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Asphalt mixture with ultra-thin overlay

A technology of asphalt mixture and overlay, which is applied in the field of building materials, can solve the problems of low maintenance level and shortage of maintenance funds, and achieve the effects of convenient and fast construction, good skeleton structure, and prevention of early damage

Inactive Publication Date: 2018-04-10
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of highway construction in our country, the mileage of road maintenance continues to increase, resulting in a relative shortage of maintenance funds and a low level of maintenance

Method used

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  • Asphalt mixture with ultra-thin overlay
  • Asphalt mixture with ultra-thin overlay
  • Asphalt mixture with ultra-thin overlay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An embodiment of the asphalt mixture for the ultra-thin overcoat layer of the present invention, the asphalt mixture for the ultra-thin overcoat layer in this embodiment comprises the following components in weight percentage: 89.4% of stone material, 4.7% of mineral powder, Bitumen 5.5% and fiber 0.4%;

[0026] The stone is diabase; the stone includes stones with a particle size of 0-3 mm and stones with a particle size of 3-5 mm; the weight percentage of the stones with a particle size of 0-3 mm in the stone is 26 %, the weight percentage of the stone with a particle size of 3-5mm in the stone is 74%.

[0027] The asphalt is Shell PG-76 modified high-viscosity asphalt; the mineral powder is limestone mineral powder; and the fiber is polyester fiber.

[0028] Synthetic grading refers to the passing rate of the sieve hole of the corresponding size when the stone and mineral powder are added together. The synthetic grading is a more professional expression method than t...

Embodiment 2

[0058] An embodiment of the asphalt mixture for the ultra-thin overcoat layer of the present invention, the asphalt mixture for the ultra-thin overcoat layer in this embodiment contains the following components in weight percentage: 90.02% of stone material, 4.5% of mineral powder, Bitumen 5.1% and fiber 0.38%;

[0059] The stone is granite; the stone includes stones with a particle size of 0-3 mm and stones with a particle size of 3-5 mm; the weight percentage of the stones with a particle size of 0-3 mm in the stone is 24%, The stone with a particle size of 3-5 mm has a weight percentage of 76% in the stone.

[0060] The asphalt is Shell HV modified high-viscosity asphalt; the mineral powder is limestone mineral powder; and the fiber is polyester fiber.

[0061] The synthesis gradation of the ultra-thin overlay asphalt mixture described in this example is shown in Table 9.

[0062] Table 9 Synthetic gradation composition table

[0063]

[0064] After the above material...

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Abstract

The invention discloses an asphalt mixture with an ultra-thin overlay. The asphalt mixture comprises the following preparation raw materials in percentages by weight: 88.5%-91% of stone materials, 4.5%-5.0% of mineral powder, 5-6% of asphalt, and 0.3-0.5% of fibers; and the stone materials includes a stone material with a particle size of 0-3mm and a stone material with a particle size of 3-5mm, wherein the weight content of the stone material with the particle size of 0-3mm is 23-27% in the stone materials, and the weight content of the stone material with the particle size of 3-5mm is 73-77%in the stone materials. The asphalt mixture with the ultra-thin overlay disclosed by the invention belongs to skeleton dense types, and has a better skeleton structure, so that the asphalt mixture with the ultra-thin overlay prepared in a reasonable ratio has stronger deformation and rutting resistant ability, has a good structure depth, and meets the anti-slip requirements for road surface acceptance; and the asphalt mixture has good high-temperature, low-temperature, and water-stable properties, and has positive effects on effective prevention of early damage to the road surface.

Description

technical field [0001] The invention relates to a building material, in particular to an ultra-thin overlay asphalt mixture. Background technique [0002] With the rapid development of highway construction in our country, the mileage of road maintenance continues to increase, resulting in a relative shortage of maintenance funds and a low level of maintenance. To change the current situation of passive maintenance, the most effective way is to implement preventive maintenance. As a preventive maintenance measure, thin-layer overlay has been proved to be a technology worthy of promotion by foreign practice, and has certain reliability. [0003] Foreign engineering practice has proved that ultra-thin asphalt concrete overlay, as a preventive maintenance measure, can prolong the service life of highway pavement for at least 5 years compared with micro-surfacing. Compared with traditional thin-layer overlay, ultra-thin The compacted thickness of the layer cover can be as low a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2201/20C04B14/04C04B14/28C04B16/0683C04B14/048
Inventor 吴旷怀祝轩蔡旭梁娟龚侥斌
Owner GUANGZHOU UNIVERSITY
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