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Lightweight recycled aggregate pervious concrete and preparation method thereof

A technology of permeable concrete and recycled aggregate, applied in the field of concrete, can solve the problems of low added value, floating ceramsite, low density, etc., and achieve the effect of meeting the requirements of pH, meeting plant growth, and small strength dispersion.

Pending Publication Date: 2021-01-26
SHENZHEN WEIHAI BUILDING MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the production and application of high-performance ceramsite in recent years, ceramsite is more and more used as the aggregate variety of lightweight aggregate concrete, but the density difference from natural sandstone aggregate is large, and ceramsite floats, etc. Insufficient phenomenon, resulting in uneven structure of ceramsite concrete, and poor process effect
[0004] Due to the high porosity and low density of components such as aerated concrete blocks and red bricks in construction waste, it is difficult to be used in ordinary concrete, and the application range is narrow and the added value is low

Method used

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  • Lightweight recycled aggregate pervious concrete and preparation method thereof

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preparation example Construction

[0034] Such as figure 1 Shown, the present invention also provides a kind of preparation method of lightweight recycled aggregate permeable concrete as described above, comprising the following steps:

[0035] S11: Put shale ceramsite, regenerated coarse aggregate and super absorbent resin into water for pretreatment for the first time, and filter out excess water with a screen.

[0036] Specifically, the first duration may be 3 hours. In practical applications, the first duration may also be adjusted as required.

[0037] S12: Put the cement and rice husk ash into the mixer and stir for a second time.

[0038] In this step, the second duration may be 1 minute when the stirring speed of the mixer does not exceed 300 rpm. In practical applications, the second duration may also be adjusted as required.

[0039] S13: Add pretreated shale ceramsite, recycled coarse aggregate, and superabsorbent resin to the mixer, and at the same time add water, additives, and reinforcing agen...

example 1

[0045] Put 150 parts of shale ceramsite, 1300 parts of recycled coarse aggregate, and 10 parts of superabsorbent resin in the following mass ratios into water for pretreatment for 1 hour, and filter out excess water with a sieve; mix the following mass percentages of cement 200 parts and 50 parts of rice husk ash were put into the mixer and stirred for 1 minute (the stirring speed of the mixer was not more than 300 rpm), and then the pretreated shale ceramsite, recycled coarse aggregate, and superabsorbent resin were added to the mixer, and at the same time Add 100 parts of water, 7 parts of admixture, and 8 parts of reinforcing agent to the mixer and continue stirring for 1 minute (the stirring speed of the mixer should not exceed 300 rpm); mix the light recycled aggregate permeable concrete obtained by mixing The compound is poured into the formwork or mold, and is scraped, edged, troweled, and compacted; the lightweight recycled aggregate permeable concrete mixture film that...

example 2

[0047] Put 200 parts of shale ceramsite, 1500 parts of regenerated coarse aggregate and 6 parts of superabsorbent resin in the following mass ratio into water and let it stand for 1 hour for pretreatment, and filter out excess water with a sieve; mix the following mass percentage of cement 300 parts and 80 parts of rice husk ash were put into the mixer and stirred for 1 minute (the stirring speed of the mixer was not more than 300 rpm), and then the pretreated shale ceramsite, recycled coarse aggregate and super absorbent resin were added to the mixer, and at the same time Add 130 parts of water, 15 parts of admixture, and 15 parts of reinforcing agent to the mixer and continue stirring for 1 minute (the stirring speed of the mixer should not exceed 300 rpm); mix the light recycled aggregate permeable concrete obtained by mixing The compound is poured into the formwork or mold, and is scraped, edged, troweled, and compacted; the lightweight recycled aggregate permeable concrete...

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Abstract

The invention provides lightweight recycled aggregate pervious concrete and a preparation method thereof. The lightweight recycled aggregate pervious concrete is prepared from the following raw materials in parts by mass: 30-80 parts of rice hull ash, 200-400 parts of cement, 1100-1500 parts of recycled coarse aggregate, 150-250 parts of shale ceramsite, 0-5 parts of super absorbent resin, 100-150parts of water, 5-15 parts of an additive and 5-15 parts of a reinforcing agent. The rice hull ash, the recycled aggregate and the like are utilized to solve the problem of ceramsite concrete layering caused by low ceramsite density, the pervious concrete with the density smaller than 1600kg / m<3> is prepared, the strength discreteness is low, and meanwhile, the porosity and the water-retaining property of the pervious concrete are increased by utilizing volume shrinkage formed in the water release process of the super absorbent resin.

Description

technical field [0001] The invention relates to the technical field of concrete, and more specifically relates to a lightweight recycled aggregate permeable concrete and a preparation method thereof. Background technique [0002] Traditional river, lake slope protection and road slope protection usually use ordinary concrete, which blocks the connection between the water body and the soil on the shore, and destroys the ecological balance, which is an important reason for the urban "heat island effect". The water permeability and air permeability of pervious concrete can improve the heat and humidity exchange capacity, reduce the surface temperature of concrete materials, and reduce the urban heat island effect. It can effectively collect rainwater or infiltrate and replenish groundwater, promote the relative balance of groundwater resources and ecosystems, and form a relatively stable closed ecosystem. [0003] Lightweight aggregate concrete refers to the dry apparent densit...

Claims

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Application Information

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IPC IPC(8): C04B38/08C04B28/00C04B111/40
CPCC04B28/00C04B2111/00284C04B2111/40C04B18/027C04B18/167C04B18/101C04B2103/0051C04B2103/0068
Inventor 李正茂梁伟俞扬军孙国彬
Owner SHENZHEN WEIHAI BUILDING MATERIAL