High-viscosity super-elastic anti-reflection crack stress absorption layer and construction method thereof

A stress-absorbing layer and reflective cracking technology, which is applied to cohesive pavement paved on site, roads, roads, etc., can solve problems such as inability to meet road performance requirements, achieve good stress absorption and dispersion capabilities, and suppress the occurrence of reflective cracks , Improve the effect of tensile strength

Inactive Publication Date: 2019-09-27
广州市交通设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary emulsified asphalt, fiber and gravel are the main materials, which are sprayed on the road surface through special equipment, and fiber is added to improve the tensile performance of the road surface to prevent the spread of reflective cracks. With the increasing traffic volume, this technology Can no longer meet the current road performance requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A stress-absorbing layer for high-viscosity super-elastic anti-reflection cracks, comprising a layer of stress-absorbing bonding layer, a layer of fiber yarn, a layer of stress-absorbing bonding layer and a layer of coarse aggregate in sequence from top to bottom, wherein The material of the stress-absorbing bonding layer is polymer high-viscosity asphalt, the spraying temperature is 185°C, the spraying amount is 1.8L / ㎡, the material of the fiber yarn is alkali-free sprayed yarn, the spraying amount is 40g / ㎡, and the coarse aggregate is a single Particle size gravel, spreading amount is 8m 3 / K ㎡, the coverage rate is 85%.

Embodiment 2

[0028] A stress-absorbing layer for high-viscosity super-elastic anti-reflection cracks, comprising a layer of stress-absorbing bonding layer, a layer of fiber yarn, a layer of stress-absorbing bonding layer and a layer of coarse aggregate in sequence from top to bottom, wherein The material of the stress-absorbing bonding layer is polymer high-viscosity asphalt, the spraying temperature is 187°C, the spraying amount is 1.9L / ㎡, the material of the fiber yarn is alkali-free sprayed yarn, the spraying amount is 60g / ㎡, and the coarse aggregate is a single Particle size crushed stone, spreading amount is 10m 3 / K ㎡, the coverage rate is 90%.

Embodiment 3

[0030] A stress-absorbing layer for high-viscosity super-elastic anti-reflection cracks, comprising a layer of stress-absorbing bonding layer, a layer of fiber yarn, a layer of stress-absorbing bonding layer and a layer of coarse aggregate in sequence from top to bottom, wherein The material of the stress-absorbing bonding layer is polymer high-viscosity asphalt, the spraying temperature is 190°C, the spraying amount is 2.0L / ㎡, the material of the fiber yarn is alkali-free sprayed yarn, the spraying amount is 80g / ㎡, and the coarse aggregate is a single Particle size gravel, spreading amount is 12m 3 / K ㎡, the coverage rate is 95%.

[0031] The required materials and construction requirements

[0032] Crushed stone: the stone should be hard, dry, clean, free of weathered particles, and close to cubic particles. The crushed stone rolled by an impact crusher should be used. The stone should be hard stone such as diabase or basalt. .

[0033] Polymer high-viscosity asphalt: It ...

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PUM

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Abstract

The invention discloses a high-viscosity super-elastic anti-reflection crack stress absorption layer and a construction method thereof. The high-viscosity super-elastic anti-reflection crack stress absorption layer sequentially comprises a stress absorption bonding layer, a layer of fiber yarns, a stress absorption bonding layer and a layer of coarse aggregate from top to bottom, wherein the material of the stress absorption bonding layer is polymer high-viscosity asphalt, the material of the fiber yarns is alkali-free jet yarns, the coarse aggregate is crushed stone with a single particle size, the fibers which are evenly distributed and mutually in overlapped joint in a disordered direction in asphalt combining materials which are evenly spread on the upper and lower layers, and the asphalt combining materials form a network winding structure, the unique structure has higher tension and elasticity, the comprehensive mechanical properties such as tensile strength, shear strength, compression resistance, impact resistance and the like of the layer are effectively improved, the bonding force and the stability of an additionally paved pavement and an original pavement are improved, a high absorption and dispersion function for stress is achieved, the occurrence of reflection cracks can be effectively inhibited, and therefore the service life of the road is prolonged.

Description

technical field [0001] The invention relates to the technical field of road building construction, in particular to a stress-absorbing layer for high-viscosity super-elastic anti-reflection cracks and a construction method thereof. Background technique [0002] The stress absorbing layer first appeared in the United Kingdom, and has been widely used in the United Kingdom, the United States, Australia, France, etc. Ordinary emulsified asphalt, fiber and gravel are the main materials, which are sprayed on the road surface through special equipment, and fiber is added to improve the tensile performance of the road surface to prevent the spread of reflective cracks. With the increasing traffic volume, this technology It has been unable to meet the current road performance requirements. In order to meet the requirements of contemporary and future traffic flow on roads, the process and materials are in urgent need of improvement and improvement. The FMA / FME stress-absorbing layer...

Claims

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Application Information

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IPC IPC(8): E01C7/35
CPCE01C7/353
Inventor 王蕾黄伟丘伟陈启明刘德权周明强张光先张益华凌云关汉辉
Owner 广州市交通设计研究院有限公司
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