil-in-water liquid asphalt material which is formed by taking asphalt as a disperse phase and water as a disperse medium, and suspending asphalt particles in an emulsifier aqueous solution through mechanical action. The emulsified asphalt is not required to be heated during construction, can be subjected to cold construction operation, has the advantages of convenient use, time and labor saving, is free from environmental pollution, is quite various, is mainly used for waterproofing of roofs, cave houses and the like of construction engineering besides road engineering, is used for manufacturing heat insulation materials, and has quite wide application fields in the aspects of corrosion prevention of metal and nonmetal materials and the like.
The main component of emulsified asphalt is asphalt, and the main properties of the product are also determined by the asphalt used. Because asphalt is hot and cold in nature, emulsified asphalt prepared from traditional asphalt cannot fully meet the use requirement in performance, and therefore, the emulsified asphalt needs to be modified to obtain products with ideal performance. The methods for modifying emulsified asphalt reported in the prior art mainly comprise two methods, namely, firstly modifying asphalt and then emulsifying the modified asphalt, and secondly, emulsifying asphalt and then adding modifier emulsion.
It is reported that SBS can improve the high temperature and low temperature performance of asphalt at the same time, and is the asphalt modifier with the largest dosage at present, but because SBS is in a solid form, when the SBS is modified by emulsified asphalt, SBS modified asphalt can only be prepared first and then is emulsified. However, this modification requires relatively high levels of emulsifying equipment, emulsifying agents and emulsifying conditions, and it is generally required that the SBS content not exceed 5%, otherwise it is difficult to emulsify, but this is not desirable for modifying emulsified asphalt.
In order to solve the problem of difficult preparation of the SBS modified emulsified asphalt, a modification mode of firstly preparing the SBS into aqueous emulsion and then adding the SBS aqueous emulsion into the emulsified asphalt is developed in the prior art, so that the required SBS modified emulsified asphalt can be obtained, wherein the formation of the SBS aqueous emulsion and the performance thereof are key factors. At present, the common practice for preparing the required SBS aqueous emulsion is to dissolve SBS in a large amount of low-boiling organic solvent to obtain SBS organic solution, then to carry out emulsification treatment on the SBS organic solution, and then to remove the low-boiling organic solvent by heating and vacuum distillation to obtain the SBS aqueous emulsion. However, the preparation process of the method is complex, most of the adopted organic solvents contain toxicity and are volatile, so that the pollution is serious and the method is not friendly to the environment, the time consumption of the reduced pressure distillation process is long, the organic solvents are not completely evaporated, the defects of low solid content, easy demulsification and the like of the SBS aqueous emulsion are also caused, and the use performance is not ideal.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide an emulsified asphalt modifier, wherein the modifier is nonionic SBS aqueous emulsion, has the advantages of simple preparation process, environmental protection, high solid content, good stability and good compatibility with asphalt, and effectively solves the problems of unsatisfactory process and performance of the SBS aqueous emulsion in the prior art;
the second technical problem to be solved by the invention is to provide a preparation method of the emulsified asphalt modifier and application of the emulsified asphalt modifier in modifying emulsified asphalt.
In order to solve the problems, the emulsified asphalt modifier provided by the invention comprises the following raw material components in parts by weight: 25-30 parts of SBS, 15-25 parts of compatilizer, 35-50 parts of water, 1-2 parts of flowing agent and 5-8 parts of nonionic emulsifier.
Specifically, the SBS is a linear structure SBS.
Specifically, the molecular weight of SBS is lower than 30 ten thousand, and SBS1301 products are preferred.
Specifically, the compatilizer comprises aromatic hydrocarbon oil or naphthenic oil. The compatibilizing agents described above are preferably substances having a flash point of greater than 180 ℃, preferably naphthenic oils. Because the naphthenic oil is environment-friendly and has no toxic and side effects, the naphthenic oil has good plasticization and intersolubility with SBS, the SBS can be softened, the melting temperature of the SBS is reduced, the fluidity of the SBS melt is improved, and meanwhile, the naphthenic oil has good compatibility with the SBS and the asphalt, so that the compatibility of the SBS and the asphalt is improved, the SBS and the asphalt form a stable reticular structure, and the low-temperature and high-temperature performances of the SBS modified asphalt are improved.
