Road cement concrete rubber particle surface modifier

A technology of cement concrete and surface modifier, which is applied in the fields of material science and engineering science, can solve the problems affecting the application of rubber particle cement concrete, the overall utilization rate is less than 20%, and the interface bonding performance is problematic, so as to achieve large practical application Value and social value, simple and convenient processing and production, and the effect of improving the flexural strength

Inactive Publication Date: 2008-09-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the overall utilization rate of waste rubber is still less than 20%, and the desulfurization process used in the tire retreading and recycled rubber production process is polluting and energy-intensive, which is not conducive to environmental protection
However, there are still problems with the interface bonding performance between rubber particles and cement substrates, which affects the application of rubber particle cement concrete in road engineering.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Firstly, it is measured as bis-(γ-triethoxysilylpropyl)tetrasulfide:vinyltriethoxysilane:water=0.1:0.1:99.8wt.%. The above materials are commercially available. Then use an ordinary mixer, put all the measured materials in and stir for 10-30 seconds. Compared with the cement concrete prepared with rubber particles treated with this formula modifier, the compressive strength can be increased by 20%, and the flexural resistance can be increased by 20% under the same fluidity. The strength can be increased by 10%, and the bending toughness can be increased by 30%.

Embodiment 2

[0023] Use γ-(methacryloyloxy)propyltrimethoxysilane: bis-(γ-triethoxysilylpropyl) tetrasulfide: vinyltriethoxysilane: water = 1:1:1 : 97wt.% metering, the above-mentioned materials are commercially available. Then use an ordinary mixer, put all the measured materials in and stir for 10-30 seconds. Compared with the untreated rubber particle cement concrete, the cement concrete prepared by the rubber particles treated with this formula modifier can increase the compressive strength by 30%, the flexural strength by 20%, Bending toughness can be increased by 30%.

Embodiment 3

[0025] Using γ-(methacryloyloxy)propyltrimethoxysilane: bis-(γ-triethoxysilylpropyl) tetrasulfide: vinyltriethoxysilane: water=5:10:10 : 75wt.% metering, the above-mentioned materials are commercially available. Then use an ordinary mixer, put all the measured materials in and stir for 10-30 seconds. Compared with the untreated rubber particle cement concrete, the cement concrete prepared by the rubber particles treated with this formula modifier can increase the compressive strength by 30%, the flexural strength by 30%, Bending toughness can be increased by 40%.

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PUM

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Abstract

The invention discloses a rubber particle surface modifier for road cement concrete, which relates to a wasted rubber particle surface modifier used in road-use cement concrete. The mixture ratio of the modifier is as above: the modifier has wild material source, low price and convenient manufacture, which can carry out the modification treatment to the rubber particles in a wasted rubber particle processing plant or a concrete mixing location, the modified rubber particles can be directly packaged in a damp state or be properly dried and packaged to leave the factory. Compared with the unmodified rubber particle one, the cement concrete prepared by modified wasted rubber particles can increase the compressive strength by 20%, the breaking strength by 10%-30% and the flexural toughness by 30%-50% under the condition of the same fluidness, thereby having valuable economic and social benefit.

Description

technical field [0001] The invention relates to a surface modifying agent for waste rubber particles. When the waste rubber modified by the modifier is used in road cement concrete, the waste rubber can be digested and utilized, and the structure and performance of the road surface can be improved. It belongs to the field of material science and engineering science and technology. Background technique [0002] With the rapid development of the automobile industry, the amount of waste tires is also increasing year by year. According to relevant statistics, in 2005, the number of automobiles in my country was 33 million, and the production of waste tires was about 120 million. It is estimated that by 2010, the number of automobiles in my country will reach 70 million, and the production of waste tires will reach 200 million. If waste tires are not disposed of properly, it will cause serious environmental pollution and waste of resources. How to deal with the increasing wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/22C04B20/10
CPCC04B2111/0075C04B41/009C04B41/4922
Inventor 马一平谈至明刘晓勇杨若冲
Owner TONGJI UNIV
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