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A kind of asphalt for wear layer of extremely thin surface, its mixture and its use

A technology of asphalt mixture and wear layer, which is applied in the direction of building insulation materials, building components, buildings, etc., can solve the problems of rapid attenuation of drainage performance and noise reduction effect, high cost, and excessive size, so as to avoid excessive attenuation of surface functions Fast and too large, improve the surface function, the effect of large connected void ratio

Active Publication Date: 2016-01-06
BEIJING TONGHUA ROAD MAINTENANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] The technical problem solved by the present invention is that in the existing ultra-thin wear layer technology, the structural depth, drainage performance and noise reduction effect are too fast and too large; and the cost of the existing technology is too high.

Method used

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  • A kind of asphalt for wear layer of extremely thin surface, its mixture and its use
  • A kind of asphalt for wear layer of extremely thin surface, its mixture and its use
  • A kind of asphalt for wear layer of extremely thin surface, its mixture and its use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 90 parts of recrossed 70# pitch were heated to 160°C to make it fluid for use. Add 3 parts of dispersing co-solvent N-methylpyrrolidone to extract oil and 3 parts of styrene-butadiene rubber powder into the molten asphalt in turn, and stir for 2 hours. Add 3 parts ethylene methyl acrylate copolymer to the asphalt and stir for 30 minutes to ensure complete melt dispersion. Add 0.02 part of polyphosphoric acid, and continue to stir and react for 2 hours to obtain a finished asphalt product. The performance indicators of the finished modified asphalt are shown in Table 3.

[0046] Table 3 Performance index of modified asphalt for mixture

[0047]

[0048] The design thickness of the mixture in this case is 1.5cm, using 5-8mm basalt, 0-3mm limestone machine-made sand, and limestone ore powder.

[0049] See Table 4 for the screening results of stone and mineral powder, and Tables 5 and 6 for the test results of aggregate performance.

[0050] Table 4 Aggregate screenin...

Embodiment 2

[0066] Heat 94 parts of SBS modified I-B asphalt to 165 degrees Celsius to make it fluid for use, add 1.0 parts of dispersing co-solvent N-methylpyrrolidone, 1.0 parts of furfural extraction oil, and 2 parts of styrene-butadiene rubber powder to the molten asphalt at one time , stir for 2 hours. 2.5 parts of ethylene methyl acrylate copolymer was added to the asphalt, and stirred for 3.5 hours to obtain a finished asphalt product. The performance indexes of the finished modified asphalt are shown in Table 10.

[0067] Table 10 Performance index of modified asphalt for mixture

[0068]

[0069] The design thickness of the mixture in this case is 1.2cm, using 5-8mm basalt, 0-3mm limestone machine-made sand, and limestone ore powder.

[0070] See Table 11 for the screening results of stone and mineral powder, and Tables 12 and 13 for the test results of aggregate performance.

[0071] Table 11 Aggregate screening results

[0072]

[0073] Table 12 Test results of coarse ...

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Abstract

The invention relates to an asphalt for an ultrathin surface wearing layer, which comprises 90-96 weight parts of heavy-traffic or conventional modified asphalt and is added with a compound agent, wherein the compound agent consists of the following components in parts by weight: 2-3 parts of polymer, 1-3 parts of rubber and 1.5-3 parts of dispersing aid; and the mixture improves the viscosity and stiffness of asphalt as well as the adhesive force between asphalt and stone, and avoids or reduces the phenomenon that the asphalt floats upward and blocks gaps and consequently causes reduction of the structure depth, drainage performance and denoising effect of the mixture under the action of temperature and traffic load. The invention also discloses a mixture of the asphalt; by adding a grading control point to the mixture and matching the broken grade and the open grade, a stable skeleton embedding extrusion structure and the maximum skeleton gap are obtained, and higher porosity and maximum connection porosity are obtained so as to avoid skeleton instability and consequent surface function attenuation. The invention also discloses an application method of the mixture at the same time.

Description

technical field [0001] The invention belongs to the field of road pavement materials, and in particular relates to an asphalt used for hot-mixing and hot-paving an extremely thin surface wear layer, a mixture of the asphalt, and use thereof. Background technique [0002] Since the beginning of the 21st century, many highways built in my country in the early stage have entered the stage of major and intermediate repairs, and the international exchanges of maintenance-related concepts and technologies have become increasingly frequent. The gradual introduction of large-scale maintenance equipment has prompted highway maintenance, especially highways. Conservation has entered a new and complicated stage. The concept of preventive maintenance and related technologies are gradually understood and accepted by the majority of highway engineering technicians, and have been tried to varying degrees in various regions of the country, and have achieved certain practical results. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L9/06C08L7/00C08L23/08C04B26/26
Inventor 石红星陈智杰廖卫东陆山风焦朋朋秦鹏勋张伟董月振
Owner BEIJING TONGHUA ROAD MAINTENANCE
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