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Solid waste reclaimed sand as well as preparation method and application thereof

A solid waste and reclaimed sand technology, applied in the field of building materials, can solve the problems of high utilization rate of solid waste, high water absorption rate and high powder content of regenerated sand, and achieve high utilization rate of solid waste and improved comprehensive performance , the effect of low powder content

Active Publication Date: 2021-02-26
GUANGDONG PROVINCIAL ACAD OF BUILDING RES GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prepared compression-resistant recycled mortar has the characteristics of excellent mechanical properties, but it still has the defects of high water absorption rate of recycled sand, high powder content, and the utilization rate of solid waste needs to be improved

Method used

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  • Solid waste reclaimed sand as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment provides a solid waste reclaimed sand, which is composed of the following components by weight ratio: 30 parts of waste concrete, 30 parts of stone powder, 15 parts of cement, 16 parts of fly ash, 0.2 parts of retarder, plasticizer 0.2 parts of water reducing agent, 0.2 parts of water reducing agent, and 40 parts of water. Among them, the cement is P·II 52.5R ordinary Portland cement; the fly ash is F class I fly ash; the retarder is sodium gluconate; the plasticizer is carboxymethyl cellulose; Carboxylic acid superplasticizer.

[0050] Its preparation method is as follows:

[0051] (1) Add solid waste, gelling material, water, retarder, plasticizer and water reducer to the mixer in parts by weight, mix and stir for 10 minutes, and make solid waste slurry;

[0052] (2) Spray-drying the solid waste slurry prepared in step (1) to obtain dry granules with a moisture content of 2.8%;

[0053] (3) Curing the dried granules prepared in step (2) for 28 days ...

Embodiment 2

[0055] This embodiment provides a solid waste reclaimed sand, which is composed of the following components by weight: 80 parts of waste ceramic tiles, 15 parts of cement, 5 parts of slag powder, 8 parts of silica fume, 0.2 parts of retarder, 0.2 parts of plasticizer, 1.2 parts of water reducing agent, 33 parts of water. Among them, the cement is P·O 42.5R ordinary Portland cement; the slag powder is S95 slag powder; the silica fume is silica fume with a 28d activity index of 122%; the retarder is sodium gluconate; the plasticizer is polyvinyl alcohol ; The water reducer is lignosulfonate water reducer.

[0056] Its preparation method is as follows:

[0057] (1) Add solid waste, gelling material, water, retarder, plasticizer and water reducer to the mixer in parts by weight, mix and stir for 30 minutes, and make solid waste slurry;

[0058] (2) Spray-drying the solid waste slurry prepared in step (1) to obtain dry granules with a moisture content of 3.7%;

[0059] (3) Curin...

Embodiment 3

[0061] This embodiment provides a solid waste reclaimed sand, which is composed of the following components by weight: 20 parts of waste mortar, 40 parts of waste concrete, 10 parts of waste tiles, 35 parts of cement, 5 parts of fly ash, metakaolin 8 parts, retarder 0.45 parts, plasticizer 0.38 parts, water reducing agent 1.33 parts, water 38 parts. Among them, the cement is P·II 42.5R ordinary Portland cement; the fly ash is Class I fly ash; the metakaolin is metakaolin with 28d activity index of 108%; the retarder is propylene glycol; the plasticizer is Starch ether; water reducer is polycarboxylate water reducer.

[0062] Its preparation method is as follows:

[0063] (1) Add solid waste, gelling material, water, retarder, plasticizer and water reducer to the mixer in parts by weight, mix and stir for 20 minutes, and make solid waste slurry;

[0064] (2) Spray-drying the solid waste slurry prepared in step (1) to obtain dry granules with a moisture content of 2.2%;

[00...

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Abstract

The invention relates to solid waste reclaimed sand as well as a preparation method and application thereof. The solid waste reclaimed sand is prepared from the following raw materials in parts by weight: solid waste, a cementing material, water, a retarder, a plasticizer and a water reducing agent. The solid waste is creatively mixed with the cementing material, the retarder, the plasticizer, thewater reducing agent and the water, wherein the novel solid waste reclaimed sand is obtained through a series of treatment, and the reclaimed sand has the advantages of being small in water absorption rate, low in powder content, good in fluidity, high in strength and high in solid waste utilization rate; therefore, the defects of traditional solid waste reclaimed sand are overcome, and the comprehensive performance of the reclaimed sand is improved. The preparation method of the solid waste reclaimed sand is simple and easy to operate, and is very suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a solid waste reclaimed sand and its preparation method and application, in particular to a solid waste sand with low water absorption, low powder content, high strength and high utilization rate of solid waste. Bio-reclaimed sand and its preparation method and application. Background technique [0002] In the field of construction, mortar is a kind of building material whose usage is second only to concrete, and the preparation of mortar requires a large amount of traditional river sand, which leads to the increasing shortage of natural resources in our country. Due to the irreversible damage to the environment and resources caused by sand mining, it is imperative to find corresponding alternative materials. On the other hand, with the continuous development of society, a large amount of waste is produced in production and life, which makes the country face huge envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/02C04B18/16C04B18/12
CPCC04B18/021C04B18/16C04B18/12C04B18/08C04B24/06C04B24/383C04B2103/302C04B18/165C04B18/141C04B18/146C04B24/2623C04B24/18C04B14/106C04B24/02C04B24/38Y02W30/91
Inventor 林春王新祥李建新马旭陈培鑫陈耿
Owner GUANGDONG PROVINCIAL ACAD OF BUILDING RES GRP CO LTD
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