High-mixing-amount rubber powder-SBS composite modified asphalt and preparation method thereof

A technology of composite modified asphalt with high content, applied in building components, building insulation materials, construction, etc., can solve the problem of difficulty in increasing the content of rubber powder, limited compatibility of rubber powder and asphalt, and insufficient modification effect Take advantage of other issues to achieve good high and low temperature performance and improve performance

Inactive Publication Date: 2021-09-24
CHANGAN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the compatibility of rubber powder and asphalt, it is difficult to increase the amount of rubber powder and the modification effect cannot be fully exerted. Therefore, it is necessary to find a method that can effectively increase the amount of rubber powder in rubber powder-SBS composite modified asphalt. method

Method used

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  • High-mixing-amount rubber powder-SBS composite modified asphalt and preparation method thereof
  • High-mixing-amount rubber powder-SBS composite modified asphalt and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] In this embodiment, a high-volume rubber powder-SBS composite modified asphalt is designed, and its components include 100 parts by weight of base asphalt, 34 parts of waste tire rubber powder, 3 parts of SBS, 1.5 parts of cracking agent, aromatic oil Makes 3 servings. The rubber powder used in this embodiment is road-use waste tire vulcanized rubber powder with a relatively high content of natural rubber powder ground and pulverized at room temperature, and the specification of the rubber powder is 40 mesh. The preparation process of high-volume rubber powder-SBS composite modified asphalt in this example is as follows:

[0040] (1) Dehydrate and dry the base asphalt and the modifier respectively. The dehydration temperature of the base asphalt is controlled at 140°C, and the drying temperature of the modifier is controlled at 50°C;

[0041] (2) Pretreatment of rubber powder: Weigh rubber powder, aromatic oil and cracking agent into a sample tank, stir with an electri...

Embodiment 2

[0047]In this embodiment, a high-volume rubber powder-SBS composite modified asphalt is designed, and its components include 100 parts by weight of base asphalt, 38 parts of waste tire rubber powder, 3 parts of SBS, 1.5 parts of cracking agent, aromatic oil Makes 3 servings. The rubber powder used in this embodiment is road-use waste tire vulcanized rubber powder with a relatively high content of natural rubber powder ground and pulverized at room temperature, and the specification of the rubber powder is 40 mesh. The preparation process steps are the same as in Example 1.

Embodiment 3

[0049] In this embodiment, a high-volume rubber powder-SBS composite modified asphalt is designed, and its components include 100 parts by weight of base asphalt, 42 parts of waste tire rubber powder, 3 parts of SBS, 1.5 parts of cracking agent, aromatic oil Makes 3 servings. The rubber powder used in this embodiment is road-use waste tire vulcanized rubber powder with a relatively high content of natural rubber powder ground and pulverized at room temperature, and the specification of the rubber powder is 40 mesh. The preparation process steps are the same as in Example 1.

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Abstract

The invention discloses high-mixing-amount rubber powder-SBS composite modified asphalt and a preparation method thereof, and belongs to the technical field of road modified asphalt materials. The composite modified asphalt is prepared from, in parts by weight, 100 parts of matrix asphalt, 30-50 parts of waste tire rubber powder, 1-4 parts of SBS, 1-3 parts of a rubber powder cracking agent and 1-6 parts of aromatic oil, wherein the rubber powder cracking agent is ferric oxide. The preparation method mainly comprises the steps of raw material dehydration, modifier pre-activation, pre-shearing, formal shearing and heat preservation development. According to the high-mixing-amount rubber powder-SBS composite modified asphalt provided by the invention, the mixing amount of the rubber powder in the composite modified asphalt is increased, the modification effect of the rubber powder and the SBS is exerted to the maximum extent, the performance of the asphalt is further improved, and the composite modified asphalt has good high and low temperature performance, elastic recovery and storage stability.

Description

technical field [0001] The invention belongs to the technical field of road modified asphalt materials, and in particular relates to a high-volume rubber powder-SBS composite modified asphalt and a preparation method thereof. Background technique [0002] In recent years, the road network has been continuously densified and upgraded, the vehicles tend to be larger, the traffic load level has been continuously increased, and the frequency of extreme weather such as extreme cold, heat, and rainstorms has also increased, all of which have brought increasingly severe challenges to the asphalt pavement . Under the action of load and environment, many asphalt pavements have premature cracks, rutting and extensive water damage. For this reason, modified asphalt and its mixture are prepared by adding polymers to asphalt to deal with these situations, among which the widely used polymer is SBS. Its appearance and application increase the high and low temperature performance of asph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L17/00C08L53/02C08L91/00C08J11/16C08L19/00
CPCC08L95/00C08J11/16C08J2319/00C08L2207/24C08L2205/035C08L17/00C08L53/02C08L91/00Y02W30/62
Inventor 姚爱玲夏雨澍郑华宇周泽晓荆智涛曹昊楠李红锋朱建国姚晓峰姚峰王永岗贾益王敬涛王明洁李伟功李世芳马西芳郭豪
Owner CHANGAN UNIV
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