CN115160811A - Super-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt - Google Patents
Super-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt Download PDFInfo
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- CN115160811A CN115160811A CN202210971981.9A CN202210971981A CN115160811A CN 115160811 A CN115160811 A CN 115160811A CN 202210971981 A CN202210971981 A CN 202210971981A CN 115160811 A CN115160811 A CN 115160811A
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- rubber powder
- asphalt
- epoxy
- desulfurized
- modified asphalt
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- 239000010426 asphalt Substances 0.000 title claims abstract description 102
- 239000000843 powder Substances 0.000 title claims abstract description 66
- 239000004593 Epoxy Substances 0.000 title claims abstract description 62
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 28
- 239000003822 epoxy resin Substances 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000011159 matrix material Substances 0.000 claims abstract description 13
- 239000002699 waste material Substances 0.000 claims abstract description 12
- 238000010008 shearing Methods 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 22
- XKZQKPRCPNGNFR-UHFFFAOYSA-N 2-(3-hydroxyphenyl)phenol Chemical compound OC1=CC=CC(C=2C(=CC=CC=2)O)=C1 XKZQKPRCPNGNFR-UHFFFAOYSA-N 0.000 claims description 13
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 claims description 11
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical group CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 claims description 11
- 239000001294 propane Substances 0.000 claims description 11
- 238000006477 desulfuration reaction Methods 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- 238000011161 development Methods 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000010920 waste tyre Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 14
- 239000003607 modifier Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000023556 desulfurization Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 239000011384 asphalt concrete Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009477 glass transition Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009864 tensile test Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Images
Classifications
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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
Abstract
An ultra-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt. The super-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt comprises, by weight, 10-50 parts of highly desulfurized waste rubber powder, 100 parts of No. 70 matrix asphalt, 57-78 parts of epoxy resin and 53-72 parts of a curing agent. Mixing the preheated matrix asphalt with the highly desulfurized rubber powder, heating to 180-200 ℃, and shearing for 30-50min; cooling to 150-170 deg.C, and continuously shearing for 15-20min; and (3) uniformly mixing the epoxy resin and the curing agent, adding the mixture into the desulfurized rubber powder modified asphalt at the temperature of 150-170 ℃, and stirring to obtain the modified asphalt. The high-degree desulfurized rubber powder has good compatibility with asphalt, and the obtained modified asphalt has excellent flexibility at low temperature, so that the dilemma that the epoxy asphalt mixture for the steel bridge deck is easy to crack at low temperature is effectively solved; meanwhile, the high-doping-amount rubber powder can promote the recycling of waste rubber powder, is environment-friendly and reduces the cost.
Description
Technical Field
The invention belongs to the technical field of high polymer materials and preparation thereof, and particularly relates to ultra-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt.
Background
Epoxy asphalt is a multiphase composite material formed by the curing reaction of epoxy resin and a curing agent and the mixing of the epoxy resin, asphalt and other additives in proportion, and is a main material for paving steel bridge deck due to high strength and good durability. However, the common epoxy asphalt has higher rigidity and poor capability of coordinating deformation with a steel bridge deck, is easy to generate low-temperature cracking and fatigue cracking, and greatly limits the engineering application. Meanwhile, the construction of the oversized span bridge has higher requirement on the flexibility of the paved asphalt concrete, so that the toughness of the existing epoxy asphalt concrete needs to be improved urgently.
The prior invention patents at home and abroad propose preparation processes for improving the flexibility of an epoxy asphalt system, such as CN105838094B, CN101255277B, CN105038141B and the like, but all have the defects of various raw materials and complex preparation process, and are separated from the practical construction. At present, SBS modified asphalt is often adopted in engineering to improve the toughness of epoxy asphalt, but the improvement effect on the toughness of an epoxy system is insufficient due to the fact that the addition amount of SBS in the asphalt is small. Therefore, the development of the super-toughness epoxy asphalt has great significance for the development of the epoxy asphalt used for steel bridge decks or airport pavement.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the ultra-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt, which solves the problems that the existing epoxy asphalt is easy to crack at low temperature and fatigue.
