CN114133620A - Activated rubber powder, preparation method, composition containing activated rubber powder and stable environment-friendly rubber asphalt - Google Patents
Activated rubber powder, preparation method, composition containing activated rubber powder and stable environment-friendly rubber asphalt Download PDFInfo
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- CN114133620A CN114133620A CN202111389803.7A CN202111389803A CN114133620A CN 114133620 A CN114133620 A CN 114133620A CN 202111389803 A CN202111389803 A CN 202111389803A CN 114133620 A CN114133620 A CN 114133620A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
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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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2319/00—Characterised by the use of rubbers not provided for in groups C08J2307/00 - C08J2317/00
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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
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- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention provides activated rubber powder, a preparation method, a composition containing the activated rubber powder and stable environment-friendly rubber asphalt. The preparation method of the activated rubber powder comprises the following steps: and (3) carrying out desulfurization treatment on the waste tire rubber powder to obtain a desulfurization product, wherein the temperature of the desulfurization treatment is 200-300 ℃. The waste tire rubber powder is desulfurized at a higher temperature, so that the desulfurization time can be shortened; and the waste tire rubber powder can be in a phase change inflection point of changing an elastomer into a plastic state, and the activated rubber powder with good storage stability, uniform granularity and high utilization rate is obtained. The activated rubber powder and the matrix asphalt have better viscosity and are dispersed more uniformly. When the rubber asphalt is prepared, the rubber asphalt is not easy to separate out of matrix asphalt, irritant gas is not released, the performance is more stable, and the rubber asphalt has better anti-aging performance. In addition, the process for preparing the rubber asphalt by adopting the activated rubber powder also has the advantages of simplicity, easiness in operation, low energy consumption, high environmental friendliness and the like.
Description
Technical Field
The invention relates to the field of rubber asphalt preparation, and in particular relates to activated rubber powder, a preparation method, a composition containing the activated rubber powder and stable environment-friendly rubber asphalt.
Background
The field modified rubber asphalt (wet method) technology is introduced into China from the first time, the industrialization promotion is also over 15 years, the technology has social significance of resource recycling and prominent technical significance of crack resistance, low noise and the like, and the technology is accepted by the industry. However, the rubber asphalt butted in place does not go into a channel of continuous scale development as expected. The reasons are four in general: the equipment threshold is high, the project threshold is high, and the method is suitable for butt joint of large-scale mixing stations (the output of an intermittent mixing plant is relatively low), and if a small/temporary project or a mixing station is butt joint, the one-time investment cost is relatively high; secondly, the hardware and the supply mode are incompatible with the traditional asphalt supplier, and the participation support of the traditional channel can not be obtained; thirdly, the finished product is unstable in storage and property, depends on strict process control, has high quality supervision difficulty, and seriously influences the decision of large-scale application; fourthly, the vulcanized rubber asphalt is flammable at high temperature in the production and processing process, the exhaust emission exceeds the standard, and the requirements of safety and environmental protection are not met.
On the other hand, a dry-method direct-casting technical route is developed. In local areas or projects, dry modification has been used to some extent, but, like wet modification, the dry technical route also suffers from serious sustainable development problems, mainly including: first, the mixing time of crumb rubber and asphalt is too short, the modification efficacy and effectiveness is limited, and the lack of direct monitoring of efficacy and effectiveness can cause performance defects or concerns. Secondly, the additive is generally additionally built into a sale channel, which is much more complex than the channel for supplying asphalt, more intermediate links and small amount of additive, so that the sale cost is high, and the total cost obviously exceeds that of SBS modified asphalt. And thirdly, a dry process is adopted, the quality control link increases the work of acceptance of the additive and supervision of the addition link, so that the problems of poor addition and insufficient addition are serious.
The instability of the rubber asphalt in performance is mainly shown in two aspects, one is that the rubber powder is not uniformly and stably dispersed in the asphalt, and is easy to segregate in the storage and transportation process, so that the distribution of the rubber powder on a road surface is not uniform, and the rubber powder is easy to damage in an area where the rubber powder is excessively concentrated; and secondly, the adhesive strength of the rubber powder and the asphalt is insufficient, so that the rubber powder particles and the asphalt are easily broken along the adhesive surface under the actions of alternation of dryness and humidity, sudden temperature change and long-term repeated action of vehicle load, the rubber particles are separated from the asphalt mixture and are dissociated on the road surface, the adverse effect is generated on the braking of the vehicle, the road surface porosity is increased, cracks are easily generated, the water erosion damage is aggravated, and the anti-aging performance of the asphalt is reduced. Therefore, the traditional technology of modifying asphalt by waste rubber powder is still not mature, and a plurality of problems need to be solved.