Specifically, the flowing agent comprises fatty amide, preferably ethylenediamine bisstearamide, so that on one hand, the cohesion of the SBS melt can be reduced, the fluidity of the SBS melt can be improved, and on the other hand, the softening point of asphalt can be improved, and therefore the high-temperature performance of the asphalt can be improved.
Specifically, the nonionic emulsifier comprises a mixture of alkylphenol ethoxylates and castor oil ethoxylates. Preferably, the compound of the polyoxyethylene nonyl phenyl ether TX-15 and the polyoxyethylene castor oil ether EL-40, and more preferably, the compound ratio TX-15/EL-40 of the polyoxyethylene nonyl phenyl ether TX-15 and the polyoxyethylene castor oil ether EL-40 is 3:7-4:6.
the invention also discloses a method for preparing the emulsified asphalt modifier, which comprises the following steps:
(1) Uniformly mixing a selected amount of SBS, a compatilizer, a flowing agent and a part of nonionic emulsifier, and reacting at 180-185 ℃ in an inert atmosphere;
(2) Adding a selected amount of water into the rest nonionic emulsifier, and uniformly mixing until the nonionic emulsifier is fully dissolved to obtain an emulsifier aqueous solution for later use;
(3) Mixing the emulsifier aqueous solution with the reactant obtained in the step (1) and performing emulsification treatment to obtain the water-based emulsion.
Specifically, in the step (3), in the emulsification step, the emulsification rotation speed is controlled to be 6000-7000r/min, and the emulsification time is controlled to be 20-30min.
Specifically, in the step (2), the aqueous emulsifier solution is preferably heated to 95-100 ℃ to facilitate sufficient dissolution.
Specifically, in the step (1), the reaction is preferably performed under a nitrogen atmosphere.
Preferably, in the step (1) and the step (2), the amount ratio of the ionic emulsifier is preferably 2/3:1/3.
The invention also discloses application of the emulsified asphalt modifier in preparing emulsified asphalt.
The invention also discloses a modified method of the emulsified asphalt, which comprises the step of uniformly mixing the emulsified asphalt modifier and the emulsified asphalt;
the mass ratio of the emulsified asphalt modifier to the emulsified asphalt is 2-20:100.
the emulsified asphalt modifier takes SBS as a modified component, and forms water-soluble SBS emulsion by adding selected compatilizer, flowing agent and nonionic emulsifier. In the water-soluble SBS emulsion, the SBS content is higher, the property is stable, and the compatibility with asphalt is good, because the nonionic emulsifier is adopted as an emulsifying system, the water-soluble SBS emulsion can be compatible with nonionic emulsified asphalt and ionic emulsified asphalt, can be added into nonionic emulsified asphalt, cationic emulsified asphalt or anionic emulsified asphalt in a larger proportion, the high-temperature and low-temperature performances of asphalt can be obviously improved, and the application range of emulsified asphalt is widened.
The preparation method of the emulsified asphalt modifier does not need a large amount of solvent or distillation, is environment-friendly and energy-saving, and has the advantages of simple preparation process and easy operation.
Detailed Description
Example 1
The emulsified asphalt modifier comprises the following raw materials in parts by mass: 25 parts of SBS, 15 parts of naphthenic oil, 2 parts of ethylenediamine bisstearamide, 5 parts of nonionic emulsifier (polyoxyethylene nonylphenol ether TX-15.5 parts, polyoxyethylene castor oil ether EL-40.5 parts) and 35 parts of water.
