Waterproof anti-cracking fully-recycled aggregate foamed block based on macro-micro double-pore structure and preparation method thereof

A recycled aggregate and dual-porosity technology, which is applied in the manufacture of tools, ceramic products, and other household appliances, etc., to achieve the effects of light material, improved city appearance, and good shrinkage

Active Publication Date: 2020-02-21
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a kind of building demolition garbage as the main raw material, which has the mechanical properties and dry density of fully recycled aggregate foam block. Waterproof and anti-crack fully recycled aggregate foam blocks with reasonable porosity and pore structure that meet the specification requirements and a production method thereof, so as to realize the resource utilization of construction solid waste and alleviate its pollution to the environment

Method used

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  • Waterproof anti-cracking fully-recycled aggregate foamed block based on macro-micro double-pore structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Take the components according to the mass fraction ratio: polyvinyl alcohol fiber 0%; fully recycled aggregate 50%; polycarboxylate superplasticizer 0%; Portland cement 15%; fly ash 0%; foam 0% agent; 0% air-entraining agent; the rest is water, and the sum of the above components is 100%.

[0039] 2) Mix water, water reducing agent and portland cement evenly and place in a mixer for slow stirring for 1-2 minutes, the speed of the mixer is 140±5r / min, and fully foam for 2-3 minutes; then fully regenerated bone Add the material into the mixer, stir at a slow speed for 2-3 minutes until the mixture is uniform, and obtain the material for the recycled aggregate foam block; finally, add the material for the fully recycled aggregate foam block into the mold of the mortar test piece at one time, and cast it into shape , Prepared into a 40mm*40mm*160mm test piece.

[0040] The fully recycled aggregate foam concrete specimen obtained by the above method shall be placed in a ...

Embodiment 2

[0042] 1) Take the components according to the mass fraction ratio: polyvinyl alcohol fiber 0%; fully recycled aggregate 55%; polycarboxylate superplasticizer 0.2%; Portland cement 18%; fly ash 2%; foam 0% agent; 0% air-entraining agent; the rest is water, and the sum of the above components is 100%.

[0043] 2) Mix water, water reducing agent, portland cement and fly ash evenly and place in a mixer for slow stirring for 1-2 minutes, the speed of the mixer is 140±5r / min, fully foam for 2-3 minutes; Add the fully recycled aggregate into the mixer, stir at a slow speed for 2-3 minutes until the mixture is uniform, and obtain the material for the fully recycled aggregate foam block; finally, add the fully recycled aggregate foam block material into the mortar test piece at a time In the mould, cast and form, and prepare a 40mm*40mm*160mm test piece.

[0044] The fully recycled aggregate foam concrete specimen obtained by the above method shall be placed in a steam curing room af...

Embodiment 3

[0047] 1) Take the components according to the mass fraction ratio: polyvinyl alcohol fiber 0.02%; fully recycled aggregate 55%; polycarboxylate superplasticizer 0.3%; Portland cement 18%; fly ash 3%; foam 0.2% of air-entraining agent; 0.03% of air-entraining agent; the rest is water, and the sum of the above components is 100%.

[0048]2) Mix water, water reducing agent, polyvinyl alcohol fiber, foaming agent, air-entraining agent, Portland cement and fly ash evenly and place in a mixer for slow stirring for 1-2 minutes, the speed of the mixer is 140± 5r / min, fully foaming for 2-3 minutes; then add the whole recycled aggregate into the mixer, stir slowly for 2-3min until the mixture is uniform, and get the whole recycled aggregate foam block material; finally put the whole recycled bone The materials used for the foam block are added to the mold of the mortar specimen at one time, poured into a mold, and prepared into a specimen of 40mm*40mm*160mm.

[0049] The fully recycle...

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Abstract

The invention discloses a waterproof anti-cracking fully-recycled aggregate foamed block based on a macro-micro double-pore structure and a preparation method thereof. The waterproof anti-cracking fully-recycled aggregate foamed block comprises the following components in percentage by mass: 0.01-0.04% of polyvinyl alcohol fibers, 50%-60% of fully-recycled aggregate, 0.1%-0.5% of a water reducingagent, 15%-20% of Portland cement;, 2%-4% of fly ash, 0.1%-0.4% of a foaming agent and 0.01%-0.04% of an air entraining agent, with the balance being water. The preparation method comprises the following steps: uniformly mixing the above components except the recycled aggregate in proportion under stirring, and performing sufficient foaming for 2-3 minutes; adding the graded and adjusted full-recycled aggregate into the formed mixed solution, and carrying out stirring until the materials are uniformly mixed; and pouring the obtained material into a mold, and carrying out maintaining under natural conditions. According to the invention, the full-recycled aggregate is adopted; and based on the foaming characteristic that the foaming agent and the air entraining agent respectively contributeto macropores and micropores and by cooperatively using the crack resistance advantage of the polyvinyl alcohol fibers, the technical performance of fully-recycled foamed mortar is comprehensively improved, so the fully-recycled aggregate foamed block has a low shrinkage value, high crack resistance and high water resistance, and the resource utilization process of building solid wastes is promoted.

Description

technical field [0001] The invention relates to a fully recycled aggregate foam block and a production method thereof, in particular to a waterproof and crack-resistant fully recycled aggregate foam block based on a macro-micro double-pore structure and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, the development of my country's construction industry is changing with each passing day. At the same time, the discharge of construction demolition waste due to house demolition and renovation has increased sharply. Taking Zhejiang Province as an example, the “Three Renovations and One Demolition” campaign (renovation of old residential areas, old factory areas, urban villages and demolition of illegal buildings) started in the province in 2013 is advancing in depth. Only from January to June 2017, Zhejiang The province demolished 129 million square meters of illegal buildings, and completed "three reforms" of 187 m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/02C04B38/10B28B1/50B28B1/52C04B111/40
CPCB28B1/50B28B1/525C04B28/04C04B38/02C04B38/10C04B2111/00017C04B2111/40C04B2201/20C04B2201/50C04B16/0641C04B18/16C04B2103/302C04B18/08C04B2103/304C04B38/0054
Inventor 孟涛赵羽习杨韶勇张存贵谢尚锦黄佳富韦华栋
Owner ZHEJIANG UNIV
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