In view of the above problems, it is desirable to provide a method for preparing rubber asphalt with stable and environment-friendly properties.
Disclosure of Invention
The invention mainly aims to provide activated rubber powder, a preparation method, a composition containing the activated rubber powder and stable environment-friendly rubber asphalt, so as to solve the problems of poor stability, high energy consumption of a preparation process and environmental pollution of the conventional rubber asphalt.
In order to achieve the above object, the present invention provides, in one aspect, a method for preparing activated rubber powder, the method comprising: and (3) carrying out desulfurization treatment on the waste tire rubber powder to obtain a desulfurization product, wherein the temperature of the desulfurization treatment is 200-300 ℃.
Further, the step of desulfurization treatment comprises: under the heating condition, shearing, plasticizing and extruding the waste tire rubber powder in a plasticizer to obtain a desulfurization product; preferably, the shearing rate of the shearing process is 40-80 rpm/min.
Furthermore, the particle size of the waste tire rubber powder is 10-40 meshes.
Further, the preparation method of the active rubber powder also comprises the step of adding a stabilizing activator in the desulfurization process; preferably, the activated rubber powder stabilizing activator is one or more selected from the group consisting of rubber oil, plant extract oil and furfural extract oil.
Further, the amount of the stabilizing activator is 1-10% in percentage by weight of the rubber powder of the waste tire.
In order to achieve the purpose, the invention also provides activated rubber powder which is prepared by the preparation method of the activated rubber powder.
In order to achieve the above object, the present invention also provides a composition for preparing a stable and environment-friendly rubberized asphalt, the composition for preparing a stable and environment-friendly rubberized asphalt comprising: the asphalt comprises matrix asphalt, activated rubber powder and a stabilizer, wherein the activated rubber powder is the activated rubber powder provided by the application.
Further, the composition for preparing the stable environment-friendly rubber asphalt comprises, by weight, 50-80 parts of matrix asphalt, 20-47 parts of activated rubber powder and 0.1-3 parts of a stabilizer.
Further, the stabilizer is sulfur.
In order to achieve the above object, the invention further provides a stable environment-friendly rubber asphalt prepared from the composition for preparing the stable environment-friendly rubber asphalt.
By applying the technical scheme of the invention, no water is used as a working medium in the desulfurization process, no steam pressure is generated, and the deformation of a container structure and unsafe factors in the use process of the pressure container caused by the continuous high-low temperature alternating environment of the dynamic desulfurization tank are avoided. Compared with the existing desulfurization temperature, the desulfurization treatment is carried out on the waste tire rubber powder at a higher temperature, so that the desulfurization time can be shortened; meanwhile, at the temperature, the waste tire rubber powder can be in a phase change inflection point (namely a positive desulfurization point for rubber activation regeneration) for changing an elastomer into a plastic state, and the activated rubber powder with good storage stability, uniform granularity and high utilization rate is obtained. Meanwhile, the activated rubber powder and the matrix asphalt subsequently used for preparing the rubber asphalt have better viscosity and are dispersed more uniformly. Therefore, when the activated rubber powder is used for preparing the rubber asphalt, the activated rubber powder is not easy to separate out of the matrix asphalt, does not release irritant gas, and has more stable performance and better ageing resistance. In addition, the process for preparing the rubber asphalt by adopting the activated rubber powder also has the advantages of simplicity, easiness in operation, low energy consumption, high environmental friendliness and the like.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail with reference to examples.
As described in the background art, the existing rubber asphalt has the problems of poor stability, high energy consumption of the preparation process and environmental pollution. In order to solve the technical problems, the application provides a preparation method of activated rubber powder, which comprises the following steps: carrying out desulfurization treatment on the waste tire rubber powder to obtain a desulfurization product, wherein the temperature of the desulfurization treatment is 200-300 ℃; the desulfurization product reacts and is blended with a stable activator and a density regulator to obtain the activated rubber powder.