Adding the SBS, naphthenic oil, ethylenediamine bisstearamide and 2/3 of nonionic emulsifier into a reaction kettle, introducing nitrogen into the kettle, and heating the mixture to 180-185 ℃ for reaction; adding the rest 1/3 of nonionic emulsifier into the water of the selected amount according to the proportion, heating to 95-100 ℃, uniformly dissolving the emulsifier, slowly adding the obtained emulsifier aqueous solution into a reaction kettle, stirring and emulsifying while adding, controlling the emulsifying speed to 7000r/min, and stopping emulsifying for 20min to obtain the SBS aqueous emulsion, namely the required emulsifying modifier.
Example 2
The emulsified asphalt modifier comprises the following raw materials in parts by mass: 30 parts of SBS, 25 parts of naphthenic oil, 1 part of ethylenediamine bisstearamide, 8 parts of a nonionic emulsifier (polyoxyethylene nonylphenol ether TX-15.2 parts, polyoxyethylene castor oil ether EL-40.4 parts) and 50 parts of water.
Adding the SBS, naphthenic oil, ethylenediamine bisstearamide and 2/3 of nonionic emulsifier into a reaction kettle, introducing nitrogen into the kettle, and heating the mixture to 180-185 ℃ for reaction; adding the rest 1/3 of nonionic emulsifier into the water of the selected amount according to the proportion, heating to 95-100 ℃, uniformly dissolving the emulsifier, slowly adding the obtained emulsifier aqueous solution into a reaction kettle, stirring and emulsifying while adding, controlling the emulsifying speed to 6000r/min, and stopping emulsifying for 30min to obtain the SBS aqueous emulsion, namely the required emulsifying modifier.
Example 3
The emulsified asphalt modifier comprises the following raw materials in parts by mass: 28 parts of SBS, 20 parts of naphthenic oil, 1.5 parts of ethylenediamine bisstearamide, 6.5 parts of nonionic emulsifier (polyoxyethylene nonylphenol ether TX-15.3 parts, polyoxyethylene castor oil ether EL-40.3.2 parts) and 42 parts of water.
Adding the SBS, naphthenic oil, ethylenediamine bisstearamide and 2/3 of nonionic emulsifier into a reaction kettle, introducing nitrogen into the kettle, and heating the mixture to 180-185 ℃ for reaction; adding the rest 1/3 of nonionic emulsifier into the water of the selected amount according to a proportion, heating to 95-100 ℃, uniformly dissolving the emulsifier, slowly adding the obtained emulsifier aqueous solution into a reaction kettle, stirring and emulsifying while adding, controlling the emulsifying speed to 6500r/min, emulsifying for 25min, and stopping emulsifying to obtain the SBS aqueous emulsion, namely the required emulsifying modifier.
Comparative example 1
The emulsified asphalt modifier scheme and the preparation method of the comparative example are the same as those of example 3, except that Tween-40 is selected as the nonionic emulsifier.
Comparative example 2
The emulsified asphalt modifier scheme and the preparation method of this comparative example are the same as in example 3, except that the flow agent is polyethylene wax.
Experimental example
The SBS aqueous emulsions prepared in examples 1 to 3 and comparative examples 1 to 2 were subjected to performance test, respectively, and the test results are shown in Table 1.
TABLE 1 Properties of SBS aqueous emulsion
Therefore, the SBS aqueous emulsion has higher SBS solid content and stable performance.
Application example
In order to illustrate that the SBS aqueous emulsion of the present invention has excellent modifying effect on emulsified asphalt, the following experiment was performed.
1. Emulsified asphalt modification
Directly adding the SBS aqueous emulsion prepared in the embodiment 3 into emulsified asphalt by adopting an additive method to prepare modified emulsified asphalt with different SBS contents; the modified emulsified asphalt with different SBR contents is prepared by adding the SBR latex which is a modifier commonly used in the market into the same emulsified asphalt matrix by adopting an additive method. The modified emulsified asphalt was subjected to performance test, and the results are shown in Table 2.
