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Waste rubber powder modified asphalt composition and its preparation method

A technology of waste rubber powder and modified asphalt, which is applied to building structures, building components, building insulation materials, etc., can solve the problems of inability to generate active groups on the surface of rubber powder and complicated process, and achieve low production cost and low composition Simple, low-variety effects

Active Publication Date: 2006-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is complicated, and US5,762,700 pointed out that the use of hydrogen peroxide alone cannot cause active groups on the surface of rubber powder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 400 grams of base asphalt with a penetration (25°C, 0.1mm) of 65, first heated to 160°C and melted; Ester coupling agent TMC-105 (produced by Green Chemical Auxiliary Factory, Tianchang City, Anhui Province) and 5% extracted oil were stirred evenly), and sheared at 180° C. for 90 minutes. Compared with the modified asphalt without pretreatment of waste rubber powder, the difference between the upper and lower softening points of the segregation test was reduced from -11.5°C to -4.8°C, and the stability of the rubber powder modified asphalt was significantly improved.

Embodiment 2

[0024] 400 grams of base asphalt with a penetration (25°C, 0.1mm) of 130, first heated to 150°C to melt; add 25% of 60-mesh waste rubber powder, and then add 4.0% of compound monoalkoxy titanate TMC-931 (Green Chemical Auxiliary Factory, Tianchang City, Anhui Province), shearing at 190°C for 120 minutes. Compared with the waste rubber powder modified asphalt without coupling agent, the difference between the upper and lower softening points in the segregation test was reduced from -15.2°C to -7.0°C, showing better storage stability.

Embodiment 3

[0026] Compared with Example 2, this example differs in that: the addition amount, particle size and shearing time of the waste rubber powder are changed. In this embodiment, 20% waste rubber powder is added, the particle size of the rubber powder is 80 mesh, and the shearing time is 180 minutes. The coupling agent is TMC-931 and phytoacid type monoalkoxy titanate TC-F (produced by Anhui Tianchang Chemical Factory) in a weight ratio of 2:1. The difference between the upper and lower softening points in the segregation test decreased from -13.3°C to -5.4°C.

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PUM

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Abstract

The invention provides a method to improve the storage stability for waste rubber powder modified asphalt. Wherein, the opposite compound comprises: 70~98.5% basic asphalt, 1~29.5% waste rubber, 0~10.0% diluent, and 0.1~5.0% coupling agent. The method comprises: adding the agents with given ratio into the waste rubber powder past 60-item screen to mix evenly; adding the treated rubber powder into asphalt to grinde for 30~190min by special device. As the alkoxy in coupling agent can form chemical bonding with inorganic filler to form organic active monomolecular layer between interfaces, this product can improve obviously the storage stability.

Description

technical field [0001] The invention relates to a waste rubber powder modified asphalt composition and a preparation method thereof, in particular to a method for improving the storage stability of the waste rubber powder modified asphalt composition. Background technique [0002] With the development of the automobile industry, more and more "black pollution" formed by waste tires is threatening our living environment. Using waste rubber powder to produce high-quality modified asphalt can make full use of waste rubber. It is beneficial to eliminate environmental pollution, and can also improve the performance of asphalt pavement. [0003] However, at present, the main technical problem of waste rubber powder modified asphalt is the miscibility of rubber powder and asphalt. In order to improve the mutual solubility of rubber powder and asphalt, the main method adopted is to apply fine rubber powder with small particle size and fully disperse the rubber powder through collo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08K5/56C08L21/00
Inventor 张建峰郭皎河傅丽
Owner CHINA PETROLEUM & CHEM CORP
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