In the desulfurization process, no water is used as a working medium, no steam pressure is generated, and the deformation of a container structure and unsafe factors in the use process of the pressure container caused by the continuous high-low temperature alternating environment of the dynamic desulfurization tank are avoided. Compared with the existing desulfurization temperature, the desulfurization treatment is carried out on the waste tire rubber powder at a higher temperature, so that the desulfurization time can be shortened; meanwhile, at the temperature, the waste tire rubber powder can be in a phase change inflection point (namely a positive desulfurization point for rubber activation regeneration) for changing an elastomer into a plastic state, and the activated rubber powder with good storage stability, uniform granularity and high utilization rate is obtained. Meanwhile, the activated rubber powder and the matrix asphalt subsequently used for preparing the rubber asphalt have better viscosity and are dispersed more uniformly. Therefore, when the activated rubber powder is used for preparing the rubber asphalt, the activated rubber powder is not easy to separate out of the matrix asphalt, does not release irritant gas, and has more stable performance and better ageing resistance. In addition, the process for preparing the rubber asphalt by adopting the activated rubber powder also has the advantages of simplicity, easiness in operation, low energy consumption, high environmental friendliness and the like.
In a preferred embodiment, the step of performing the desulfurization treatment includes: under the heating condition, the waste tire rubber powder is sheared and plasticized in a plasticizer and extruded by a double screw to obtain a desulfurization product. By adopting a normal-pressure sulfur-breaking plasticizing process and a unique double-spiral self-cleaning control method, the unsafe problem caused by high temperature and high pressure of the traditional activation regeneration and the problem of secondary environmental pollution caused by waste water and waste gas are solved, and low-carbon manufacturing, clean production and green development are realized. Preferably, the shearing rate of the shearing process is 40-80 rpm/min. The shear rate includes, but is not limited to, the above range, and limiting the shear rate within the above range is advantageous for further improving the desulfurization efficiency, thereby being advantageous for reducing the pungent odor of the subsequently prepared rubber asphalt and improving the environmental friendliness and stability thereof.
In order to further improve the activation efficiency, the particle size of the waste tire powder can be appropriately adjusted, and preferably, the particle size of the waste tire powder is 10 to 40 meshes.
The rubber powder of the waste tire used in the application is rubber particles obtained by crushing and screening the waste tire in sequence.
In a preferred embodiment, the preparation method of the activated rubber powder further comprises the step of adding a stabilizing activator in the desulfurization process. The addition of the stabilizing active agent in the desulfurization process can enable the stabilizing active agent to react and blend with the desulfurized rubber powder, thereby being beneficial to further improving the stability of the activated rubber powder and the mixing uniformity and viscosity of the activated rubber powder and the matrix asphalt in the application process.
In a preferred embodiment, the stabilizing activators include, but are not limited to, one or more of rubber oil, plant extract oil, and furfural extract oil. Compared with other stabilizing activators, the stabilizing activators are beneficial to further improving the stability of the activated rubber powder. Preferably, the amount of the stabilizing activator is 1-10% in percentage by weight of the rubber powder of the waste tire.
The second aspect of the application also provides activated rubber powder prepared by the preparation method of the activated rubber powder.
When the activated rubber powder is used for preparing rubber asphalt, the activated rubber powder is not easy to separate out of matrix asphalt, and irritant gas is not released, so that the performance is more stable, and the rubber asphalt has better ageing resistance. In addition, the process for preparing the rubber asphalt by adopting the activated rubber powder also has the advantages of simplicity, easiness in operation, low energy consumption, high environmental friendliness and the like.
The third aspect of the present application also provides a composition for preparing a stable and environment-friendly rubberized asphalt, the composition for preparing a stable and environment-friendly rubberized asphalt comprising: the asphalt comprises matrix asphalt, activated rubber powder, a stabilizer and a heat-conducting solvent, wherein the activated rubber powder is the activated rubber powder provided by the application.
Because the activated rubber powder provided by the application has higher stability and can be well dispersed in the matrix asphalt, the rubber asphalt prepared by the activated rubber powder, the matrix asphalt, the stabilizer and the heat-conducting solvent has better stability and aging resistance, and is environment-friendly and lower in process energy consumption. In addition, the preparation process can be carried out at a lower temperature (50 ℃ lower than that of the prior art), no irritant gas is discharged, the performance is still stable after long-distance transportation, and the product meets related requirements.
In order to further improve the comprehensive performance of the stable environment-friendly rubber asphalt, the composition for preparing the stable environment-friendly rubber asphalt preferably comprises 50-80 parts by weight of matrix asphalt, 20-47 parts by weight of activated rubber powder and 0.1-3 parts by weight of stabilizer.
The stabilizer used for stabilizing the environment-friendly rubber asphalt can be selected from the types commonly used in the field. Preferably, the stabilizer includes, but is not limited to, sulfur.
The composition of the base asphalt is also important in order to prepare a rubberized asphalt having more excellent properties. Preferably, the composition of the base asphalt comprises: medium petroleum grade 70A asphalt, medium petrochemical grade 70A asphalt and Shell No. 70 asphalt.
