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Modified recycled aggregates and preparation method therefor

A technology of recycled concrete and recycled aggregate, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve the problems of rough surface of recycled aggregate, high porosity, low compressive strength of recycled concrete, etc. Achieve the effect of reducing porosity and water absorption, improving cohesion, and reducing the temperature difference between inside and outside

Active Publication Date: 2019-04-12
中建西部建设北方有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, compared with natural aggregate, the surface of recycled aggregate is rough and the porosity is large, and when it is applied to recycled concrete, the compressive strength of recycled concrete after solidification is low

Method used

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  • Modified recycled aggregates and preparation method therefor
  • Modified recycled aggregates and preparation method therefor

Examples

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Effect test

Embodiment 1

[0028] A modified lightweight recycled aggregate. The preparation method comprises soaking the lightweight recycled aggregate in a modifying solution for 1 hour. In parts by weight, the modifying solution includes: 60 parts of water glass with a mass concentration of 5%, silane di 5 parts of joint agent, 10 parts of silicone resin, 5 parts of kaolin.

Embodiment 2

[0030] A modified lightweight recycled aggregate. The preparation method comprises soaking the lightweight recycled aggregate in a modifying solution for 2 hours. In parts by weight, the modifying solution includes: 70 parts of water glass with a mass concentration of 5%, silane di 7 parts of joint agent, 15 parts of silicone resin, 8 parts of kaolin.

Embodiment 3

[0032] A modified lightweight recycled aggregate. The preparation method comprises soaking the lightweight recycled aggregate in a modifying solution for 3 hours. In parts by weight, the modifying solution includes: 80 parts of water glass with a mass concentration of 5%, silane di 10 parts of joint agent, 20 parts of silicone resin, 10 parts of kaolin.

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Abstract

The invention belongs to the technical field of reclaimed concrete and discloses a preparation method for modified recycled aggregates. The method comprises the step of soaking recycled aggregates ina modification solution for 1 to 3 hours, wherein the modification solution comprises the ingredients in parts by weight: 60-80 parts of water glass with a mass concentration of 5%, 5-10 parts of silane coupler, 10-20 parts of silicone resin and 5-10 parts of kaolin. Prepared modified reclaimed concrete has relatively low porosity. The invention further discloses reclaimed concrete. The reclaimedconcrete comprises the following ingredients in parts by weight: 250-300 parts of cement, 80-130 parts of fly ash, 50-85 parts of mineral powder, 685-735 parts of sand, 646-874 parts of gravels, 202-398 parts of the modified recycled aggregates, 140-175 parts of water, 5-9 parts of water reducer and 10-15 parts of glass fibers. The prepared reclaimed concrete still has relatively high compressivestrength under the condition that a large volume of reclaimed concrete is utilized.

Description

technical field [0001] The invention relates to the technical field of recycled concrete, in particular to a modified recycled aggregate and a preparation method of recycled concrete. Background technique [0002] Concrete is used the most in construction projects. Among the raw materials of concrete, the amount of aggregate ranks first, and it is the component with the largest volume ratio, accounting for 60-70% of the total volume of concrete materials. For a long time, due to the disorderly mining of natural sand and gravel resources brought about by the application of recycled concrete in urban development and construction, the vegetation on the mountain was destroyed and the river channel was damaged. The use of waste concrete and construction waste as recycled aggregates in recycled concrete can solve the problems of difficult disposal of a large amount of waste concrete and the resulting deterioration of the ecological environment; on the other hand, it can reduce th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/10C04B28/04C04B18/16
CPCC04B20/1085C04B28/04C04B18/08C04B18/141C04B14/06C04B14/02C04B18/16C04B14/42C04B2103/302C04B20/1074C04B20/1051Y02W30/91
Inventor 袁启涛丁路静高建李喆李微蒋新峰王立国孙阳阳
Owner 中建西部建设北方有限公司
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