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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

Inactive Publication Date: 2020-05-12
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of high mixing and rolling temperature of asphalt mixture, high production cost and low preparation efficiency in the construction of rubber powder modified asphalt pavement in the prior art, and provide a warm-mixed modified rubber asphalt And preparation method, technical scheme is as follows:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of warm mixing modified rubber asphalt comprises the following steps:

[0021] (1) After heating the base asphalt to 110°C in a reactor, add 1.5% styrene-butadiene latex (weight percent) modifier, stir evenly, and the stirring speed is 450r / min;

[0022] (2) The rotation speed is constant, the temperature is raised to 125°C, and 2% (weight percentage) of warm mixing agent is added (the warm mixing agent is 2% of ethylene bisoleic acid amide, 10% of aromatic oil, 15% of DAT-H5, and the rest is Sasobit), stir well;

[0023] (3) Raise the temperature and pressure, raise the temperature to 175°C, add 21% (by weight) of rubber powder (waste radial tire powder 80 mesh), the pressure is 1MPa, 2800r / min high-speed shear, and maintain for 40min, that is, warm mixing Modified rubber asphalt.

[0024] Warm-mix modified rubber asphalt is composed of the following raw materials in weight percentage: rubber powder 21%, warm-mix agent 2%, modifier 1.5%, and th...

Embodiment 2

[0036] The preparation method of warm mixing modified rubber asphalt comprises the following steps:

[0037] (1) After heating the base asphalt to 115°C in a reactor, add 0.5% (weight percent) SDYK surfactant modifier, stir evenly, and the stirring speed is 300r / min;

[0038] (2) On the basis of step (1), keep the rotation speed constant, raise the temperature to 140°C, add 4% (weight percent) warm mix agent (warm mix agent is 4% ethylene bisoleic acid amide, 8% aromatic oil, DAT-H5 is 20%, the rest is Sasobit), stir well;

[0039] (3) Increase the temperature and pressure on the basis of step (2), raise the temperature to 185°C, add 32% (by weight) of rubber powder (waste bias tire powder, 60 mesh), and the pressure is 1.5MPa, 3500r / min Shear at high speed and maintain for 45 minutes to obtain warm-mixed modified rubber asphalt.

[0040] Warm-mix modified rubber asphalt is composed of the following raw materials in weight percentage: rubber powder 32%, warm-mix agent 4%, mo...

Embodiment 3

[0052] The preparation method of warm mixing modified rubber asphalt comprises the following steps:

[0053] (1) After heating the base asphalt to 100°C in a reactor, add 2% (weight percent) polyethylene wax modifier, stir evenly, and the stirring speed is 600r / min;

[0054] (2) On the basis of step (1), keep the rotation speed constant, raise the temperature to 135°C, and add 5.5% (weight percent) warm mix agent (the warm mix agent is 3% ethylene bisoleic acid amide, 12% aromatic oil, DAT-H5 is 10%, the rest is Sasobit), stir well;

[0055] (3) Increase the temperature and pressure on the basis of step (2), raise the temperature to 180°C, add 30% (by weight) of rubber powder (waste tire inner tube rubber powder, 90 mesh), and the pressure is 0.8MPa, 3000r / min Shear at high speed and maintain for 40 minutes to obtain warm-mixed modified rubber asphalt.

[0056] Warm-mix modified rubber asphalt is composed of the following raw materials in weight percentage: 30% rubber powder...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L19/00C08L9/08C08L23/06C08K5/20
CPCC08L95/00C08L2205/03C08L2205/035C08L19/003C08L9/08C08L91/00C08L23/06C08K5/20Y02A30/30
Inventor 温丽瑗张战军陈小平袁凯恒陈东庆柯海
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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