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Medium-temperature rubber asphalt mixture modifier and preparation method thereof

A technology of rubber asphalt and modifier, which is applied in the field of medium temperature rubber asphalt mixture modifier and its preparation, which can solve the problems of large influence of mixing equipment, poor construction workability, and difficulty in construction rolling, so as to improve compaction Performance, improve low temperature ductility, ensure the effect of low temperature crack resistance

Inactive Publication Date: 2013-07-17
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rubber asphalt mixture mixed by the wet process has a high high-temperature viscosity, and the mixing temperature must exceed 180°C, usually at 190°C. The energy consumption is high, and the mixing equipment is greatly affected. At the same time, it is difficult to roll and compact, and the construction is easy In order to solve the problem of high temperature construction of rubber asphalt mixture, ensure the ease of construction, realize energy saving and emission reduction, and improve road performance, a medium temperature rubber asphalt mixture modifier and its preparation method were developed

Method used

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  • Medium-temperature rubber asphalt mixture modifier and preparation method thereof
  • Medium-temperature rubber asphalt mixture modifier and preparation method thereof
  • Medium-temperature rubber asphalt mixture modifier and preparation method thereof

Examples

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Embodiment 1

[0026] Example 1: This example specifically relates to a medium-temperature rubber asphalt mixture modifier and its preparation method. The weight ratio of the modifier is: 100 parts of 40-mesh rubber powder, 20 parts of polyethylene wax, 5 parts of styrene-butadiene rubber, 4 parts of alkyl trimethyl quaternary ammonium salt, 0.5 part of sulfur.

[0027] The above-mentioned rubber powder is waste tire rubber powder crushed and ground at room temperature, which is a black homogeneous powder of 40 mesh to 60 mesh, with a relative density of 1.10 to 1.30, a water content of less than 0.5%, a metal content of less than 0.05%, and a fiber content of less than 0.5%. The ash content is less than 7%, and the natural rubber content is greater than 25%.

[0028] The above-mentioned polyethylene wax is obtained by catalytic cracking of waste polyethylene plastics. Its melting point is 90-110°C and its average molecular weight is between 1000-3000. It can reduce the viscosity of asphalt ...

Embodiment 2

[0032] Embodiment 2: This embodiment specifically relates to a medium-temperature rubber asphalt mixture modifier. The preferred weight ratio of the modifier is: 100 parts of 40-mesh rubber powder, 15 parts of polyethylene wax, styrene-butadiene rubber 8 parts, imidazoline type ammonium salt 5 parts, sulfur 0.8 part. The preparation method of this modifying agent is the same as that in Example 1.

Embodiment 3

[0033] Embodiment 3: This embodiment specifically relates to a medium-temperature rubber asphalt mixture modifier. The preferred weight ratio of the modifier is: 100 parts of 40-mesh rubber powder, 25 parts of polyethylene wax, styrene-butadiene rubber 6 parts, 6 parts of imidazoline type ammonium salt, 0.5 part of sulfur. The preparation method of this modifying agent is the same as that in Example 1.

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Abstract

The invention belongs to the field of a road material, and particularly relates to a medium-temperature rubber asphalt mixture modifier and a preparation method thereof. The modifier comprises the following components in parts by weight: 100 parts of rubber powder, 10-30 parts of polyethylene wax, 5-10 parts of butadiene styrene rubber, 2-6 parts of lubricative surfactant, and 0.1-1 part of stabilizer. The preparation method comprises the steps of heating and melting the rubber powder, the polyethylene wax, the butadiene styrene rubber, the lubricative surfactant and the stabilizer at 130-160 DEG C, evenly mixing, extruding by a screw extruder, cooling at normal temperature, and cutting into particles. The medium-temperature rubber asphalt mixture modifier and the preparation method thereof have the advantages that the effects of environmental friendliness, energy saving and emission reduction are achieved, junked tires are recycled, the mixing temperature of the rubber asphalt mixture can be effectively reduced by 20-40 DEG C, the high-temperature viscosity of asphalt is reduced, the workability in construction is ensured, the blocking property between the asphalt cement and aggregate is enhanced, the water damage resistance of the rubber asphalt mixture is improved, and the rut resistance and the low temperature resistance of the rubber asphalt mixture are enhanced.

Description

technical field [0001] The invention belongs to the field of road materials, and specifically relates to a medium-temperature rubber asphalt mixture modifier and a preparation method thereof. The modifier can realize the recycling of waste rubber tires, improve the road performance of the asphalt mixture, and reduce the asphalt mixture. construction temperature. Background technique [0002] With the continuous growth of the world economy and the rapid development of the automobile industry, the number of waste tires has increased dramatically. According to statistics, 1.5 billion waste tires are produced in the world every year. Scrap tires have strong heat resistance, mechanical resistance and degradation resistance, and they will not degrade naturally for decades. Waste tires are called "black pollution", which is internationally recognized industrial hazardous solid waste, and is one of the most harmful wastes that deteriorate the natural environment, destroy vegetatio...

Claims

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Application Information

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IPC IPC(8): C08L21/00C08L23/06C08L9/06C08L95/00C08K5/19C08K5/3445
Inventor 温学钧郑晓光麻旭荣白彦峰
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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