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Water-proof crack-resistant layer for highway

An anti-crack layer, highway technology, applied in the direction of roads, roads, buildings, etc., can solve the problems of water damage and pavement cracks in the road base of highways, and achieve the effects of preventing early water damage, good high and low temperature performance, and excellent waterproof performance.

Active Publication Date: 2011-04-27
XINGTAI ROAD & BRIDGE CONSTR GENERAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The upper layer of the existing highway road is a compact structure, which cracks at low temperature, causing cracks in the road surface, rain and snow seeping into the road structure layer, causing water damage to the road base layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Made from the following raw materials: 3.63kg crushed stone, 5.61kg natural sand, 1.76kg asbestos powder, 0.066kg basalt fiber, 1.32kg polymer modified asphalt (5°C ductility: 45cm; penetration: 5.0mm , softening point: 90°C).

[0018] Preparation method: Mix the above raw materials uniformly at 165°C to 195°C to obtain a modified asphalt mixture, and use ordinary asphalt construction equipment to mix, pave and roll the modified asphalt mixture to obtain the road waterproof split layer. The waterproof and anti-cracking layer of the road is laid on the lower part of the upper layer of the road.

[0019] Test results of modified asphalt mixture: stability 9.1kN, dynamic stability 3100 times / mm, porosity 0.4%, water permeability coefficient 0.7mL / min, -15°C tensile strength 1.72MPa, 25°C shear strength 1.69Mpa , -10 ℃ low temperature bending test failure strain is 24426με. The detection method adopts the routine detection method stipulated in JTG F40-2004 "Technical Spe...

Embodiment 2

[0021] It is made of the following raw materials: 5kg of gravel, 30kg of natural sand, 13.5kg of asbestos powder, 1.5kg of basalt fiber, polymer modified asphalt (5°C ductility: 40cm; penetration: 6.0mm; softening point: 80°C) 9.7kg.

[0022] Preparation method: with embodiment 1.

[0023] Test results of modified asphalt mixture: stability 8.0kN, dynamic stability 2100 times / mm, porosity 0.2%, water permeability coefficient 0.5mL / min, -15°C tensile strength 1.50MPa, 25°C shear strength 1.58Mpa , -10 ℃ low temperature bending test failure strain is 27397με. The detection method adopts the routine detection method stipulated in JTG F40-2004 "Technical Specifications for Construction of Highway Asphalt Pavement".

Embodiment 3

[0025] It is made of the following raw materials: 35kg of gravel, 14.95kg of asbestos powder, 0.05kg of basalt fiber, polymer modified asphalt (5°C ductility: 45cm; penetration: 6.5mm; softening point: 95°C) 7.5 kg.

[0026] Preparation method: with embodiment 1.

[0027] Test results of modified asphalt mixture: stability 8.4kN, dynamic stability 2400 times / mm, porosity 0.35%, water permeability coefficient 0.66mL / min, -15°C tensile strength 1.62MPa, 25°C shear strength 1.60Mpa , -10 ℃ low temperature bending test failure strain is 25130με. The detection method adopts the routine detection method stipulated in JTG F40-2004 "Technical Specifications for Construction of Highway Asphalt Pavement".

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Abstract

The invention discloses a water-proof crack-resistant layer for a highway, which is formed by mixing polymer modified asphalt and aggregate of 165 DEG C to 195 DEG C and blending, spreading and grinding by using conventional asphalt mixture construction equipment. The water-proof crack-resistant layer for the highway is used for preventing the highway road from being damaged by water because of cold cracking and infiltration of rain or snow into the road base of the highway, has the characteristics of simple and convenient construction operation, high water-proof crack resistance and high and low temperature stability, and is a water-proof crack-resistant structural layer which is formed by hot mixing and spreading and has excellent high and low temperature properties, high density and high strength.

Description

technical field [0001] The invention relates to the technical field of road structures, in particular to a waterproof and anti-crack layer for roads. Background technique [0002] Existing roads are mostly paved with cement concrete or asphalt mixture. According to the requirements of highway technical specifications, the pavement surface layer is divided into three-layer structure or two-layer structure. The three-layer structure is divided into surface layer and middle surface layer from top to bottom. 1. The lower layer. The two-layer structure is divided into the surface layer and the lower layer from top to bottom. The composition and design of the asphalt mixture commonly used in each layer of the surface layer should be based on its layer thickness and layer position, temperature and rainfall and other climatic conditions. Factors such as traffic volume and traffic composition are considered comprehensively. The upper layer of the existing highway road is a compact s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/18E01C7/22C04B14/06C04B14/38C04B14/40
Inventor 李来宾霍玉娴王中合石晨英王凤彩李殿双李利华马朝波郭彦群李文清
Owner XINGTAI ROAD & BRIDGE CONSTR GENERAL
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