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Method for preparing waste rubber modified asphalt

A technology for modifying asphalt and waste rubber, which is applied in building components, building insulation materials, construction, etc., which can solve the problems of poor storage stability, high price, and high requirements for the design of mixture ratio, and achieve good dispersion and high cost performance. Effect

Inactive Publication Date: 2009-10-14
SHENZHEN OCEANPOWER NEW MATERIALS TECH
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Problems solved by technology

[0002] At present, rubber powder modified asphalt is attracting people's attention and attention because of its excellent performance and resource environmental protection, and it is gradually rising in China. However, rubber powder modified asphalt has unstable performance (poor storage stability), mixture ratio Disadvantages of high design requirements
SBS modified asphalt has been widely used for its excellent comprehensive performance, but it also has the disadvantages of high price and poor aging resistance

Method used

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  • Method for preparing waste rubber modified asphalt
  • Method for preparing waste rubber modified asphalt
  • Method for preparing waste rubber modified asphalt

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Embodiment

[0014] 1. Preparation of waste rubber composite modifier:

[0015] (1) Components and percentage by weight: SBS is 10%, rubber powder is 80%, PE (polyethylene) is 10%. The rubber powder adopts a particle size of more than 40 meshes, odorless desulfurized rubber powder, wherein the content of waste rubber powder (reclaimed rubber powder) accounts for more than 55% of the total rubber powder;

[0016] (2) Preparation of waste rubber composite modifier: Stir and mix the above components evenly, and the stirring speed is 100-400rpm;

[0017] 2. Preparation of waste rubber modified asphalt:

[0018] First, heat No. 90 heavy traffic asphalt as base asphalt to 160°C, and then add waste rubber composite modifier to form asphalt mixture, wherein the content of waste rubber composite modifier accounts for 6% of the total waste rubber modified asphalt, Carry out high-speed shearing at a speed of 4000rpm for 15 minutes by a high-speed shearing instrument, disperse the asphalt mixture ev...

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Abstract

The invention discloses a method for preparing waste rubber modified asphalt, which comprises the following steps: A, 8-12 percent of SBS, 75-85 percent of rubber powder and 7-13 percent of PE are evenly stirred and mixed to prepare a waste rubber composite modifier, wherein the sum of the weight percentages of the SBS, the rubber powder and the PE is 100 percent, and the content of the waste rubber powder in the rubber powders is above 50 percent of the total rubber powder; and B, matrix asphalt is firstly heated to 150-165 DEG C, and the waste rubber composite modifier is added into the matrix asphalt to form asphalt mixture, wherein the content of the waste rubber composite modifier is 5-20 percent of the total waste rubber modified asphalt, the waste rubber composite modifier is sheared at a high speed through a high-speed shearing apparatus until the asphalt mixture is scattered evenly, a stabilizing agent is added into the waste rubber composite modifier, the temperature is kept at the temperature of 160-180 DEG C and the waste rubber composite modifier is sheared continuously for 20-30 minutes so as to make the waste rubber modified asphalt. The waste rubber modified asphalt prepared by the method has no pollution and high cost performance, and completely satisfies the technical specification requirement on SBS modified asphalt.

Description

technical field [0001] The invention relates to a preparation method of modified asphalt, in particular to a preparation method of waste rubber modified asphalt. Background technique [0002] At present, rubber powder modified asphalt is attracting people's attention and attention because of its excellent performance and resource environmental protection, and it is gradually rising in China. However, rubber powder modified asphalt has unstable performance (poor storage stability), mixture ratio Design requirements and other disadvantages. SBS modified asphalt has been widely used for its excellent comprehensive performance, but it also has the disadvantages of high price and poor aging resistance. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the above-mentioned technical defects and provide a pollution-free, good performance and cost-effective preparation method of waste rubber modified asphalt. [0004] In...

Claims

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Application Information

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IPC IPC(8): C08L95/00C08L17/00C08L53/02C08L23/06C08K5/00C08K5/54
Inventor 赵欣平徐世国李伟新何唯平
Owner SHENZHEN OCEANPOWER NEW MATERIALS TECH
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