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Cement concrete pavement and dual-layer paving method

A technology of cement concrete and concrete, which is applied to cohesive pavement paved on site, roads, roads, etc., which can solve the problems of waste pavement materials not being suitable for cement pavement, reduced anti-skid performance, and increased material costs, so as to improve frost resistance The ability to melt and destroy, improve the anti-skid performance, and reduce the effect of pollutants

Active Publication Date: 2015-04-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] (1) At present, ordinary concrete aggregates are mainly natural sand and gravel, which are non-renewable resources. Mechanical mining not only destroys the natural ecological environment, but also causes environmental pollution
However, the construction waste generated from the demolition of old pavements is usually disposed of in open-air piles or landfills, which has caused serious environmental pollution and caused more and more social and environmental problems.
Recycling of old pavement materials has become a hot research direction, but due to various defects of waste pavement materials, waste pavement materials are not suitable for the surface layer of cement pavement, which is an urgent problem to be solved
[0005] (2) In order to improve the service life of the cement pavement, the requirements for the surface layer materials are often high, and the local aggregate may not meet the requirements, so it is necessary to purchase the aggregate from a remote place and need to go through long-distance transportation, which will undoubtedly increase the cost of the material. cost
With the development of economic construction, the grade of highways has been continuously improved, the traffic volume has increased, and the speed of vehicles has accelerated. The problem of anti-skid on cement pavement has become increasingly prominent, especially in the rainy season. Casualties, property damage and other major accidents

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  • Cement concrete pavement and dual-layer paving method

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Embodiment 1

[0036] A kind of cement concrete pavement, described cement concrete pavement lays on the roadbed that is made up of asphalt isolation sealing layer 3 and cement stable base, and described cement concrete pavement comprises the recycled aggregate concrete lower layer paved on asphalt isolation sealing layer 3 2 and the concrete upper layer 1 paved on the lower layer 2 of the recycled aggregate concrete, the cement stabilized base layer 4 has a thickness of 20cm, the asphalt isolation seal layer 3 has a thickness of 5cm, and the concrete upper layer 1 is cut with a joint for caulking Sealed transverse joints 5 and longitudinal joints 6, the lower layer 2 of recycled aggregate concrete is provided with reinforced steel bars.

[0037] Further, the thickness of the concrete upper layer 1 is 4-15cm, the thickness of the concrete upper layer 1 in this embodiment is 4mm, and the thickness of the recycled aggregate concrete lower layer 2 is 15-40cm, and the recycled aggregate concrete ...

Embodiment 2

[0041]A kind of cement concrete pavement, described cement concrete pavement lays on the roadbed that is made up of asphalt isolation sealing layer 3 and cement stable base, and described cement concrete pavement comprises the recycled aggregate concrete lower layer paved on asphalt isolation sealing layer 3 2 and the concrete upper layer 1 paved on the lower layer 2 of the recycled aggregate concrete, the cement stabilized base layer 4 has a thickness of 20cm, the asphalt isolation seal layer 3 has a thickness of 5cm, and the concrete upper layer 1 is cut with a joint for caulking Sealed transverse joints 5 and longitudinal joints 6, the lower layer 2 of recycled aggregate concrete is provided with reinforced steel bars.

[0042] Further, the thickness of the concrete upper layer 1 is 4-15cm, the thickness of the concrete upper layer 1 in this embodiment is 15mm, and the thickness of the recycled aggregate concrete lower layer 2 is 15-40cm, and the recycled aggregate concrete ...

Embodiment 3

[0046] A double-layer paving method for cement concrete pavement, comprising steps:

[0047] Step 1. Mixing materials. Mix the cement concrete mixture of the upper and lower layers at the mixing station according to the specified mix ratio. The materials for the upper layer of concrete 1 include coarse aggregate composed of crushed stones and sand for road concrete. Fine aggregate, cement, water, the particle size of the crushed stone is greater than 4mm-19mm, the Los Angeles abrasion value is less than 20, the stone polishing value is greater than 40, the water-cement ratio is ≤0.45, the porosity is ≥5%, and the amount of cement is ≥425kg / m 3 ; The materials used for the lower layer 2 of recycled aggregate concrete include coarse aggregate composed of mixed stone, fine aggregate composed of sand for pavement concrete, cement, water, water-cement ratio ≤ 0.45, void ratio ≥ 3%, cement dosage ≥ 375kg / m 3 , the mixed stone is composed of 50%-70% recycled materials and 30%-50% ...

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Abstract

The invention discloses a cement concrete pavement. The cement concrete pavement is paved on an embankment comprising an asphalt isolation sealing layer and a cement-stabilized base layer and comprises a regenerative aggregate concrete lower layer paved on the asphalt isolation sealing layer and a concrete upper layer paved on the regenerative aggregate concrete lower layer, seams for sealing joints are cut on the concrete upper layer and reinforced steel bars are arranged inside the regenerative aggregate concrete lower layer. The invention also provides a dual-layer paving method for the cement concrete pavement. Compared with the traditional cement concrete pavement, the cement concrete pavement has the advantages that the performance of the surface layer can be improved, the freeze-thaw damage resistance is increased, noise is reduced, the skid resistance is improved, the service life is prolonged, the effects of utilizing waste materials, protecting the environment and reducing pollution are achieved, and the surface layer material can be recycled; and the cement concrete pavement has tremendous business prospects and economic benefits and can be widely used in the field of road transport construction.

Description

technical field [0001] The invention relates to a concrete pavement and a construction method, in particular to a cement concrete pavement and a double-layer paving method thereof. Background technique [0002] Due to its high strength, good stability, no rutting, good durability, moderate cost, and good visibility when driving at night, cement pavement has been valued by the road departments of various countries. [0003] However, cement pavement also has some problems that need to be improved. [0004] (1) At present, ordinary concrete aggregates are mainly natural sand and gravel, which are non-renewable resources. Mechanical mining not only destroys the natural ecological environment, but also causes environmental pollution. However, the construction waste generated from the demolition of old pavements is usually disposed of in open-air piles or landfills, which has caused serious environmental pollution and caused more and more social and environmental problems. Recyc...

Claims

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Application Information

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IPC IPC(8): E01C3/00E01C7/32E01C11/04E01C11/14E01C11/18
CPCE01C7/32E01C11/04E01C11/14E01C11/18E01C11/24E01C19/4826
Inventor 胡迟春马杰贤李林生许薛军
Owner SOUTH CHINA UNIV OF TECH