Carbon dioxide curing prefabricated permeable concrete and preparation method thereof

A technology of permeable concrete and carbon dioxide, applied in the field of building materials preparation, can solve the problems of low production efficiency, slow growth of permeable concrete strength, uneven distribution of voids, etc., to promote the improvement of strength, meet product service requirements, and efficient carbonization process Effect

Active Publication Date: 2021-04-27
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention firstly solves the problems of slow growth of permeable concrete strength, low production efficiency, and uneven distribution of voids. Secondly, the invention solves the problems of industrial tail gas emission, industrial solid waste and Construction waste disposal problem

Method used

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  • Carbon dioxide curing prefabricated permeable concrete and preparation method thereof
  • Carbon dioxide curing prefabricated permeable concrete and preparation method thereof

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preparation example Construction

[0038] The preparation method of the carbon dioxide curing prefabricated permeable concrete comprises the following steps:

[0039] 1) The recycled aggregate absorbs water until saturated surface dry;

[0040] 2) Add the recycled aggregate, nickel slag sand and 40-60% water into the mixer according to the proportion, and stir for 0.5-1 minute;

[0041] 3) Add cement and stir for 1 to 2 minutes;

[0042] 4) Add the remaining water, water reducer, cellulose ether and Wenlun glue, and stir for 1 to 5 minutes;

[0043] 5) Pour the concrete in step 3) into the mold, use a low-frequency plate vibrator to vibrate in layers, and transfer the mold to a closed curing box or curing room;

[0044] 6) Inflate carbon dioxide gas into the airtight curing box or curing room, control the relative humidity of the curing box or curing room to 40-70%, the mass fraction of carbon dioxide to 20-100%, and perform carbon dioxide curing on concrete products for 6-24 hours;

[0045] 7) Demoulding afte...

Embodiment 1

[0047] Prefabricated permeable concrete using carbon dioxide curing is composed of the following components by mass: 60 parts of recycled concrete aggregate, 30 parts of nickel slag sand, 14 parts of ordinary Portland cement, 2 parts of fly ash, 4 parts of steel slag, 1.2 parts of lime, 0.1 It consists of 1 part of nano-calcium carbonate, 6 parts of water, 0.4 part of naphthalene-based water reducer, 0.003 part of cellulose ether, and 0.001 part of Wenlun glue.

[0048] The preparation of carbon dioxide cured prefabricated pervious concrete prepared from nickel slag, steel slag and recycled aggregate includes the following steps:

[0049] Contains the following steps:

[0050] 1) The recycled aggregate absorbs water until saturated surface dry;

[0051] 2) Add the recycled aggregate, nickel slag sand and 40% water into the mixer according to the proportion, and stir for 0.5 minutes;

[0052] 3) Add cement and stir for 1 minute;

[0053] 4) Add the remaining water, water red...

Embodiment 2

[0058] Carbon dioxide cured prefabricated permeable concrete prepared by using nickel slag, steel slag and recycled aggregate consists of the following components by mass: 70 parts of recycled concrete aggregate, 20 parts of nickel slag sand, 24 parts of ordinary Portland cement, and 1.5 parts of fly ash , 4.5 parts of steel slag, 1 part of lime, 0.14 parts of nano-calcium carbonate, 10 parts of water, 0.55 parts of naphthalene-based water reducer, 0.005 parts of cellulose ether, and 0.002 parts of Wenlun glue.

[0059] The preparation of carbon dioxide cured prefabricated pervious concrete prepared from nickel slag, steel slag and recycled aggregate includes the following steps:

[0060] Contains the following steps:

[0061] 1) The recycled aggregate absorbs water until saturated surface dry;

[0062] 2) Add the recycled aggregate, nickel slag sand and 50% water into the mixer according to the proportion, and stir for 1 minute;

[0063] 3) Add cement and stir for 2 minutes...

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Abstract

The present invention is a carbon dioxide curing prefabricated permeable concrete and a preparation method thereof. The permeable concrete consists of the following parts by mass: 55-80 parts of recycled aggregate, 7-30 parts of nickel slag sand, 18-40 parts of cementing material, 5 parts by mass ~25 parts of water, 0.01~2 parts of naphthalene-based water reducer, 0~0.02 parts of cellulose ether, and 0~0.01 parts of Wenlun rubber. The cementing material is composed of the following parts by mass: 70-90 parts of ordinary Portland cement, 5-15 parts of fly ash, 10-30 parts of steel slag, 5-15 parts of lime or lime slag, 0.02-1 part of nano-carbonate calcium composition. The invention has a simple process, fully utilizes the structural advantages of permeable concrete and the material properties of industrial by-products such as nickel slag, steel slag, and fly ash, and uses carbon dioxide curing to realize efficient, fast, and environmentally friendly production, while obtaining high-strength and high-durability permeable concrete products , which not only reduces energy consumption, but also effectively utilizes industrial tail gas, smelting waste residue and construction waste, and has good economic, environmental and social benefits.

Description

technical field [0001] The invention relates to a carbon dioxide curing prefabricated permeable concrete and a preparation method thereof, belonging to the technical field of building material preparation. Background technique [0002] In recent years, my country has vigorously promoted the construction of "sponge city", and permeable concrete pavement is an excellent sponge city technical method to increase rainwater infiltration, which can improve surface runoff conditions very well. [0003] Permeable concrete is a skeleton-void structure, often with single-grained coarse aggregates as the skeleton, often with low strength, and it is prone to problems such as slurry sinking to block the voids during construction and water loss during maintenance to affect strength growth. How to improve strength and reduce clogging is the key issue in the current research on the preparation technology of pervious concrete. [0004] Some scholars in my country have extensively studied the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/04C04B40/02
Inventor 张亚梅王申李保亮潘子云
Owner SOUTHEAST UNIV
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