In order to solve the problems of the prior art, the technical scheme adopted by the invention is as follows:
an ultra-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt comprises the following components in parts by weight:
10-50 parts of high-desulfurization waste rubber powder,
100 parts of No. 70 matrix asphalt,
57-78 parts of epoxy resin,
53-72 parts of a curing agent;
the high-desulfurization waste rubber powder is 40-mesh rubber powder extruded by a double-screw extrusion method by using waste tire rubber;
the preparation method of the super-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt comprises the following steps:
step 1, mixing matrix asphalt preheated to 160 ℃ with highly desulfurized rubber powder, heating to 180-200 ℃, and shearing at the rotating speed of 4000-6000r/min for 30-50min;
step 2, reducing the temperature to 150-170 ℃, and shearing at the speed of 2000-3000r/min for 15-20min so as to facilitate the full development of asphalt and keep the temperature for later use;
and 3, uniformly mixing the epoxy resin and the curing agent, adding the mixture into the desulfurized rubber powder modified asphalt obtained in the step 2, and stirring to obtain the ultra-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt.
Further, the Mooney viscosity value of the highly desulfurized waste rubber powder is lower than ML40, the tensile strength is higher than 5Mpa, and the elongation at break is higher than 200%.
Further, the parameters of the twin-screw extrusion method are as follows: the temperature of the screw is 160-180 ℃, the rotation speed ratio is 3.5, and the rotation speed of the screw is 150-300r/min.
Further, the 70# base asphalt is alpha 70# base asphalt.
Furthermore, the epoxy resin is one or a mixture of two of domestic diphenol propane glycidyl ether resin and diphenol methane glycidyl ether resin.
Further, the curing agent is phthalic anhydride curing agent.
Has the advantages that:
compared with the prior art, the ultra-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt provided by the invention has the following advantages:
(1) The desulfurization rubber powder adopted by the invention is prepared from waste rubber by a screw extrusion method, and the desulfurization process improves the mixing amount of the rubber powder in the asphalt and has obvious environmental and economic benefits.
(2) The invention adopts the high-degree desulfurized rubber powder, which can obviously improve the toughness of the epoxy asphalt system and effectively improve the low-temperature crack resistance and fatigue crack resistance of the epoxy asphalt mixture. The secondary transition temperature theory states that polymer toughness is related to the secondary transition temperature. The lower the glass transition temperature, the better the toughness of the material. Because the glass transition temperature of the waste rubber powder is lower than that of the asphalt, the mixing of the rubber powder enhances the flexibility of the epoxy asphalt binder, and the mixing amount of the rubber powder is increased after high-degree desulfurization, so that the improvement effect on the toughness of the asphalt is more remarkable. On the other hand, due to the thermosetting characteristic of the epoxy resin, the defect that the high-temperature performance of the desulfurized rubber powder modified asphalt is insufficient can be effectively overcome, and the desulfurized rubber powder modified asphalt are modified mutually, so that the epoxy asphalt with excellent high-temperature and low-temperature performance can be prepared. Tensile tests show that the tensile strength and the elongation at break of the epoxy desulfurized rubber powder modified asphalt are obviously superior to those of common domestic epoxy asphalt, wherein the tensile strength of the epoxy asphalt prepared by the invention is more than 1.5 times of that of common domestic epoxy asphalt, and the elongation at break of the epoxy asphalt is more than 2 times of that of domestic epoxy asphalt.
(3) The high-desulfurization degree rubber powder has obvious effect of reducing the viscosity of the asphalt, so that the epoxy asphalt has longer retention time and is beneficial to construction.
(4) The epoxy asphalt processing material is easy to obtain, the preparation method is simple, the operation time is short, the pavement construction quality can be effectively ensured, and the application and popularization of construction are facilitated.
Drawings
FIG. 1 is a process flow chart for preparing ultra-tough environment-friendly epoxy desulfurized rubber powder modified asphalt.
