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Method for regenerating aggregate concrete from steel fibre rubber granule modified asphalt

A technology of rubber granules and recycled aggregates, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of less than 30% recycling rate, non-degradable waste rubber, efficient energy waste, etc. Achieve the effect of improving energy consumption, reducing thermal conductivity and improving thermal insulation performance

Inactive Publication Date: 2009-03-11
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0003] On the other hand, with the development of the national economy, waste rubber products are increasing day by day. According to statistics, my country currently consumes more than 20,000 tons of rubber per year, and the recycling rate is less than 30%.
Waste rubber is not easy to degrade, and it will pollute the environment after landfilling. Incineration will also bring air pollution. How to deal with the increasing waste rubber has become a serious environmental problem.
At the same time, if the waste rubber can not be rationally utilized, it will also cause a waste of effective energy.

Method used

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  • Method for regenerating aggregate concrete from steel fibre rubber granule modified asphalt

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Embodiment Construction

[0027] The implementation steps of the present invention are as follows:

[0028] (1) The recycled aggregate is crushed by the waste concrete through the crusher, and the debris other than the concrete is sorted, and then passed through a mesh screen to screen out the recycled coarse aggregate with a size between 4.00mm and 30.00mm, and clean it After washing, let it dry naturally.

[0029] (2) Put the emulsified asphalt and the dried recycled aggregate into the mixer for stirring, so that the emulsified asphalt is spread on the surface of the recycled aggregate.

[0030] (3) Steel fiber rubber particles are obtained from waste tires through a crusher through coarse crushing, sorting, cleaning, and drying. The size is 1 mesh to 5 mesh, and the length of the steel wire is the natural cut-off length of the crusher.

[0031] (4) Put sand, cement, steel fiber rubber particles, emulsified asphalt recycled aggregates and primary stones into the mixer in proportion to mix evenly, th...

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Abstract

The invention discloses a method for preparing steel fiber rubber particle modified asphalt recycled aggregate concrete. In the method, waste concrete is subjected to crushing, separating, screening, washing and drying to obtain the recycled aggregate, and the recycled aggregate is stirred with emulsified asphalt until the emulsified asphalt is covered on the surface of the recycled aggregate; waste tire is subjected to coarse crushing, separating, washing and drying to obtain the steel fiber rubber particle; and the recycled aggregate containing the emulsified asphalt, steel fiber rubber particles, natural aggregate, cement, sand and water are stirred according to certain ratio to obtain the steel fiber rubber particle modified asphalt recycled aggregate concrete. In the invention, the waste tire is subjected to crushing process to produce the steel fiber rubber, and the crack resistance, the heat preservation capability and the energy absorption and noise reduction capability of the asphalt recycled aggregate concrete are effectively improved by the modification of the steel fiber rubber; and the material is a circular economy building material, and by producing the material, the environmental pollution is reduced, and the performance of the material can be improved under the condition of not increasing cost.

Description

technical field [0001] The invention relates to building engineering materials, in particular to a method for preparing steel fiber rubber particles modified asphalt recycled aggregate concrete produced by crushing waste tires. Background technique [0002] The development and application of recycled concrete, on the one hand, can use a large amount of waste concrete, which can be used as recycled aggregate to replace natural aggregate after treatment, thereby reducing the consumption of natural aggregate in the construction industry; on the other hand, the development and application of recycled concrete can It fundamentally solves the problems of increasing shortage of natural aggregates and the deterioration of the ecological environment caused by a large amount of concrete waste, and ensures the sustainable development of human society. However, recycled aggregate concrete has the following disadvantages. There are many fine cracks at the aggregate interface, and the bon...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/16C04B18/22C04B14/48
CPCC04B26/26Y02W30/91C04B7/00C04B14/02C04B14/06C04B14/48C04B18/02C04B18/22
Inventor 郭永昌李丽娟刘锋谢志红朱江
Owner GUANGDONG UNIV OF TECH
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