Method for preparing recycled aggregate concrete from steel fiber rubber and slag

A technology of recycled aggregate and steel fiber, applied in the field of construction engineering materials, can solve the problems of less than 30% recycling rate, non-degradable waste rubber, effective energy waste, etc. and physical properties, the effect of improving impermeability

Active Publication Date: 2010-07-14
GUANGDONG DIANBAI CONSTR GRP
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  • Abstract
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Problems solved by technology

[0003] 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...

Method used

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  • Method for preparing recycled aggregate concrete from steel fiber rubber and slag
  • Method for preparing recycled aggregate concrete from steel fiber rubber and slag
  • Method for preparing recycled aggregate concrete from steel fiber rubber and slag

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Embodiment Construction

[0025] The implementation steps of the present invention are as follows:

[0026] (1) The recycled aggregate of waste concrete is broken by the waste concrete through the crusher, and the debris other than concrete is sorted, and then passed through a mesh screen to screen out the recycled aggregate with a size ranging from 5mm to 30mm, and it is cleaned with water After that, let it dry naturally.

[0027] (2) Steel fiber rubber particles are obtained from waste tires through a crusher through coarse crushing, sorting, cleaning, and drying. The length at which the steel wire is naturally cut off.

[0028] (3) The steel slag is crushed, screened, magnetically separated, air-selected and classified to obtain steel slag powder.

[0029] (4) Pour the mixture of cement and steel slag powder, water, sand, natural coarse aggregate, waste concrete recycled aggregate, and steel fiber rubber particles in a mass ratio of 1:0.5:1.5:0~3:0~3:0.05~1 Put it into a mixer and stir evenly to...

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Abstract

The invention discloses a method for preparing recycled aggregate concrete from steel fiber rubber and slag. The method comprises the following steps: waste concrete is crushed, separated, screened, washed and dried to obtain waste concrete recycled aggregate; waste tires are coarsely crushed, separated, washed and dried to obtain steel fiber rubber particles; the slag is crushed, screened, magnetically separated and classified by air to obtain slag powder; the waste concrete recycled aggregate, the steel fiber rubber particles, cement slag powder mixture, natural coarse aggregate, sands and water are stirred in proportion; the cracking resistance, thermal insulation performance and energy absorbing and noise reducing performance of the recycled aggregate concrete can be effectively improved by modifying the steel fiber rubber particles; the working performance of green concrete and contraction performance of the concrete in each curing time can be improved by modifying the slag powder; and the infiltration resistance and carbonization resistance can be effectively improved and chloride ion diffusion velocity of the concrete can be effectively reduced. The material is a cycled economical building material, and can improve the material performance on the basis of not increasing cost.

Description

technical field [0001] The invention belongs to construction engineering materials, in particular to a preparation method of recycled aggregate concrete modified by steel fiber rubber particles and steel slag powder. Background technique [0002] The development and application of recycled concrete 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; the development and application of recycled concrete has also fundamentally solved the problem of The increasing shortage of natural aggregates and the deterioration of the ecological environment caused by a large amount of concrete waste ensure the sustainable development of human society. However, waste concrete aggregate has lower density, higher water absorption and lower strength than ordinary aggregate. Because there are more cement mortars attached to the surface o...

Claims

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Application Information

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IPC IPC(8): B28C5/00C04B18/22
CPCY02A30/244Y02W30/91
Inventor 郭永昌李丽娟黄海滨刘锋冯文贤钟根全吴炎海
Owner GUANGDONG DIANBAI CONSTR GRP
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