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Preparation method of waste brick aggregate

A technology of aggregates and granules, applied in solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of reduced compressive strength of environmentally friendly bricks, insufficient compressive strength of concrete, and inability to meet application requirements, etc. Achieve the effect of improving compressive strength and compressive strength

Inactive Publication Date: 2021-01-08
北京联绿技术集团有限公司
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The experimental results show that the type of recycled aggregate has a significant impact on the compressive strength of environmentally friendly bricks. The increase in concrete in recycled aggregates increases the compressive strength of environmentally friendly bricks, while the increase in the content of clay bricks in recycled aggregates increases the compressive strength of environmentally friendly bricks. Significantly lower strength
[0009] However, in the prior art, when using construction waste bricks to make aggregates, the compressive strength of the resulting concrete is often not high enough to meet some specific application requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Take abandoned ordinary house building bricks, crush the building waste bricks with a jaw crusher, and then sieve out waste brick particles with a particle size of 2-20mm, dry the particles at a temperature of 110°C for 1.2 hours, and then The dried waste brick particles are immersed in the ethanol solution of polyvinylpyrrolidone (the concentration of polyvinylpyrrolidone is 1.5wt%), stirred at a speed of 20rpm, and the stirring time is 1.5h, then the soaked waste brick particles are taken out, After drying, the waste brick aggregate after impregnation is placed in a wire mesh hanging basket, placed in the prepared cement paste (the water-to-binder ratio of the cement paste is 1.3), taken out by shaking and shaking for 3 minutes, and cured at room temperature for 3 days Test for crush strength. The crushing strength is tested according to GB / T 14685-2011. After testing, the compressive strength of the test block is 11.46MPa.

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Abstract

The invention provides a preparation method of waste brick aggregate, which comprises the following steps of crushing waste bricks, screening out waste brick particles with the particle size of 2-20 mm, and treating the waste brick particles with polyvinylpyrrolidone to prepare the waste brick aggregate. By means of the method, the prepared waste brick aggregate has higher compressive strength.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of waste brick aggregate and the prepared waste brick aggregate. Background technique [0002] With the steady development of my country's national economy and the acceleration of urbanization, a large number of old buildings have been demolished, and the construction waste generated is also increasing. A large amount of construction waste is transported to the suburbs or around the city for landfill or open storage. It wastes land and resources and pollutes the environment. It is estimated that my country's cities produce about 7 billion tons of garbage every year, and it is still growing, of which construction waste is about 3.3 billion tons, accounting for about 50% of the total urban garbage. Most of the demolished buildings are brick-concrete structures. In the construction waste generated by the demolition of these buildings, cons...

Claims

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Application Information

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IPC IPC(8): C04B20/04C04B20/02C04B20/10C04B28/00C04B18/16
CPCC04B20/02C04B20/026C04B20/04C04B20/1033C04B28/00C04B2201/50C04B18/16C04B18/08Y02W30/91
Inventor 韩雪松
Owner 北京联绿技术集团有限公司
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