Construction method for rubber grain asphalt concrete pavement

A technology of asphalt concrete and rubber granules, which is applied to cohesive pavement paved on site, roads, roads, etc. It can solve the problems of poor steering operation stability, reduced adhesion coefficient, poor wear resistance, etc., to prolong service life and drive Effects of improved comfort and enhanced wear resistance

Inactive Publication Date: 2008-04-02
HARBIN INST OF 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 provide a construction method of rubber particle asphalt concrete pavement, which can solve the problem of poor wear resistance of asphalt concrete pavement and when the snow on the asphalt concrete pavement area freezes, the adhesion coefficient decreases, the adhesion force decreases, and the vehicle is damaged. Problems with poor braking stability and steering stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0006] Specific embodiment one: the construction method of the rubber particle asphalt concrete pavement of the present embodiment is finished like this: a, mixing: first select following raw material and form according to weight percentage: ore aggregate 76.5~91.5%, asphalt 2.5~7.5%, ore powder 4-10%, rubber granules 2-6%, heat the ore to 190-200°C, add the rubber granules to the ore and dry mix for 20-25s, then mix the pre-heated asphalt with Mineral powder is added to rubber granules and mineral material for mixing, and the heating temperature of the asphalt is 155-180°C; the entire mixing time from the dry mixing of mineral material and rubber granules to the addition of asphalt and mineral powder is 70-80s. Asphalt mixture; b. Paving: the temperature of the asphalt mixture during paving is 140-175°C, and the loose paving coefficient after paving is 1.25-1.30; c. The first stage of initial pressure: rolling with a road roller, rolling The temperature of the asphalt mixture...

specific Embodiment approach 2

[0007] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in this embodiment, in the mixing step a, the particle diameter of the rubber particles is 0.3-5 mm. It can improve the elastic deformation characteristics and surface state of the mixture.

specific Embodiment approach 3

[0008] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 is: In this embodiment, in the initial compaction step of the first stage c, a 10-12t double-wheel steel drum roller is used for rolling twice. In order to reduce the occurrence of wheel sticking caused by the high-viscosity characteristics of the material, it is advisable to use a double-wheel steel drum roller for rolling when the temperature is high.

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PUM

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Abstract

A method for constructing rubber particles asphalt concrete road surfaces relates to a method for constructing asphalt concrete road surfaces, aiming to resolve the problems that: the asphalt concrete road surfaces have weak wear-resistant, and the attachment coefficient and the adhesive force are reduced and vehicles have the problem of braking stability when the road surfaces are covered by snow and ice. The construction method comprises the following steps that: compositions by weigh percentage of the following materials are adopted: 76.5 to 91.5 percent of mineral aggregate, 2.5 to 7.5 percent of asphalt, 4 to 10 percent of mineral powder and 2 to 6 percent of rubber particles; the mineral aggregate is heated up to 190 to 200 DEG C, the rubber particles are added into the mineral aggregate with mixing about 20 to 25 seconds, the asphalt heated up in advance and the mineral powder are added into the rubber particles and the mineral aggregate with mixing lasting for 70 to 80 seconds, and then the road surfaces are subject to the pavement, the first stage initial pressure, the first and the second stage re-pressure and the second stage final pressure. The invention can increase the deformation capabilities of the road surfaces effectively, improve the bond state between the road surfaces and snow, and the invention can improve the attachment coefficient, increase the adhesive force, and improve the braking and turning operation stability of vehicles when the road surfaces are cover by snow and ice.

Description

technical field [0001] The invention relates to a construction method of asphalt concrete pavement. Background technique [0002] Most areas in my country belong to ice and snow areas, and the problem of snow and ice on road surfaces (ie, asphalt concrete road surfaces) is relatively common. Especially in the early winter and early spring seasons, under the effect of temperature changes and vehicle loads on the road surface, thin ice is easily formed on the road surface, which affects road traffic safety. According to the analysis, ice and snow greatly reduce the adhesion coefficient and adhesion force of the road surface, and the braking stability and steering operation stability of the vehicle will all become worse. The driver's vision is blurred, which leads to frequent traffic accidents, and the traffic accident rate in ice and snow days increases significantly. According to statistics, traffic accidents caused by road snow and ice account for more than 35% of the tota...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/35E01C7/26C04B26/26C04B16/04
Inventor 谭忆秋周纯秀徐立廷侯明昊
Owner HARBIN INST OF TECH
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