Rubber asphalt detritus under-sealed layer construction process

A technology of rubberized asphalt and construction technology, applied in the field of asphalt, can solve the problems of low rubber powder content that cannot meet the design requirements of rubber powder asphalt pavement, etc. The effect of bonding

Inactive Publication Date: 2011-09-21
THE THIRD ENG CO LTD OF CCCC SECOND HIGHWAY ENG BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of rubber powder is too low to meet the d

Method used

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  • Rubber asphalt detritus under-sealed layer construction process
  • Rubber asphalt detritus under-sealed layer construction process
  • Rubber asphalt detritus under-sealed layer construction process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] 1. Selection of raw materials,

[0011] 1) Rubber crumbs

[0012] Rubber crumbs used in rubberized asphalt consist of scrap tires and rubber crumbs with a high natural rubber content. The rubber crumb should not contain steel wire, fiber and other impurities. The content of steel wire should not exceed 0.01%, and the content of other impurities should be close to zero. In order to prevent the rubber crumbs from sticking, a small amount of calcium carbonate or talcum powder should be added appropriately, but the amount should not exceed 3% of the mass of the CRM.

[0013] The specification of the rubber crumb is 20 mesh (0.83mm). After testing and testing, all its indicators meet the technical requirements. (See Table 1, Table 2, Table 3 for details)

[0014] Table 1 Rubber crumb gradation passing rate (%)

[0015] mesh size

[0016] Table 2 Summary of chemical composition tests of rubber crumbs

[0017] Pilot projects

[0018] Table 3 Technical ...

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PUM

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Abstract

The invention relates to asphalt, in particular to a rubber asphalt detritus under-sealed layer construction process. The process is characterized by comprising the following steps of: 1) cleaning a base surface; 2) spreading engineering paper at the initial and final positions; 3) spreading rubber asphalt according to a spreading route through a rubber asphalt spreading trolley at the rubber asphalt spreading quantity of 2.2kg/m<2>, wherein the spreading temperature is not less than 130 DEG C; 4) spreading detritus through a detritus spreading trolley in a distance of 5 meter according to the spreading quantity of 16kg/m<2> along the route of the rubber asphalt spreading trolley, heating the detritus to the temperature of between 150 and 160 DEG C on the sealed layer, and spreading the detritus; and 5) rolling the rubber asphalt spread by the rubber asphalt spreading trolley and the single grain detritus spread by the detritus spreading trolley by using a wheel road roller with following distance of not more than 5 meters, wherein the rolling speed is 2 to 2.5km/h. The rubber asphalt detritus under-sealed layer construction process is reasonable in the proportion of rubber and asphalt of the rubber asphalt, stable in performance and simple.

Description

technical field [0001] The invention relates to asphalt, in particular to the construction technology of rubber asphalt macadam lower seal layer. Background technique [0002] Rubber powder modified asphalt has been widely used in highway pavement construction, and the control of the amount of rubber powder in rubber powder modified asphalt directly affects the quality of road pavement. If the amount of rubber powder is too high, it will increase the difficulty of road construction and require high-standard asphalt deployment. The amount of rubber powder is too low to meet the design requirements of rubber powder asphalt pavement. Rubber asphalt is applied in rubber asphalt macadam lower sealing layer technology. A certain amount of hot rubber asphalt is sprayed on the lower bearing layer, and a layer of single-size gravel is simultaneously spread. After rolling, the crushed stone is embedded in the asphalt film to play a role Adhesive, waterproof, anti-reflection cracks, ...

Claims

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Application Information

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IPC IPC(8): E01C7/26
Inventor 薛哲贾龙
Owner THE THIRD ENG CO LTD OF CCCC SECOND HIGHWAY ENG BUREAU
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