Table 2 modified emulsified asphalt Properties
According to JTG F40-2004 standard, the minimum softening point of the modified emulsified asphalt is not lower than 50 ℃, and the minimum ductility (5 ℃) is not lower than 20cm. As can be seen from Table 2, based on the same emulsified asphalt matrix, the SBS modified emulsified asphalt of the invention has particularly excellent high-temperature performance under the condition of the same additive amount of the modifier, and the low-temperature performance can still meet the technical index requirements although the low-temperature performance is different from the traditional SBR modified emulsified asphalt. Therefore, the SBS aqueous emulsion provided by the invention is used as an emulsified asphalt modifier, can greatly improve the high-temperature and low-temperature performances of asphalt, and better meets the current pavement construction requirements.
2. Modification of ion type emulsified asphalt
The SBS aqueous emulsion prepared in example 3 was directly added to different kinds of ion type emulsified asphalt at a ratio of 8% by the additive method, and the resulting modified emulsified asphalt was subjected to performance test, and the results are shown in Table 3.
TABLE 3 SBS emulsion addition to emulsified asphalt of different ionic types
| Type of emulsified bitumen | Nonionic type | Cationic type | Anionic type |
| Phenomenon (1) | Does not break emulsion | Does not break emulsion | Does not break emulsion |
As can be seen from the data in Table 3, the SBS aqueous emulsion can be added into emulsified asphalt of various ion types under the condition of relatively large addition amount of the SBS aqueous emulsion without demulsification, and has better stability. The application range is wider.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (10)
1. The emulsified asphalt modifier is characterized by comprising the following raw material components in parts by weight: 25-30 parts of SBS, 15-25 parts of compatilizer, 35-50 parts of water, 1-2 parts of flowing agent and 5-8 parts of nonionic emulsifier.
2. The emulsified asphalt modifier as set forth in claim 1, wherein the SBS is a linear structure SBS.
3. The emulsified asphalt modifier according to claim 1 or 2, wherein the molecular weight of SBS is below 30 ten thousand.
4. A emulsified asphalt modifier as set forth in any one of claims 1-3, wherein the compatibilizing agent comprises an aromatic or naphthenic oil.
5. The emulsified asphalt modifier as set forth in any one of claims 1-4, wherein the flow agent comprises a fatty amide.
6. The emulsified asphalt modifier as set forth in any one of claims 1-5, wherein the nonionic emulsifier comprises a mixture of alkylphenol ethoxylates and castor oil ethoxylates.
7. A process for preparing the emulsified asphalt modifier as set forth in any one of claims 1 to 6, comprising the steps of:
(1) Uniformly mixing a selected amount of SBS, a compatilizer, a flowing agent and a part of nonionic emulsifier, and reacting at 180-185 ℃ in an inert atmosphere;
(2) Adding a selected amount of water into the rest nonionic emulsifier, and uniformly mixing until the nonionic emulsifier is fully dissolved to obtain an emulsifier aqueous solution for later use;
(3) Mixing the emulsifier aqueous solution with the reactant obtained in the step (1) and performing emulsification treatment to obtain the water-based emulsion.
8. The method for preparing an emulsified asphalt modifier according to claim 7, wherein in the step (3), the emulsification rotation speed is controlled to be 6000-7000r/min and the emulsification time is controlled to be 20-30min.
9. Use of the emulsified asphalt modifier according to any one of claims 1 to 6 for preparing emulsified asphalt.
10. A method for modifying emulsified asphalt, comprising the step of uniformly mixing the emulsified asphalt modifier according to any one of claims 1 to 6 with emulsified asphalt;
the mass ratio of the emulsified asphalt modifier to the emulsified asphalt is 2-20:100.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111265771.XA CN116041971B (en) | 2021-10-28 | Emulsified asphalt modifier and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111265771.XA CN116041971B (en) | 2021-10-28 | Emulsified asphalt modifier and preparation method and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN116041971A true CN116041971A (en) | 2023-05-02 |
| CN116041971B CN116041971B (en) | 2024-05-17 |
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