High-ductility polymer-rubber powder-honey-combed cement concrete road covering material and construction process thereof

A technology of cement concrete and construction technology, applied in the field of building materials, can solve the problems of poor coordination between the deformation of the cover layer and the underlying structure, low strength and stiffness of the road surface, and increase the cost of materials, so as to ensure sound absorption, noise reduction and water permeability. , The effect of reducing concrete shrinkage and saving aggregate cost

Inactive Publication Date: 2009-01-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cement concrete overlay has the advantages of convenient materials, simple construction, high pavement strength, good stability, and good durability. , loud noise and other disadvantages
The asphalt concrete overlay has the advantages of smooth surface, no joints, comfortable driving, wear resistance, small vibration, low noise, easy maintenance and repair, etc., but the strength and stiffness of the road surface are low, and it is easy to cause rutting, loose peeling, reflection cracks and other damages
[0003] Research on polymer modified porous cement concrete overlay materials has been carried out at home and abroad. The research shows that this type of material has good funct

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Material composition: 300kg of cement per cubic meter, 1586.6kg of 4.75-9.5mm coarse aggregate, 8% of the cement weight in styrene-butadiene latex, 0.33 water-cement ratio, 15% volume ratio of waste rubber powder instead of aggregate, and the prepared cover The 3-day flexural strength of the surface material is 2.60MPa, the compressive strength is 7.75MPa, and the folding ratio is 0.335; the 7-day flexural strength of the prepared cover material is 3.60MPa, the compressive strength is 10.89MPa, and the folding ratio is 0.331; the prepared cover The 28-day flexural strength of the surface material is 5.05MPa, the compressive strength is 14.82MPa, and the folding ratio is 0.341.

Embodiment 2

[0038] Material composition: 360kg of cement per cubic meter, 1557.2kg of 4.75-9.5mm coarse aggregate, 8% of the cement weight in styrene-butadiene latex, 0.33 in water-cement ratio, 15% of waste rubber powder instead of aggregate, and the prepared cover The 3-day flexural strength of the surface material is 3.43MPa, the compressive strength is 10.2MPa, and the folding ratio is 0.336; the 7-day flexural strength of the prepared cover material is 4.91MPa, the compressive strength is 14.7MPa, and the folding ratio is 0.334; the prepared cover The 28-day flexural strength of the surface material is 6.25MPa, the compressive strength is 17.9MPa, and the folding ratio is 0.349.

Embodiment 3

[0040] Material composition: 300kg of cement per cubic meter, 1586.7kg of 4.75-9.5mm coarse aggregate, styrene-acrylic emulsion is 8% of the weight of cement, water-cement ratio 0.32, the volume ratio of waste rubber powder to replace aggregate is 18%, and the prepared cover The 3-day flexural strength of the surface material is 1.43MPa, the compressive strength is 3.59MPa, and the folding ratio is 0.398; the 7-day flexural strength of the prepared cover material is 2.47MPa, the compressive strength is 6.86MPa, and the folding ratio is 0.360; the prepared cover The 28-day flexural strength of the surface material is 5.43MPa, the compressive strength is 15.12MPa, and the folding ratio is 0.359.

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Abstract

Disclosed is a cover material of polymer modification rubber powder porous concrete with high toughness and a making technique thereof. Wherein, in per cubic meter of the concrete, the polymer is 20 to 75 kg, the cement is 200 to 400 kg, and the water to cement ratio is between 0.25 to 0.40 ; in aggregates, the amount of a fine aggregate is less than or equal to 20 percent, and the amount of a coarse aggregate is more than or equal to 80 percent; 0 to 5 kg of plasticizer and/ or defoamer are/is added; rubber powder, whose volume fraction is not more than 50 percent, is used to replace the natural aggregate ; or the cement is replaced by mineral admixtures which are not more than 40 percent. The cover material is made by a small machine, a three-roller and an asphalt paver. The main technical parameters of the cover material are as follows: compressive strength is more than or equal to 15 MPa, flexural strength is more than or equal to 5 MPa, anti-skid structure depth is more than or equal to 2.0 mm, porosity is 18 to 22 percent, permeability coefficient is more than or equal to 1.5 mm/s, sound absorption coefficient is more than or equal to 0.30, and noise reduction effect is more than or equal to 5 dB. The cover material can comprehensively utilize the discarded rubber with the advantages of high toughness, sliding resistance and sound absorption and noise reduction. Thus, the cover material is applicable to the covers of the highway, the municipal road and the flat.

Description

technical field [0001] The invention belongs to building materials, in particular to a high-toughness polymer-rubber powder-porous cement concrete road overlay material and a construction process. Background technique [0002] At present, the overlay materials of high-grade highways mainly include cement concrete and asphalt concrete. The cement concrete overlay has the advantages of convenient material acquisition, simple construction, high pavement strength, good stability, and good durability, but it has poor driving comfort, poor coordination between the overlay and the underlying structure, and is prone to damage due to joints , Noisy and other shortcomings. Asphalt concrete overlay has the advantages of flat surface, no joints, comfortable driving, wear resistance, small vibration, low noise, easy maintenance and repair, etc., but the strength and stiffness of the road surface are low, and it is easy to cause damage such as rutting, loose spalling, and reflection crac...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B38/00C04B18/22
CPCC04B28/065C04B28/06C04B28/04Y02W30/91C04B14/02C04B20/0096C04B24/24C04B24/2611C04B24/2641C04B24/2676C04B24/2682C04B24/36C04B38/08C04B40/0067C04B2103/30C04B2103/50C04B14/10C04B14/28C04B18/08C04B18/141C04B18/22C04B18/12
Inventor 沈卫国周明凯李北星徐方张涛蔡智曾威
Owner WUHAN UNIV OF TECH
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