Detailed Description
Example 1
The material composition is as follows:
asphalt: 100 parts of alpha 70# base asphalt;
modifying agent: 10 parts of highly desulfurized rubber powder, wherein the highly desulfurized waste rubber powder is rubber powder extruded by a double-screw extrusion method by using waste tire rubber, and the parameters of the double-screw extrusion method are as follows: the screw temperature is 170 ℃, the rotation speed ratio is 3.5, the screw rotation speed is 200r/min, the Mooney viscosity value ML35 of the high-desulfurization waste rubber powder is obtained, the tensile strength is 5.4Mpa, and the elongation at break is 230 percent
Epoxy resin: 57 parts of domestic diphenol propane glycidyl ether resin;
curing agent: 53 parts of phthalic anhydride curing agent.
The epoxy desulfurized rubber powder modified asphalt is prepared by the following steps:
(1) Mixing the matrix asphalt preheated to 160 ℃ with the desulfurized rubber powder, heating to 190 ℃, and shearing at the rotating speed of 5000r/min for about 40min;
(2) Cooling the product obtained in the step (1) to 160 ℃, and shearing at the speed of 3000r/min for 15min to ensure that the asphalt is fully developed;
(3) And (3) uniformly mixing the epoxy resin and the curing agent, adding the mixture into the desulfurized rubber powder modified asphalt at the temperature of 170 ℃, and stirring for 5min to obtain the asphalt.
Example 2
The difference from the example 1 is that the highly desulfurized rubber powder comprises 20 parts of domestic diphenol propane glycidyl ether resin, 62 parts of phthalic anhydride curing agent.
The preparation method is the same as example 1.
Example 3
The difference from the example 1 is that 30 parts of highly desulfurized rubber powder, 67 parts of domestic diphenol propane glycidyl ether resin and 63 parts of phthalic anhydride curing agent.
The preparation method is the same as example 1.
Example 4
The difference from the example 1 is that 40 parts of highly desulfurized rubber powder, 73 parts of domestic diphenol propane glycidyl ether resin and 67 parts of phthalic anhydride curing agent.
Example 5
The difference from the example 1 is that 50 parts of highly desulfurized rubber powder, 78 parts of domestic diphenol propane glycidyl ether resin and 72 parts of phthalic anhydride curing agent.
Comparative example 1
The difference from example 1 is that, without addition of a modifier, the material composition is as follows:
asphalt: 100 parts of alpha 70# matrix asphalt;
epoxy resin: 52 parts of domestic diphenol propane glycidyl ether resin;
curing agent: 48 parts of phthalic anhydride curing agent.
The preparation process of the epoxy asphalt comprises the following steps:
and (3) uniformly mixing the epoxy resin and the curing agent, adding the mixture into matrix asphalt at 160 ℃, and stirring for 5min to obtain the epoxy resin-modified asphalt.
Comparative example 2
The difference from example 1 is that the additive is selected as linear SBS modifier model YH-791 from the petrochemical production of holy, the material composition of which is as follows:
asphalt: 100 parts of alpha 70# base asphalt;
modifying agent: 3 parts of a linear SBS modifier;
epoxy resin: 53 parts of domestic diphenol propane glycidyl ether resin;
curing agent: 50 parts of phthalic anhydride curing agent.
The preparation method of the epoxy asphalt comprises the following steps:
(1) Mixing the matrix asphalt preheated to 160 ℃ with SBS, heating to 180 ℃, and shearing at the rotation speed of 4000r/min for 40min;
(2) Cooling the product obtained in the step (1) to 160 ℃, and shearing at the speed of 2000r/min for 15min to obtain SBS modified asphalt;
(3) And (3) uniformly mixing the epoxy resin and the curing agent, adding the mixture into SBS modified asphalt at 165 ℃, and stirring for 5min to obtain the epoxy resin modified asphalt.
