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Paving method for pavement base of road

A technology for road pavement and base layer, applied in the direction of roads, roads, buildings, etc., can solve the problem of difficult to meet the standard requirements of the road base layer, and achieve the effects of feasible construction technology, prevention of leaching, and high impermeability

Active Publication Date: 2018-09-25
武汉江夏路桥工程总公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The new "Technical Rules for Road Pavement Base Construction" (JTG / T F20~2015) has greatly improved the strength of the pavement subbase and base, and the cement-stabilized gravel is also very good under the premise of increasing the amount of cement and increasing construction measures. Difficult to meet new pavement base standard requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A paving method for a highway pavement base, comprising a subbase and a base, the mass percent of each component of the subbase is: PCSB curing agent 3.5%, asphalt waste powder 20%, fine aggregate 46.5%, coarse aggregate 30% %; The mass percent of each component of the base course is: PCSB curing agent 4.5%, asphalt waste powder 20%, fine aggregate 45.5%, coarse aggregate 30%.

[0034] Both sub-base and base-base are carried out in the following steps respectively:

[0035] 1. Section road bed (or underlayment) preparation

[0036] Clean the surface of the road bed (or the underlying layer), sprinkle water properly and roll it again, and conduct quality inspection to ensure that the surface is smooth, dense, flat, and free of loose particles;

[0037] Measure and set out the line, nail the reference line and tension it. Requirements for the baseline: one pile every 10m in the straight section of the road, the position of the flat curve is encrypted to 5.0m, and the te...

Embodiment 2

[0048] A paving method for a road pavement base, comprising a subbase and a base, the base is composed of 6.6% PCSB curing agent, 25% asphalt waste powder, 38% fine aggregate, and 30.4% coarse aggregate; the base is solidified by PCSB 6.5% additive, 25% asphalt waste powder, 42.5% fine aggregate, and 26% coarse aggregate.

[0049] Except weighing step, other steps are with embodiment one.

Embodiment 3

[0051] A paving method for a road pavement base, comprising a subbase and a base, the base consists of 8% PCSB curing agent, 30% asphalt waste powder, 35% fine aggregate, and 27% coarse aggregate; the base is solidified by PCSB 7.5% additive, 28% asphalt waste powder, 35% fine aggregate, and 29.5% coarse aggregate.

[0052] Except weighing step, other steps are with embodiment one.

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Abstract

The invention provides a paving method for a pavement base of a road. According to the invention, the special curing agent PCSB is blended with waste powder recovered from an asphalt concrete mixing station and coarse and fine aggregates according to a certain ratio, and then water is added for blending before paving of the pavement base. Since the PCSB curing agent is used for consolidating a waste asphalt powder material in paving of the pavement base, the pavement base can reach strength of 6.0 MPa or more and is free of cracking; a construction process is simple and manual kerf sawing is not needed; and the pavement base is allowed to have high strength, good integrity and good stability, and engineering cost for the road is reduced at the same time.

Description

technical field [0001] The invention belongs to the field of road construction, and in particular relates to a paving method for a road pavement base. Background technique [0002] The existing road pavement structure generally consists of a surface course, a base course, a subbase course and a cushion course. When paving the road, on the load-bearing surface of the roadbed that has been leveled, lay the cushion, subbase and base in sequence, and finally pave the surface layer on the base, compact it with a road roller, and complete the pavement of the road. Because cement-stabilized macadam has certain advantages in terms of strength, integrity, and durability, it is the most commonly used structural composition of road pavement bases in the past. The new "Technical Rules for Road Pavement Base Construction" (JTG / T F20~2015) has greatly improved the strength of the pavement subbase and base, and the cement-stabilized gravel is also very good under the premise of increasing...

Claims

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Application Information

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IPC IPC(8): E01C3/00
CPCE01C3/00E01C3/003
Inventor 刘芳李虹李开明刘明辉许应礼胡骏彭涛周小华杨华周恒刘震宇戈光弼陈洁文丕珍
Owner 武汉江夏路桥工程总公司
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