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Modified emulsified asphalt concrete

A technology for emulsified asphalt and concrete, which is applied in the field of road pavement construction and can solve problems such as oil flooding and hemp surface.

Active Publication Date: 2021-05-14
CONSTR COMPANY OF CHINA RAILWAY NO 8 ENGNEERING GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a modified emulsified asphalt concrete. The modified emulsified asphalt concrete of the present invention can have a more durable road surface for the harsh environment in plateau areas, and effectively solve the problem of oily, pockmarked, and shrinkage cracks on the asphalt pavement. And other issues

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The modified emulsified asphalt concrete in this embodiment includes the following components in mass percentage: 4.6% asphalt, 6% slag powder, 42% fine aggregate, 47% coarse aggregate, and 0.4% anti-stripping agent.

[0022] The asphalt is SBRⅡ-A type modified asphalt (asphalt ratio is 4.8%), the fine aggregate is 0-4.75mm machine-made sand, the coarse aggregate is 4.75-9.5mm crushed stone and 9.5-16mm crushed stone , wherein, the doping amount of 4.75-9.5mm gravel is 25%, the doping amount of 9.5-16mm gravel is 22%, and the anti-stripping agent is HY-1 type anti-stripping agent.

[0023] The above-mentioned components are heated and dried, sieved, weighed and then mixed to obtain the modified emulsified asphalt concrete of this embodiment.

Embodiment 2

[0025] The modified emulsified asphalt concrete in this embodiment includes the following components in mass percentage: 4.4% asphalt, 7% slag powder, 43% fine aggregate, 45% coarse aggregate, and 0.6% anti-stripping agent.

[0026] The asphalt is SBRⅡ-A type modified asphalt (asphalt ratio is 4.6%), the fine aggregate is 0-4.75mm machine-made sand, the coarse aggregate is 4.75-9.5mm crushed stone and 9.5-16mm crushed stone , wherein, the doping amount of 4.75-9.5mm gravel is 24%, the doping amount of 9.5-16mm gravel is 21%, and the anti-stripping agent is HY-1 type anti-stripping agent.

[0027] The above-mentioned components are heated and dried, sieved, weighed and then mixed to obtain the modified emulsified asphalt concrete of this embodiment.

Embodiment 3

[0029] The modified emulsified asphalt concrete in this embodiment includes the following components in mass percentage: 4.7% asphalt, 5% slag powder, 42% fine aggregate, 48% coarse aggregate, and 0.3% anti-stripping agent.

[0030] The asphalt is SBRⅡ-A type modified asphalt (asphalt ratio is 4.9%), the fine aggregate is 0-4.75mm machine-made sand, the coarse aggregate is 4.75-9.5mm crushed stone and 9.5-16mm crushed stone , wherein, the doping amount of 4.75-9.5mm gravel is 25%, and the doping amount of 9.5-16mm gravel is 23%.

[0031] The above-mentioned components are heated and dried, sieved, weighed and then mixed to obtain the modified emulsified asphalt concrete of this embodiment.

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Abstract

The invention provides modified emulsified asphalt concrete, and belongs to the technical field of road pavement construction. The modified emulsified asphalt concrete comprises the following components in percentage by mass: 4%-5% of asphalt, 5%-7% of slag powder, 40%-50% of fine aggregate, 40%-50% of coarse aggregate and 0.2%-0.8% of an anti-stripping agent, the asphalt is SBRII-A type modified asphalt, the fine aggregate is 0-4.75 mm machine-made sand, the coarse aggregate is 4.75-9.5 mm broken stone and 9.5-16 mm broken stone, and the doping amount of the 4.75-9.5 mm broken stone is higher than that of the 9.5-16 mm broken stone. The HY-1 type anti-stripping agent is added into the modified emulsified asphalt concrete, so that the adhesive force between asphalt and aggregate can be increased, the water damage resistance and thermal aging resistance of the asphalt concrete are improved, the possibility of forming oil flooding and pitted surfaces on a pavement is reduced, and the service life of the pavement is prolonged; by using the SBRII-A type modified asphalt, the influence of plateau day and night temperature difference on the asphalt pavement can be reduced, the low-temperature cracking resistance and the high-temperature rutting resistance are improved, and shrinkage cracks formed on the asphalt pavement are reduced or avoided.

Description

technical field [0001] The invention belongs to the technical field of road pavement construction, in particular to a modified emulsified asphalt concrete. Background technique [0002] Asphalt concrete is widely used in construction project pavement engineering, which has the advantages of smooth surface, no joints, comfortable driving, low vibration, low noise, wear resistance, no dust, easy cleaning, short construction period, easy maintenance and recyclable utilization, etc. . Due to the harsh environmental conditions such as large temperature difference between day and night, extremely strong ultraviolet rays, high and concentrated precipitation, mixed rain and snow, and hail in the plateau area, a series of diseases such as oily, pockmarked surfaces, and shrinkage cracks are prone to occur. When the road surface is irradiated by the sun at noon, the high temperature will cause the free asphalt on the road surface to expand and move up due to heat, causing the hazard o...

Claims

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Application Information

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IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B18/141C04B14/02C04B14/06C04B2103/0068Y02W30/91
Inventor 刘刊许涛杨勇成元叶光王波冉华代聪吴志国刘东王春龙
Owner CONSTR COMPANY OF CHINA RAILWAY NO 8 ENGNEERING GRP
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