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Steel slag semi-flexible composite pavement structure

A composite pavement, semi-flexible technology, applied in the direction of on-site coagulation pavement, roads, roads, etc., can solve the problems of fatigue cracking of semi-flexible pavement, so as to reduce fatigue cracking, prolong anti-fatigue life, and prolong long-term effectiveness. Effect

Active Publication Date: 2019-09-13
河北迁曹高速公路开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the purpose of the present invention is to provide a steel slag semi-flexible composite pavement structure, improve the high temperature stability, low temperature crack resistance, fatigue resistance and water stability of semi-flexible pavement materials, and solve the problem of existing semi-flexible pavement The problem of fatigue cracking

Method used

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  • Steel slag semi-flexible composite pavement structure
  • Steel slag semi-flexible composite pavement structure
  • Steel slag semi-flexible composite pavement structure

Examples

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Embodiment 1

[0022] The steel slag semi-flexible composite pavement structure of this embodiment, raw materials include the following components by weight: 80 parts of asphalt, 300 parts of steel slag, 110 parts of ordinary portland cement, 100 parts of fly ash, hydroxyethyl methyl cellulose ether 5 parts, 20 parts of rubber particles, 3 parts of octene polymer, 3 parts of maleic anhydride, 2 parts of allyl ether, 1 part of hydroxyethyl acrylate, 2 parts of styrene-butadiene-styrene block copolymer , 1 part of plasticizer, 1 part of polyester fiber;

[0023] In this embodiment, the steel slag is a mixture of coarse steel slag with a particle size of 10 mm and fine steel slag with a particle size of 5 mm, and the steel slag has been passivated; the weight ratio of the coarse steel slag to the fine steel slag is 3:1

[0024] In this embodiment, the rubber particles are a mixture of coarse rubber particles with a particle diameter of 0.5 mm and fine rubber particles with a particle diameter o...

Embodiment 2

[0026] The steel slag semi-flexible composite pavement structure of this embodiment, raw materials include the following components by weight: 120 parts of asphalt, 480 parts of steel slag, 130 parts of ordinary Portland cement, 160 parts of fly ash, hydroxyethyl methyl cellulose ether 10 parts, 30 parts of rubber particles, 8 parts of octene polymer, 8 parts of maleic anhydride, 6 parts of allyl ether, 3 parts of hydroxyethyl acrylate, 4 parts of styrene-butadiene-styrene block copolymer , 3 parts of plasticizer, 3 parts of polyester fiber;

[0027] In this embodiment, the steel slag is a mixture of coarse steel slag with a particle size of 20mm and fine steel slag with a particle size of 10mm, and the steel slag has been passivated; the weight ratio of the coarse steel slag to the fine steel slag is 3:1

[0028]In this embodiment, the rubber particles are a mixture of coarse rubber particles with a diameter of 1 mm and fine rubber particles with a particle diameter of 0.2 mm...

Embodiment 3

[0030] The steel slag semi-flexible composite pavement structure of this embodiment, raw materials include the following components by weight: 80 parts of asphalt, 500 parts of steel slag, 110 parts of ordinary Portland cement, 160 parts of fly ash, hydroxyethyl methyl cellulose ether 5 parts, 30 parts of rubber particles, 3 parts of octene polymer, 8 parts of maleic anhydride, 2 parts of allyl ether, 3 parts of hydroxyethyl acrylate, 2 parts of styrene-butadiene-styrene block copolymer , 3 parts of plasticizer, 1 part of polyester fiber;

[0031] In this embodiment, the steel slag is a mixture of coarse steel slag with a particle size of 10mm and fine steel slag with a particle size of 10mm, and the steel slag has been passivated; the weight ratio of the coarse steel slag to the fine steel slag is 3:1

[0032] In this embodiment, the rubber particles are a mixture of coarse rubber particles with a diameter of 0.5 mm and fine rubber particles with a particle diameter of 0.2 mm...

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Abstract

The invention discloses a steel slag semi-flexible composite pavement structure. The pavement structure sequentially comprises an asphalt concrete surface layer, a steel slag semi-flexible layer, a three-dimensional porous material layer, an old cement board layer subjected to fragmentation and a steel slag base layer from top to bottom, wherein the asphalt concrete surface layer is provided witha structure depth; glass beads loaded with nano titanium dioxide are embedded in the structure depth; three-dimensional communication structures are formed among pores of the three-dimensional porousmaterial, wherein the communication porosity is 50-99%, and the pore diameter is 0.1-20 mm; a specific composite structure layer is adopted, therefore, the shrinkage caused by cooling is relatively small, and relatively small temperature stress is generated to avoid temperature cracks; meanwhile, through interaction of different structural layers of all the layers, mutual tensile stress exists among all the layers, and fatigue cracking can be relieved by combining with use of specific functional materials; and the steel slag semi-flexible composite pavement has excellent high-temperature stability, low-temperature crack resistance, fatigue durability and water stability.

Description

technical field [0001] The invention relates to a pavement structure, in particular to a steel slag semi-flexible composite pavement structure. Background technique [0002] Semi-flexible pavement refers to the pavement formed after pouring cement mortar into the asphalt mixture matrix pavement with large pore size (20% to 25% porosity) and curing for a period of time. It has higher flexibility and high rigidity of asphalt concrete. Relevant studies have shown that semi-flexible pavement can well avoid pavement damage phenomena such as early failure, local wrapping, pavement pumping, and pavement edge cracking, and has excellent high-temperature stability, low-temperature crack resistance, fatigue resistance and anti-fatigue performance. slip performance. After the existing steel slag semi-flexible composite pavement structure is applied to the pavement, the anti-rutting ability of the pavement is enhanced, the overall bearing capacity of the pavement is also improved, and...

Claims

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Application Information

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IPC IPC(8): E01C7/32E01C11/24C04B28/04
CPCE01C7/32E01C11/24C04B28/04C04B2111/0075C04B24/36C04B18/142C04B18/08C04B24/383C04B16/04C04B24/2611C04B24/04C04B24/023C04B24/045C04B16/0683
Inventor 张新永张庆宇张艳娟翟晓静万田宝李恒志
Owner 河北迁曹高速公路开发有限公司
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