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Rubber asphalt proportioning method and rubber asphalt detritus under-sealed layer technique

A technology of rubber asphalt and crushed stone, which is applied in building components, building insulation materials, buildings, etc., can solve the problem of low rubber powder content that cannot meet the design requirements of rubber powder asphalt pavement, solve the problem of reflection cracks, and improve waterproofness. and high deformability, to achieve the effect of interlayer bonding

Active Publication Date: 2010-02-17
THE THIRD ENG CO LTD OF CCCC SECOND HIGHWAY ENG BUREAU +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The amount of rubber powder is too low to meet the design requirements of rubber powder asphalt pavement

Method used

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  • Rubber asphalt proportioning method and rubber asphalt detritus under-sealed layer technique
  • Rubber asphalt proportioning method and rubber asphalt detritus under-sealed layer technique
  • Rubber asphalt proportioning method and rubber asphalt detritus under-sealed layer technique

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] 1. Selection of raw materials,

[0024] 1) Rubber crumbs

[0025] Rubber crumbs used in rubberized asphalt consist of scrap tires and rubber crumbs with a high natural rubber content. Rubber crumbs 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 adhesion of rubber crumbs, 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.

[0026] 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)

[0027] Table 1 Rubber crumb gradation passing rate (%)

[0028] mesh size

[0029] Table 2 Summary of chemical composition tests of rubber crumbs

[0030] Pilot projects

[0031] Rubber hydroc...

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Abstract

The invention relates to asphalt, in particular to a rubber asphalt proportioning method and a rubber asphalt detritus under-sealed layer technique. The method at least comprises rubber, matrix asphalt and single-sized detritus, wherein, the specification of the rubber scrap is 20 meshes, the dosage of the rubber scrap is 20%; the matrix asphalt is selected according to climate areas, number 50-70can be selected in a hot area; number 70-90 can be selected in a warm area; number 90-110 can be selected in a cold area; the dosage of the matrix asphalt is 77%; the single-sized detritus adopts limestone detritus in 9.5-13.2mm specification, the dosage of the single-sized detritus is 3%; the rubber, the matrix asphalt and the single-sized detritus are blended through processing equipment of therubber asphalt to form the rubber asphalt. The method comprises the following steps: 1) mixing the asphalt and single-sized detritus; drying and heating the temperature to 150DEG C-160 DEG C; 2) heating the asphalt and the rubber after being heated and dedusted by a mixer plant to 160 DEG C, transmitting the heated asphalt and the rubber to a high speed cutting stirrer for stirring, and heating the stirred asphalt and rubber to 190 DEG C rapidly; 3) cutting the asphalt and the rubber which are cooled to 177 DEG C, transmitting the cut asphalt and rubber to a reaction tank for reacting at least 45 minutes, and carrying out construction after the reacted asphalt and rubber are heated to 200 DEG C.

Description

technical field [0001] The invention relates to asphalt, in particular to a rubber asphalt proportioning method and a rubber asphalt macadam lower sealing layer process. 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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L21/00C08L7/00C08K3/04E01C7/26
Inventor 贾龙薛哲
Owner THE THIRD ENG CO LTD OF CCCC SECOND HIGHWAY ENG BUREAU
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