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Construction method for paving expressway with asphalt concrete

A technology of asphalt concrete and construction method, which is applied to the coagulation pavement, roads, roads and other directions of on-site paving, can solve the problems of highway pavement structural deformation, economic loss, safety hazards, etc., to ensure stability, avoid fracture, reduce crack effect

Inactive Publication Date: 2020-07-28
杜亚军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the rapid increase of traffic volume and large-tonnage vehicles, as well as complex and changeable natural conditions and many other factors, the use of current conventional asphalt concrete construction methods has caused serious deformation and damage to the pavement structure of the expressway, resulting in Huge security risks and huge economic losses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare materials before construction:

[0026] Asphalt: Grade A petroleum asphalt No. 70;

[0027] Coarse aggregate: gravel particle size is 3-5mm, and the gravel is hard, clean, and does not contain weathered particles;

[0028] Fine aggregate: the particle size of fine aggregate is 1-2mm;

[0029] Filler Ⅰ: Mineral powder obtained by grinding limestone and quartzite, and the mass ratio of limestone and quartzite is 9.9:0.1

[0030] Filler Ⅱ: Limestone slag powder: slag powder obtained by grinding limestone;

[0031] Nylon 66 fiber: length 2-4cm, diameter 0.2-0.5mm;

[0032] Metal fiber: aluminum fiber, length 2-4cm, diameter 0.2-0.5mm.

[0033] (1) Material mixing:

[0034] Material A: Control the temperature of the asphalt at 150-190°C, add coarse aggregate, fine aggregate and nylon 66 fiber during the mixing process, add filler I after stirring evenly, and keep the evenly mixed mixture at 150-170°C The parts by weight of the pitch is 7 parts, the parts by wei...

Embodiment 2

[0042] Asphalt: Grade A petroleum asphalt No. 70;

[0043] Coarse aggregate: gravel particle size is 3-5mm, and the gravel is hard, clean, and does not contain weathered particles;

[0044] Fine aggregate: the particle size of fine aggregate is 1-2mm;

[0045] Filler Ⅰ: Mineral powder obtained by grinding limestone and quartzite, and the mass ratio of limestone and quartzite is 9.9:0.1

[0046] Filler Ⅱ: Limestone slag powder: slag powder obtained by grinding limestone;

[0047] Nylon 66 fiber: length 2-4cm, diameter 0.2-0.5mm;

[0048] Metal fiber: aluminum fiber, length 2-4cm, diameter 0.2-0.5mm.

[0049] (1) Material mixing:

[0050] Material A: Control the temperature of the asphalt at 150-190°C, add coarse aggregate, fine aggregate and nylon 66 fiber during the mixing process, add filler I after stirring evenly, and keep the evenly mixed mixture at 150-170°C The parts by weight of the pitch is 10 parts, the parts by weight of the coarse aggregate is 80 parts, the par...

Embodiment 3

[0057] Asphalt: Grade A petroleum asphalt No. 70;

[0058] Coarse aggregate: gravel particle size is 3-5mm, and the gravel is hard, clean, and does not contain weathered particles;

[0059] Fine aggregate: the particle size of fine aggregate is 1-2mm;

[0060] Filler Ⅰ: mineral powder obtained by grinding limestone and quartzite, and the mass ratio of limestone and quartzite is 9.9:0.1;

[0061] Filler Ⅱ: Limestone slag powder: slag powder obtained by grinding limestone;

[0062] Nylon 66 fiber: length 2-4cm, diameter 0.2-0.5mm;

[0063] Metal fiber: aluminum fiber, length 2-4cm, diameter 0.2-0.5mm.

[0064] (1) Material mixing:

[0065] Material A: Control the temperature of the asphalt at 150-190°C, add coarse aggregate, fine aggregate and nylon 66 fiber during the mixing process, add filler I after stirring evenly, and keep the evenly mixed mixture at 150-170°C The parts by weight of the pitch is 8 parts, the parts by weight of the coarse aggregate is 75 parts, the par...

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Abstract

The invention discloses a construction method for paving expressway with asphalt concrete. The method comprises steps of material mixing, paving and compacting; wherein the materials are mixed duringmixing, four kinds of asphalt concrete, including a material A, a material B, a material C and a material D, are prepared; the material A comprises asphalt, coarse aggregate, fine aggregate, chinlon 66 and filler I, the material B comprises asphalt, coarse aggregate, fine aggregate, metal fibers and filler I, the material C comprises asphalt, coarse aggregate, fine aggregate, chinlon 66 fibers, metal fibers and filler I, and the material D comprises asphalt, coarse aggregate, fine aggregate, chinlon 66 fibers and filler II; and in the step of paving, the material A, the material B, the material C and the material D are sequentially spread. When the asphalt concrete is prepared, the fibers are added, due to the flexibility of the fibers, the toughness of the asphalt concrete mixed with thefibers is enhanced, and cracks of a pavement are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of highway construction, in particular to a construction method for laying highway asphalt concrete. Background technique [0002] With the rapid development of the national economy, the country has invested a lot of resources in infrastructure construction. As one of the infrastructures, expressways are developing at a rapid pace. However, with the rapid increase of traffic volume and large-tonnage vehicles, as well as complex and changeable natural conditions and many other factors, the use of current conventional asphalt concrete construction methods has caused serious deformation and damage to the pavement structure of the expressway, resulting in Huge security risks and huge economic losses. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a construction method for laying highway asphalt concrete. [0004] In order to achieve the abov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/26E01C7/32E01C11/16E01C19/10E01C19/18
CPCE01C7/262E01C7/32E01C11/165E01C19/10E01C19/185
Inventor 杜亚军张颖
Owner 杜亚军
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