Construction waste recycled concrete

A technology for recycled concrete and construction waste, applied in the field of concrete, can solve the problems affecting the impermeability of recycled concrete, low bulk density of recycled fine aggregate, rough surface of recycled coarse aggregate, etc., so as to speed up hydration and prolong hydration. time, the effect of improving the compactness

Active Publication Date: 2019-11-01
BEIJING GAOQIANG CONCRETE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned existing technical solutions have the following defects: the surface of the recycled coarse aggregate obtained from waste bricks is relatively rough, with micro-cracks, there

Method used

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  • Construction waste recycled concrete

Examples

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Effect test

Embodiment 1

[0039] A construction waste regenerated concrete. The preparation raw materials include 65 parts of fly ash, 25 parts of stone powder, 350 parts of recycled coarse aggregate, 320 parts of recycled fine aggregate, 28 parts of early strength agent, polycarboxylate 0.5 part of water agent, 3 parts of fatty alcohol sulfonate, 2 parts of reinforcing component, 0.2 part of sodium gluconate; among them, the regenerated coarse aggregate is obtained by crushing and screening waste bricks, and the regenerated fine aggregate is obtained by crushing waste concrete Screened; the early strength agent is a mixture of sodium sulfate and triethanolamine 1:1.5; the reinforcing component is basalt fiber, polypropylene mesh fiber, metakaolin, and CABR-MS605 rust inhibitor 1:1.1:1.2:0.2 mixture.

Embodiment 2

[0041] A construction waste regenerated concrete, prepared according to parts by weight, the preparation raw materials include 74 parts of fly ash, 28 parts of stone powder, 375 parts of recycled coarse aggregate, 345 parts of recycled fine aggregate, 32 parts of early strength agent, polycarboxylic acid reducing 0.9 parts of water agent, 4 parts of fatty alcohol sulfonate, 5 parts of reinforcing components, and 0.5 parts of sodium gluconate; among them, the recycled coarse aggregate is obtained by crushing and screening waste bricks, and the recycled fine aggregate is obtained by crushing waste concrete Screened; the early strength agent is a mixture of sodium sulfate and triethanolamine 1:1.6; the reinforcing component is basalt fiber, polypropylene mesh fiber, metakaolin, and CABR-MS605 rust inhibitor 1:1.5:1.5:0.6 mixture.

Embodiment 3

[0043] A construction waste regenerated concrete, prepared according to parts by weight, the preparation raw materials include 85 parts of fly ash, 34 parts of stone powder, 390 parts of recycled coarse aggregate, 370 parts of recycled fine aggregate, 40 parts of early strength agent, polycarboxylic acid reducing 1.3 parts of water agent, 5 parts of fatty alcohol sulfonate, 7 parts of reinforcing components, and 0.8 parts of sodium gluconate; among them, the recycled coarse aggregate is obtained by crushing and screening waste bricks, and the recycled fine aggregate is obtained by crushing waste concrete Screened; the early strength agent is a mixture of sodium sulfate and triethanolamine 1:1.8; the reinforcing component is basalt fiber, polypropylene mesh fiber, metakaolin, and CABR-MS605 rust inhibitor 1:1.9:1.7:0.9 mixture.

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Abstract

The invention relates to construction waste recycled concrete, and belongs to the technical field of concrete. The construction waste recycled concrete comprises fly ash, stone powder, recycled coarseaggregate, recycled fine aggregate, an early strength agent, a water reducing agent, an air entraining agent and a reinforcing component, wherein the recycled coarse aggregate is formed by crushing and screening waste bricks; the recycled fine aggregate is formed by crushing and screening waste concrete; and the reinforcing component comprises basalt fibers, polypropylene reticular fibers, metakaolin and a CABR-MS605 corrosion inhibitor. According to the technical scheme, the impermeability of the recycled concrete can be improved.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to recycled concrete from construction waste. Background technique [0002] With the improvement of people's awareness of environmental protection, in recent years, more and more enterprises have begun to use construction waste as raw materials to prepare recycled concrete. [0003] There are a large number of waste clay bricks and waste concrete in the construction waste generated by the demolition of old buildings, so strengthening the recycling of waste clay bricks and waste concrete for the preparation of recycled concrete or the production of concrete products is the best way to realize the recycling of construction waste One of the effective ways, and more important practical significance. Usually waste bricks and waste concrete are mechanically crushed, graded and screened to obtain recycled aggregates to replace natural sand and gravel, reduce the amount of natural sand an...

Claims

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Application Information

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IPC IPC(8): C04B28/18
CPCC04B28/18C04B18/08C04B18/12C04B18/16C04B22/147C04B24/122C04B2103/30C04B24/16C04B24/10C04B14/4643C04B16/0633C04B14/106C04B2103/61
Inventor 文俊强李彦昌杨荣俊庞永龙张硕
Owner BEIJING GAOQIANG CONCRETE
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