Warm-mixed modified rubber asphalt and preparation method

A modified rubber and warm mixing technology, which is applied to building insulation materials, building components, climate change adaptation, etc., can solve the problems of low preparation efficiency, high mixing and rolling temperature, and high production cost, and achieve low construction viscosity and reduced The effect of mixing and compacting temperature and low cost
CN111138878AInactive Publication Date: 2020-05-12GUANGDONG UNIV OF PETROCHEMICAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG UNIV OF PETROCHEMICAL TECH
Publication Date
2020-05-12
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses warm-mixed modified rubber asphalt which is prepared from the following raw materials (by weight): 21-32% of rubber powder, 2-4% of a warm-mixing agent, 0.5-5.5% of a modifierand the balance of matrix asphalt. A preparation method of the warm-mixed modified rubber asphalt comprises the following steps: heating the matrix asphalt to 100-115 DEG C by adopting a reaction kettle, externally doping 0.5%-5.5% of the modifier, and uniformly stirring at the stirring speed of 300-600 r / min; keeping the rotating speed constant, heating to 125-140 DEG C, adding 2-4% of a warm-mixing agent, and uniformly stirring; heating to 170-185 DEG C and boosting pressure, doping 21%-32% of rubber powder, conducting high-speed shearing at the speed of 2500-3500 r / min, keeping the pressureat 0.8-1.5 MPa, and maintaining for 30-45 min to obtain the warm-mixed modified rubber asphalt. The preparation method realizes waste utilization, and is energy-saving, environment-friendly and low-cost.
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Description

technical field

[0001] The invention relates to an asphalt-based road construction material, in particular to a warm-mixed modified rubber asphalt and a preparation method thereof, and belongs to the technical field of new asphalt pavement engineering design. Background technique

[0002] With the rapid growth of the domestic economy and the rapid development of the automobile industry, a large number of waste tires are produced, and waste tires are difficult to degrade and recycle, which has caused great pressure on the environment; in recent years, road construction has increased, and the demand for asphalt has continued to increase. put forward higher requirements for its performance. Warm-mix rubber asphalt emerged as the times require. Rubber asphalt can utilize a large number of waste tires. Rubber powder modified asphalt has good heat and cold resistance characteristics, and can effectively reduce road noise and improve road service life. However, the mixing and roll...

Claims

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