The fourth aspect of the present application provides a stable environment-friendly rubber asphalt, which is prepared from the composition for preparing the stable environment-friendly rubber asphalt provided by the present application.
Because the activated rubber powder provided by the application has higher stability and can be well dispersed in the matrix asphalt, the rubber asphalt prepared by the activated rubber powder, the matrix asphalt, the stabilizer and the heat-conducting solvent has better stability and aging resistance, and is environment-friendly and lower in process energy consumption.
In addition, the application also provides a preparation method of the preferable stable environment-friendly rubber asphalt, which comprises the following steps: heating the asphalt to a preset temperature through heat conducting oil, adding activated rubber powder during stirring, and then adding a stabilizer after grinding for a preset time by using a colloid mill to obtain the required stable environment-friendly rubber asphalt. Preferably, the predetermined temperature is 130 to 170 ℃, and the grinding time is 30 to 60 min.
In the preparation method, electromagnetic heating and a boiler heat conduction oil system are used together, so that the conversion consumption of water and vapor phase heat energy in the traditional method is avoided, the power consumption of each ton of rubber powder is about 200 ℃, and compared with a dynamic method, the energy can be saved by about 20%. By adopting a normal-pressure sulfur-breaking plasticizing process and a unique double-spiral self-cleaning control method, the unsafe problem caused by high temperature and high pressure of the traditional activation regeneration and the problem of secondary environmental pollution caused by waste water and waste gas are solved, and low-carbon manufacturing, clean production and green development are realized.
The present application is described in further detail below with reference to specific examples, which should not be construed as limiting the scope of the invention as claimed.
Example 1
Preparation of activated rubber powder:
heating a Jinshan rubber and plastic 15 type special rubber powder plasticizing machine to 260 ℃, taking 500Kg of 20-mesh rubber powder of a waste tire, putting the waste tire into a feeding hopper, spirally adjusting the feeding speed to 30rpm, adjusting the plasticizing machine to 60rpm, continuously plasticizing, preparing activated rubber powder, and cooling for later use. Wherein the stabilizing activator is furfural extract oil produced by Wuhan Kangrun petrochemical industry Limited liability company.
Preparing stable environment-friendly rubber asphalt:
taking 20Kg of No. 70 asphalt (medium petrochemical No. 70 asphalt, the production place is Guangdi petrochemical), heating the asphalt to 140 ℃ through heat conduction oil, stirring, adding 8Kg of activated rubber powder, grinding for 30min through a colloid mill, stirring for 45min, adding 0.24Kg of stabilizer, and stirring for 50min to obtain the product.
Example 2
The differences from example 1 are: in the preparation process of the activated rubber powder, the temperature of a plasticizing machine is 200 ℃.
Example 3
The differences from example 1 are: in the preparation process of the activated rubber powder, the temperature of a plasticizing machine is 300 ℃.
Example 4
The differences from example 1 are: during the preparation of the activated rubber powder, the shear rate was 40 rpm.
Example 5
The differences from example 1 are: during the preparation of the activated rubber powder, the shear rate is 80 rpm.
Example 6
The differences from example 1 are: during the preparation of the activated rubber powder, the shear rate is 90 rpm.
Example 7
The differences from example 1 are: during the preparation process of the activated rubber powder, no stabilizing activator is added.
Example 8
The differences from example 1 are: in the preparation process of the rubber asphalt, 5kg of matrix asphalt, 2kg of activated rubber powder and 0.01kg of stabilizer are added.
Example 9
The differences from example 1 are: in the preparation process of the rubber asphalt, 8kg of matrix asphalt, 4.7kg of activated rubber powder and 0.3kg of stabilizer are added.
Example 10
The differences from example 1 are: in the preparation process of the rubber asphalt, 4.9kg of activated rubber powder, 10kg of matrix asphalt and 0.35kg of stabilizer are added.
Comparative example 1
The differences from example 1 are: in the preparation process of the activated rubber powder, the temperature of a plasticizing machine is 320 ℃.
The properties of the rubber asphalts obtained in examples 1 to 10 and comparative example 1 were measured, and the measurement methods are shown in Table 1. The results are shown in Table 2.
TABLE 1
TABLE 2
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: when the activated rubber powder prepared by the method is used for preparing the rubber asphalt, the activated rubber powder is not easy to separate out of the matrix asphalt, and does not release irritant gas, so that the performance is more stable, and the rubber asphalt has better anti-aging performance. In addition, the process for preparing the rubber asphalt by adopting the activated rubber powder also has the advantages of simplicity, easiness in operation, low energy consumption, high environmental friendliness and the like.