Comparative example 3
The difference from comparative example 2 is 5 parts of linear SBS modifier, 54 parts of domestic diphenol propane glycidyl ether resin and 51 parts of phthalic anhydride curing agent.
The preparation method is the same as that of comparative example 2.
Comparative example 4
The difference from comparative example 2 is that the linear SBS modifier is 7 parts, the domestic diphenol propane glycidyl ether resin is 55 parts, and the phthalic anhydride curing agent is 52 parts.
The preparation method is the same as that of comparative example 2.
Examples 1-5 are epoxy asphalts prepared using the highly devulcanized rubber powder of the present invention; comparative example 1 is an epoxy asphalt prepared using a base asphalt; comparative examples 2-4 are epoxy asphalts prepared using SBS modified asphalt. Tensile tests were carried out according to the specification GB/T16777-2008, and the tensile strengths and elongations at break at-10 ℃ and 23 ℃ of examples 1 to 5 and comparative examples 1 to 4 are summarized in Table 1.
TABLE 1 summary of tensile Property results for examples and comparative examples
As can be seen from the data in the table, the super-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt has the following advantages:
(1) Compared with the tensile property of the epoxy asphalt in the comparative examples 1 to 4 at the temperature of-10 ℃ and the tensile property at the temperature of 23 ℃, the high-degree desulfurized rubber powder has obvious advantages in toughening effect of the epoxy asphalt compared with SBS asphalt, and the tensile strength and the elongation at break of the examples 1 to 5 at low temperature and normal temperature are far higher than the requirements of the design and construction technical specification of pavement of steel bridge pavement of roads (JTGT 3364-02-2019) that the tensile strength is not lower than 2.0MPa and the elongation at break is not lower than 100 percent, so that the ultra-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt provided by the invention has excellent low-temperature crack resistance.
(2) Although the tensile strength of the epoxy asphalt in the comparative examples 1 to 4 meets the standard requirement, the elongation at break is generally low, and the epoxy asphalt reflects the characteristics of large rigidity and poor flexibility of the domestic epoxy.
(3) The tensile properties of the epoxy desulfurized rubber powder modified asphalt and the epoxy SBS modified asphalt are improved along with the increase of the mixing amount of the modifier. But because the price of the SBS modifier is high, the production cost is increased by increasing the SBS mixing amount, and the price of the desulfurized rubber powder is far lower than that of the matrix asphalt, the production cost of the epoxy asphalt can be effectively reduced by increasing the mixing amount of the desulfurized rubber powder.
In conclusion, the epoxy asphalt prepared by the high-degree desulfurized rubber powder has obvious environmental protection and economic significance, the epoxy asphalt has simple preparation process and excellent tensile property, shows super-strong flexibility under the low-temperature condition, can effectively solve the dilemma that the prior epoxy asphalt mixture for the steel bridge deck is easy to crack at low temperature, and has important significance for the application of domestic epoxy in the pavement of the steel bridge deck.
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. All the components not specified in this embodiment can be implemented by the prior art.
Claims (6)
1. The super-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt is characterized by comprising the following components in parts by weight:
10-50 parts of high-desulfurization waste rubber powder,
100 parts of No. 70 matrix asphalt,
57-78 parts of epoxy resin,
53-72 parts of a curing agent;
the highly desulfurized waste rubber powder is rubber powder extruded by a double-screw extrusion method by using waste tire rubber;
the preparation method of the super-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt comprises the following steps:
step 1, mixing matrix asphalt preheated to 160 ℃ with highly desulfurized rubber powder, heating to 180-200 ℃, and shearing at the rotating speed of 4000-6000r/min for 30-50min;
step 2, reducing the temperature to 150-170 ℃, and shearing at the speed of 2000-3000r/min for 15-20min so as to facilitate the full development of asphalt and keep the temperature for later use;
and 3, uniformly mixing the epoxy resin and the curing agent, adding the mixture into the desulfurized rubber powder modified asphalt obtained in the step 2, and stirring to obtain the ultra-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt.
