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Composite admixture for foamed concrete and preparation method and application thereof

A composite admixture and foamed concrete technology, applied in the field of building materials, can solve the problems of limited disposal of waste zirconium-silicon slag, low accumulation density of zirconium-silicon slag, and environmental pollution of the surrounding environment, shortening the delivery cycle and demolition time The effect of shortening and improving the viscosity of slurry

Inactive Publication Date: 2015-09-09
济南德澳建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most zirconium-silicon slags are temporarily stored in the open air or landfilled. Due to the low bulk density of zirconium-silicon slag, it becomes flocculent dust after air-drying, which causes serious pollution and damage to the surrounding ecological environment, and direct landfill treatment will also cause groundwater pollution. Pollution
In recent years, although researchers have tried to study the reuse of zirconium-silicon slag, mainly for white carbon black, cement, and extraction and separation of effective components, but generally speaking, either the cost is high, or the utilization is low, and the waste zirconium-silicon slag The actual processing capacity is limited, and the problem of large accumulation of zirconium and silicon slag has not really been solved

Method used

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  • Composite admixture for foamed concrete and preparation method and application thereof
  • Composite admixture for foamed concrete and preparation method and application thereof
  • Composite admixture for foamed concrete and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A composite admixture for foamed concrete prepared from industrial waste residues, the ratio of raw materials used is: 90 parts of zirconium silicon slag, 4 parts of calcium nitrate, 5 parts of calcium stearate and 1 part of polycarboxylate water reducer; zirconium silicon slag It is neutral zirconium silicon slag.

[0034] Preparation method: Take each raw material according to the mass percentage, dry and calcinate the neutral zirconium silicon slag at 105°C for 4 hours, grind it, and sieve it with a 40 micron sieve to obtain a powder rate of at least 90%, and then mix it with calcium nitrate It is ball milled and mixed with calcium hardate and polycarboxylate water reducer to obtain a dry powder composite admixture.

[0035] Application: Add this additive to the foamed concrete at 2% of the dry powder: 400kg of ordinary Portland cement (label P·O42.5), 100kg of ultrafine sand, 15kg of hydrogen peroxide, water-cement ratio 0.39, compound Dosage 10kg.

[0036] Produc...

Embodiment 2

[0038] A composite admixture for foamed concrete prepared from industrial waste residues, the ratio of raw materials used is: 88 parts of zirconium silicon slag, 5 parts of calcium nitrate, 6 parts of calcium stearate and 1 part of polycarboxylate water reducer; zirconium silicon slag It is neutral zirconium silicon slag;

[0039] Preparation method: Take each raw material according to the mass percentage, dry and calcinate the neutral zirconium silicon slag at 250°C for 4 hours and grind it, sieve it with a 40 micron sieve, the powder yield is at least 90%, and then mix it with calcium nitrate and Calcium hardate and polycarboxylate water reducer are ball milled and mixed to obtain a dry powder composite admixture.

[0040] Application: Add this additive to the foamed concrete at 3% of the dry powder: 400kg of ordinary Portland cement (label P·O42.5), 100kg of fly ash, 18kg of hydrogen peroxide, water-cement ratio 0.40, compound Dosage 15kg.

[0041] Product performance ind...

Embodiment 3

[0043] The composite admixture for foamed concrete prepared from industrial waste residues, the ratio of raw materials used is: 85 parts of zirconium silicon slag, 6 parts of calcium nitrate, 7 parts of calcium stearate and 2 parts of polycarboxylate superplasticizer; zirconium silicon slag It is neutral zirconium silicon slag;

[0044] Preparation method: Take each raw material according to the mass percentage, dry and calcinate the neutral zirconium silicon slag at 250°C for 4 hours and grind it, sieve it with a 40 micron sieve, the powder yield is at least 90%, and then mix it with calcium nitrate and Calcium hardate and polycarboxylate water reducer are ball milled and mixed to obtain a dry powder composite admixture.

[0045] Application: add this admixture to the foamed concrete at 5% of the dry powder: ordinary Portland cement (label P·O42.5) 350kg, fly ash 50kg, hydrogen peroxide 18kg, water-cement ratio 0.40, composite Dosage 20kg.

[0046] Product performance index...

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Abstract

The invention discloses a composite admixture for foamed concrete and a preparation method and application thereof. The admixture comprises the following raw materials by weight: 82-90 parts of zirconium-silicate slag, 4-6 parts of calcium nitrate, 3-10 parts of calcium stearate, and 0.5-2 parts of a water reducer. The invention has the following beneficial effects: (1) simple production and application technology; (2) obvious effects of adjusting thickening, foam stabilization and foam solidification; (3) significant coagulation promotion, early strength and shortened production cycle; (4) significantly increased effect, addition of 2%-8% of foamed concrete into the admixture, no autoclave curing or heat curing requirement, strength reaching or exceeding that of the autoclaved aerated concrete masonry block of a same density grade in national standard after maintenance for 7d in natural conditions; and (5) utilization of zirconium silicon slag of 100%, no secondary by-products, waste utilization and environmental protection.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a composite admixture for foamed concrete and its preparation method and application. Background technique [0002] Foamed concrete, also known as foamed cement, is a lightweight cement matrix foaming material formed to reduce the density of cement slurry and inflate it. The foamed concrete in the present invention includes physical foamed concrete and chemically foamed concrete, and mainly refers to foamed concrete used as building insulation material or self-insulation wall material. [0003] Foamed concrete has the following excellent properties: (1) Long life and non-toxic. The biggest advantage of the foamed concrete block is that it has the same lifespan as the building, and its durability can reach more than 50 years. The main raw materials are cement and foaming agent. The foaming agent does not contain harmful chemical substances such as benzene and formal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B38/00
Inventor 徐丽娜井敏岳雪涛田清波
Owner 济南德澳建材有限公司
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