It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those described or illustrated herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The preparation method of the activated rubber powder is characterized by comprising the following steps:
and carrying out desulfurization treatment on the waste tire rubber powder to obtain a desulfurization product, wherein the temperature of the desulfurization treatment is 200-300 ℃.
2. The process for the preparation of activated rubber powder according to claim 1, characterized in that said step of desulfurization treatment comprises: under the heating condition, the waste tire rubber powder is sheared, plasticized and extruded by double screws in a plasticizer to obtain the desulfurization product:
preferably, the shearing rate of the shearing process is 40-80 rpm/min.
3. The preparation method of the activated rubber powder as claimed in claim 1, wherein the particle size of the waste tire rubber powder is 10-40 meshes.
4. The process for the preparation of activated rubber powder according to any one of claims 1 to 3, characterized in that it further comprises a step of adding a stabilizing activator during the desulfurization;
preferably, the stabilizing activator is one or more of the group of rubber oil, plant extract oil and furfural extract oil.
5. The preparation method of the activated rubber powder as claimed in claim 4, wherein the amount of the stabilizing activator is 1-10% by percentage of the rubber powder of the waste tire.
6. Activated rubber powder, characterized in that it is obtained by the process for the preparation of activated rubber powder according to any one of claims 1 to 5.
7. A composition for preparing a stable and environment-friendly rubber asphalt, which is characterized by comprising the following components in parts by weight: the asphalt matrix comprises matrix asphalt, activated rubber powder and a stabilizer, wherein the activated rubber powder is the activated rubber powder in claim 6.
8. The composition for preparing the stable and environment-friendly rubber asphalt as claimed in claim 7, wherein the composition for preparing the stable and environment-friendly rubber asphalt comprises 50-80 parts by weight of the matrix asphalt, 20-47 parts by weight of the activated rubber powder and 0.1-3 parts by weight of the stabilizer.
9. The composition for preparing stable and environment-friendly rubberized asphalt according to claim 7 or 8, characterized in that the stabilizer is sulfur.
10. A stable environment-friendly rubber asphalt which is prepared from the composition for preparing the stable environment-friendly rubber asphalt described in any one of claims 7 to 9.
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| CN202111389803.7A CN114133620A (en) | 2021-11-22 | 2021-11-22 | Activated rubber powder, preparation method, composition containing activated rubber powder and stable environment-friendly rubber asphalt |
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| CN202111389803.7A CN114133620A (en) | 2021-11-22 | 2021-11-22 | Activated rubber powder, preparation method, composition containing activated rubber powder and stable environment-friendly rubber asphalt |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115160806A (en) * | 2022-07-18 | 2022-10-11 | 甘肃公航旅低碳科技有限公司 | Preparation method and application of low-carbon asphalt based on recycled resources |
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| US20160096960A1 (en) * | 2013-10-03 | 2016-04-07 | Chandrasekaran R. Pillai | Storage stabilized devulcanized tire rubber modified asphalt composition and the process for its preparation |
| CN107586460A (en) * | 2017-10-25 | 2018-01-16 | 中石油燃料油有限责任公司研究院 | A kind of rubber asphalt and preparation method thereof, application |
| CN109867838A (en) * | 2019-01-23 | 2019-06-11 | 雨中情防水技术集团有限责任公司 | A kind of activated waste rubber powder and preparation method thereof being exclusively used in modified asphalt waterproof coiled material |
| CN112646380A (en) * | 2020-12-23 | 2021-04-13 | 江苏宝利路面材料技术有限公司 | SBS asphalt regenerant and preparation method thereof |
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2021
- 2021-11-22 CN CN202111389803.7A patent/CN114133620A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20160096960A1 (en) * | 2013-10-03 | 2016-04-07 | Chandrasekaran R. Pillai | Storage stabilized devulcanized tire rubber modified asphalt composition and the process for its preparation |
| CN107586460A (en) * | 2017-10-25 | 2018-01-16 | 中石油燃料油有限责任公司研究院 | A kind of rubber asphalt and preparation method thereof, application |
| CN109867838A (en) * | 2019-01-23 | 2019-06-11 | 雨中情防水技术集团有限责任公司 | A kind of activated waste rubber powder and preparation method thereof being exclusively used in modified asphalt waterproof coiled material |
| CN112646380A (en) * | 2020-12-23 | 2021-04-13 | 江苏宝利路面材料技术有限公司 | SBS asphalt regenerant and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115160806A (en) * | 2022-07-18 | 2022-10-11 | 甘肃公航旅低碳科技有限公司 | Preparation method and application of low-carbon asphalt based on recycled resources |
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