2. The ultra-tough environment-friendly epoxy desulfurized rubber powder modified asphalt as claimed in claim 1, wherein the Mooney viscosity value of the highly desulfurized waste rubber powder is lower than ML40, the tensile strength is greater than 5MPa, and the elongation at break is greater than 200%.
3. The ultra-tough environment-friendly epoxy desulfurized rubber powder modified asphalt according to claim 1, wherein the parameters of the twin-screw extrusion method are as follows: the temperature of the screw is 160-180 ℃, the rotation speed ratio is 3.5, and the rotation speed of the screw is 150-300r/min.
4. The environment-friendly ultra-tough epoxy desulfurized rubber powder modified asphalt as claimed in claim 1, wherein said No. 70 matrix asphalt is alpha No. 70 matrix asphalt.
5. The ultra-tough environment-friendly epoxy desulfurized rubber powder modified asphalt according to claim 1, wherein the epoxy resin is one or a mixture of two of a domestic diphenol propane glycidyl ether resin and a diphenol methane glycidyl ether resin.
6. The ultra-tough environment-friendly epoxy desulfurized rubber powder modified asphalt as claimed in claim 1, wherein the curing agent is phthalic anhydride curing agent.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210971981.9A CN115160811A (en) | 2022-08-13 | 2022-08-13 | Super-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210971981.9A CN115160811A (en) | 2022-08-13 | 2022-08-13 | Super-toughness environment-friendly epoxy desulfurized rubber powder modified asphalt |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441005A (en) * | 2003-03-31 | 2003-09-10 | 武汉理工大学 | Asphalt modified with desulfurized rubber powder |
| CN104448457A (en) * | 2014-12-12 | 2015-03-25 | 上海仁聚新材料科技有限公司 | Rubber-plastic composite asphalt modifier, rubber-plastic composite modified asphalt and preparation method of rubber-plastic composite modified asphalt |
| CN112251036A (en) * | 2020-10-23 | 2021-01-22 | 山东大学 | Waste SBS (styrene butadiene styrene) modified asphalt regenerant and preparation method and application thereof |
| CN113072817A (en) * | 2021-05-10 | 2021-07-06 | 江阴泰富沥青有限公司 | Epoxy rubber composite modified asphalt and preparation method thereof |
| CN113214667A (en) * | 2021-05-31 | 2021-08-06 | 海南恒建沥青路面有限公司 | Modified asphalt and preparation method thereof |
| CN114395267A (en) * | 2022-03-28 | 2022-04-26 | 中路交建(北京)工程材料技术有限公司 | Epoxy asphalt and preparation method and application thereof |
-
2022
- 2022-08-13 CN CN202210971981.9A patent/CN115160811A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441005A (en) * | 2003-03-31 | 2003-09-10 | 武汉理工大学 | Asphalt modified with desulfurized rubber powder |
| CN104448457A (en) * | 2014-12-12 | 2015-03-25 | 上海仁聚新材料科技有限公司 | Rubber-plastic composite asphalt modifier, rubber-plastic composite modified asphalt and preparation method of rubber-plastic composite modified asphalt |
| CN112251036A (en) * | 2020-10-23 | 2021-01-22 | 山东大学 | Waste SBS (styrene butadiene styrene) modified asphalt regenerant and preparation method and application thereof |
| CN113072817A (en) * | 2021-05-10 | 2021-07-06 | 江阴泰富沥青有限公司 | Epoxy rubber composite modified asphalt and preparation method thereof |
| CN113214667A (en) * | 2021-05-31 | 2021-08-06 | 海南恒建沥青路面有限公司 | Modified asphalt and preparation method thereof |
| CN114395267A (en) * | 2022-03-28 | 2022-04-26 | 中路交建(北京)工程材料技术有限公司 | Epoxy asphalt and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| 赵安东等: "不同脱硫度橡胶对橡胶改性沥青性能的影响及应用", 《特种橡胶制品》 * |
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Application publication date: 20221011 |