Recycled concrete and preparation method thereof

A technology of recycled concrete and recycled aggregate, which is applied in the field of building materials, can solve the problems that the performance improvement effect of recycled concrete needs to be further improved, the interface effect and compatibility are not good, etc., and is beneficial to environmental protection, social benefits and ecological benefits. High, powerful effect

Inactive Publication Date: 2020-11-17
曹均云
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the synthetic fibers added therein are one or more of polypropylene fibers, polyacrylonitrile fibers or polyester fibers; these fiber structures are hydrophobic structures, and the interfacial interaction and compatibility between them and other components of concrete The performance of traditional recycled concrete is not good, so the effect of improving the performance of traditional recycled concrete needs to be further improved

Method used

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  • Recycled concrete and preparation method thereof
  • Recycled concrete and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] A recycled concrete is characterized in that it is made of the following raw materials in parts by weight: 150 parts of cement, 250 parts of modified recycled aggregate, 400 parts of fine river sand, 5 parts of attapulgite, porous β-cyclopaste 1 part of fine cross-linked polymer nanofiber, 50 parts of blast furnace slag, 1 part of mullite fiber, 2 parts of diazolidinyl urea, 4 parts of terminal sulfonate type hyperbranched water-based polyurethane emulsion, 2 parts of admixture, 75 parts of water share.

[0033] The raw materials for preparing the recycled concrete also include: 2 parts of carboxyl-terminated liquid fluororubber and 1 part of water-soluble hyperbranched epoxy resin.

[0034] The cement is Portland cement with a label of 52.5; the admixture is LEX-9P admixture.

[0035] The preparation method of the modified recycled aggregate comprises the following steps: stirring and breaking up the recycled aggregate obtained after sorting, cleaning, crushing and si...

Embodiment 2

[0039] A recycled concrete is characterized in that it is made of the following raw materials in parts by weight: 160 parts of cement, 260 parts of modified recycled aggregate, 410 parts of fine river sand, 6 parts of attapulgite, porous β-cyclopaste 1.5 parts of fine cross-linked polymer nanofiber, 55 parts of blast furnace slag, 1.5 parts of mullite fiber, 3 parts of diazolidinyl urea, 5 parts of terminal sulfonate type hyperbranched water-based polyurethane emulsion, 2.5 parts of admixture, 80 parts of water share.

[0040] The raw materials for preparing the recycled concrete also include: 2.5 parts of carboxyl-terminated liquid fluororubber and 1.5 parts of water-soluble hyperbranched epoxy resin.

[0041] The cement is Portland cement with a label of 52.5R; the admixture is LEX-9P admixture.

[0042] The preparation method of the modified recycled aggregate comprises the following steps: stirring and breaking up the recycled aggregate obtained after sequentially sorting...

Embodiment 3

[0046] A recycled concrete is characterized in that it is made of the following raw materials in parts by weight: 165 parts of cement, 280 parts of modified recycled aggregate, 430 parts of fine river sand, 7.5 parts of attapulgite, porous β-cyclopaste 2 parts of fine cross-linked polymer nanofibers, 57 parts of blast furnace slag, 2 parts of mullite fiber, 3.5 parts of diazolidinyl urea, 6 parts of terminal sulfonate type hyperbranched water-based polyurethane emulsion, 3 parts of admixture, 83 parts of water share.

[0047] The raw materials for preparing the recycled concrete also include: 3 parts of carboxyl-terminated liquid fluororubber and 2 parts of water-soluble hyperbranched epoxy resin.

[0048] The cement is Portland cement with a label of 62.5; the admixture is LEX-9P admixture.

[0049] The preparation method of the modified recycled aggregate comprises the following steps: stirring and breaking up the recycled aggregate obtained after sequentially sorting, clea...

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Abstract

The invention discloses recycled concrete, which is characterized by being prepared from the following raw materials in parts by weight: 150-180 parts of cement, 250-300 parts of modified recycled aggregate, 400-450 parts of fine river sand, 5-10 parts of attapulgite, 1-3 parts of porous beta-cyclodextrin cross-linked polymer nanofibers, 50-65 parts of blast furnace slag, 1-3 parts of mullite fibers, 2-5 parts of diazoalkyl urea, 4-8 parts of sulfonate-terminated hyperbranched waterborne polyurethane emulsion, 2-4 parts of additives and 75-90 parts of water. The recycled concrete is prepared from the following raw materials in parts by weight: 2-4 parts of carboxyl-terminated liquid fluororubber and 1-3 parts of water-soluble hyperbranched epoxy resin. The invention also discloses a preparation method of the recycled concrete. The recycled concrete disclosed by the invention is excellent in comprehensive performance, high in strength, low in water absorption rate, good in durability and workability and good in workability.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to recycled concrete and a preparation method thereof. Background technique [0002] With the development of my country's modernization and the advancement of urban-rural integration, large-scale new city construction and old city renovation have led to an increasing number of construction wastes, which usually include bricks and tiles, waste stones, concrete blocks, sand, etc. If the dust is not treated immediately, it will not only take up a lot of land resources, cause a lot of waste of resources, but also pollute the water environment and air around the construction waste dumping area. How to rationally recycle these construction wastes and turn them into treasures is an urgent problem to be solved by researchers in the industry. [0003] Recycled concrete is the aggregate obtained by crushing, cleaning, grading and coordinating waste concrete in a certain proportion,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/16
CPCC04B18/16C04B28/04C04B2201/50C04B14/068C04B14/102C04B16/0675C04B18/141C04B14/4643C04B24/129C04B24/166C04B2103/0068Y02W30/91
Inventor 曹均云
Owner 曹均云
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