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New road surface structure layer

A kind of pavement structure and new technology, applied in the direction of roads, roads, condensed pavement paved on site, etc., can solve the problems of reducing waterproof performance, road water damage, pavement pulling, etc., to improve the ability to resist rutting, extend the road Longevity, effect of preventing lateral displacement

Active Publication Date: 2005-03-02
XINGTAI ROAD & BRIDGE CONSTR GENERAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current pavement structure is roughly divided into surface layer, base layer, and subgrade from top to bottom. The surface layer is divided into upper layer and lower layer. At present, the following problems exist in the surface layer and the base layer: 1. The waterproofing of the base layer is basically to spray the permeable layer on the top of the base layer. Composed of oil and sealant oil, when the base layer cracks, it will follow the base layer and reduce the waterproof performance. When the road surface is water-permeable or the road surface is cracked and water-permeable, the base layer will be damaged, causing early water damage to the road surface
2. The existing pavement base layer is composed of densely graded inorganic materials, with a large temperature coefficient and severe low-temperature cracking. Part of it will be reflected to the pavement surface layer, causing the pavement to pull apart and cause early damage
3. Expansion joints must be installed on the existing cement concrete pavement, which not only brings discomfort and high noise to driving, but also easily causes road surface water damage due to expansion joints
4. The existing porous ordinary cement concrete surface layer has low flexural strength and cannot meet the technical requirements of highway pavement

Method used

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Effect test

Embodiment 1

[0022] The material components of porous modified cement concrete are calculated by weight: 500 kilograms of cement; 1800 kilograms of crushed stones with a particle size of 20 mm; 160 kilograms of water; 24 kilograms of cement modifier; the prepared porous modified cement concrete test block , its compressive strength is: 30.3Mpa, flexural strength 5.0Mpa, porosity 6.8%.

Embodiment 2

[0024] The material components of porous modified cement concrete are calculated by weight: 200 kilograms of cement; 1400 kilograms of crushed stones with a particle size of 5 mm; 100 kilograms of water; 5 kilograms of cement modifier; the prepared porous modified cement concrete test block , the compressive strength is: 3.5Mpa, the flexural strength is 1.3Mpa, and the porosity is 25%.

Embodiment 3

[0026] The material components of the porous modified cement concrete are by weight: 300 kilograms of cement; 1500 kilograms of crushed stones with a particle size of 10 mm; 115 kilograms of water; 17.25 kilograms of cement modifier; the prepared porous modified cement concrete test block , its compressive strength is: 15Mpa, flexural strength 2.5Mpa, porosity 22%.

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Abstract

The new type of road surface structure includes the lower porous modified cement concrete structure layer, base layer and waterproof layer set between the lower layer and the base layer. The porous cement concrete has the components of cement 200-500 weight portions, equal size crushed stone of 5-40 mm size 1000-1800 weight portions, water 100-180 weight portions, and cement modifier of 2-30 % of water. The said road surface structure has high bearing capacity, simple construction, small temperature sensitivity, high low temperature cracking resistance, good high temperature stability, proper toughness, strong impact resistance, high water resistance and excellent attenuation resistance. It is a ideal lasting road surface structure.

Description

Technical field: [0001] The present invention relates to a pavement structure layer, that is, the underlayer of the pavement. Background technique: [0002] The current pavement structure is roughly divided into surface layer, base layer, and subgrade from top to bottom. The surface layer is divided into upper layer and lower layer. At present, the following problems exist in the surface layer and the base layer: 1. The waterproofing of the base layer is basically to spray the permeable layer on the top of the base layer. Composed of oil and seal oil, when the base layer cracks, it will crack with the base layer, reducing the waterproof performance. When the road surface is permeable or the road surface is cracked and water-permeable, the base layer will be damaged, causing early water damage to the road surface. 2. The existing pavement base layer is composed of densely graded inorganic materials, which has a large temperature coefficient and severe low-temperature cracking...

Claims

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Application Information

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IPC IPC(8): E01C7/14
Inventor 李来宾霍玉娴石文军郑义坤王娟高艳丽王凤彩李利华
Owner XINGTAI ROAD & BRIDGE CONSTR GENERAL
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