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Flexible asphalt concrete pavement construction method

A technology of asphalt concrete and asphalt mixture, which is applied to cohesive pavement paved on site, roads, roads, etc., can solve problems such as soil erosion and forest vegetation reduction, prevent reflection cracks, improve crack resistance performance, and prolong service life The effect of longevity

Inactive Publication Date: 2014-10-08
POWERCHINA MUNICIPAL CONSTR GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the use of a large number of new stones requires the mining of a large amount of ore, which will inevitably lead to serious ecological and environmental problems such as forest vegetation reduction and soil erosion.

Method used

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  • Flexible asphalt concrete pavement construction method

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Effect test

Embodiment 1

[0016] A kind of construction method of flexible asphalt concrete pavement of the present invention comprises the following steps:

[0017] Step (1) treatment of the lower bearing layer: clean up the soil and sundries on its surface, the four-meter ruler is 10mm, the compactness reaches 100%, and the result of the plate pressure test reaches EV2 greater than 105Mpa;

[0018] Step (2) Measure the elevation line: drill steel drill piles 60cm outside the construction sideline, hang wires on both sides to control the elevation, the pile distance is 10m, and the pile distance at the bend is 5m, hang ①3mm steel wire rope, and pull it with a wire tensioner every 100-150m Tight, the tension is generally 8 ~ 10KN;

[0019] Step (3) Mixing of asphalt mixture: Coarse aggregate: The parameters of crushed stone are at least consistent, the crushing value of stone material is not more than 26%, the adhesion to SBS modified asphalt is not less than grade 5; the firmness is not more than 12% ...

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Abstract

The invention relates to a flexible asphalt concrete pavement construction method. The method comprises the following steps: treating a lower supporting layer, arranging an elevation measuring wire, blending an asphalt mixed material and paving the asphalt mixed material, wherein the paving step comprises paving of a bottom layer, paving of a middle layer, paving of an upper layer and compaction of the asphalt mixed material; light, intermediate and heavy-type road rollers are used for construction according to a sequence of being light, intermediate and heavy; and the compactness is controlled to be larger than 95%. The method disclosed by the invention has the advantages of greatly reducing the use of a stone material in steps, also greatly saving the use of an asphalt raw material, remarkably improving the crack resistance of asphalt concrete, effectively preventing generation of reflection cracks on an asphalt surface layer and prolonging the service life of a pavement.

Description

technical field [0001] The invention relates to the field of expressway construction, in particular to a flexible asphalt concrete pavement construction method. Background technique [0002] At present, a large number of new stone materials need to be mined a large amount of ore, which will inevitably lead to serious ecological and environmental problems such as forest vegetation reduction and soil erosion. With the improvement of people's awareness of environmental protection, the increase in the price of asphalt resources, and the increasing shortage of sand and gravel materials, however, as the environment and construction conditions change, the modification of the modified asphalt mixture changes with the environment and construction conditions, such as low temperature Or construction in high-temperature seasons, the modified asphalt mixture must adapt to the Marshall test technical standards under the environmental requirements on the one hand, and at the same time, it ...

Claims

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Application Information

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IPC IPC(8): E01C7/18
Inventor 徐建亭王振宁
Owner POWERCHINA MUNICIPAL CONSTR GRP CO LTD
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