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A kind of sprayed concrete and its construction method

A technology of sprayed concrete and coagulation regulator, which is applied in coatings, polyurea/polyurethane coatings, and building materials, and can solve problems such as poor durability, large cement consumption, and high rebound rate, so as to improve construction performance and reduce The rebound rate and the effect of increasing the adhesion

Active Publication Date: 2021-05-07
淮安市博彦土木工程科学研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of large amount of cement, poor durability and high rebound rate of ordinary shotcrete, and to provide a shotcrete

Method used

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  • A kind of sprayed concrete and its construction method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A shotcrete, consisting of a cementitious material layer and an interface treatment layer, the cementitious material layer is formed by mixing the following components by weight: 600 parts of carbon chromium slag (treated at 1100°C for 1 hour), 200 parts Magnesium oxide, 200 parts of sodium hydrogen phosphate, 50 parts of lithium slag powder, 50 parts of steel slag powder, 10 parts of aluminum powder, 60 parts of water glass, 180 parts of ASA resin emulsion, 50 parts of coagulation regulator (magnesium chloride), 800 parts of recycled aggregate, 200 parts water;

[0026] The interface treatment layer is mixed by the following components by weight: 30 parts of acrylic emulsion, 20 parts of water-based polyurethane, 30 parts of silane coupling agent (γ-glycidyl etheroxypropyltrimethoxysilane), 20 parts of partial Sodium silicate, 30 parts limestone powder, 200 parts water.

[0027] The magnesia is composed of light-burned magnesia and dead-burned magnesia, the mass ratio...

Embodiment 2

[0032] A shotcrete, consisting of a cementitious material layer and an interface treatment layer, the cementitious material layer is formed by mixing the following components by weight: 200 parts of carbon chromium slag (treated at 700°C for 2 hours), 100 parts Magnesium oxide, 100 parts of sodium hydrogen phosphate, 50 parts of lithium slag powder, 50 parts of steel slag powder, 50 parts of aluminum powder, 30 parts of water glass, 50 parts of ASA resin emulsion, 10 parts of coagulation regulator (magnesium nitrate), 400 parts of recycled aggregate , 100 parts of water;

[0033] The interface treatment layer is mixed by the following components by weight: 60 parts of acrylic emulsion, 40 parts of water-based polyurethane, 10 parts of silane coupling agent (γ-glycidyl etheroxypropyltrimethoxysilane), 20 parts of partial Sodium silicate, 30 parts limestone powder, 100 parts water.

[0034]The magnesia is composed of light-burned magnesia and dead-burned magnesia, the mass rati...

Embodiment 3

[0039] A shotcrete, consisting of a cementitious material layer and an interface treatment layer, the cementitious material layer is formed by mixing the following components by weight: 400 parts of carbon chromium slag (treated at 1000°C for 1.5h), 150 Parts of magnesium oxide, 150 parts of sodium hydrogen phosphate, 70 parts of lithium slag powder, 80 parts of steel slag powder, 40 parts of aluminum powder, 50 parts of water glass, 100 parts of ASA resin emulsion, 40 parts of coagulant (magnesium sulfate), 600 parts of regenerated bone Material, 200 parts of water;

[0040] The interface treatment layer is mixed by the following components by weight: 50 parts of acrylic emulsion, 30 parts of water-based polyurethane, 20 parts of silane coupling agent (γ-glycidyl etheroxypropyltrimethoxysilane), 15 parts of partial Sodium silicate, 20 parts limestone powder, 150 parts water.

[0041] The magnesia is composed of light-burned magnesia and dead-burned magnesia, the mass ratio o...

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Abstract

The invention relates to a sprayed concrete, which is composed of a cementitious material layer and an interface treatment layer. The cementitious material layer is formed by mixing the following components in parts by weight: 200-600 parts of carbon chromium slag, 100-200 parts of magnesium oxide , 100-200 parts of sodium hydrogen phosphate, 50-100 parts of lithium slag powder, 50-100 parts of steel slag powder, 10-50 parts of aluminum powder, 30-60 parts of water glass, 50-180 parts of ASA resin emulsion, 10-50 parts Coagulation regulator, 400-800 parts of recycled aggregate, 100-200 parts of water; the interface treatment layer is formed by mixing the following components by weight: 30-60 parts of acrylic emulsion, 20-40 parts of water-based polyurethane, 10-30 parts Silane coupling agent, 5-20 parts of sodium metasilicate, 10-30 parts of limestone powder, 100-200 parts of water. The invention does not use traditional cement and traditional quick-setting agent, is beneficial to environmental protection, and has good durability and low rebound rate.

Description

technical field [0001] The invention belongs to the technical field of shotcrete, and in particular relates to shotcrete and a construction method thereof. Background technique [0002] Shotcrete is a kind of concrete spraying machine that uses compressed air as the power to mix stones, sand, water, admixtures and admixtures according to the pre-designed mixing ratio, and spray them directly onto the surface to be sprayed through hoses or pipes. Quick construction material. Compared with poured concrete, shotcrete has the characteristics of fast final setting time, high early strength, convenient and flexible construction, etc. It is mainly used in construction environments where concrete is difficult to form such as tunnels, mines, underground projects, and slopes. In recent years, as a large number of buildings in our country have entered the aging period, a large number of buildings need to be remodeled, repaired, and reinforced. Shotcrete has been paid more and more att...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/32C09D133/00C09D175/04C09D7/61C09D7/63E04G21/04
CPCC04B28/32C04B2111/00155C04B2201/50C08K2003/265C09D133/00C09D7/61C09D7/63E04G21/04E04G2021/049C04B18/144C04B22/16C04B18/142C04B22/04C04B24/2688C04B12/04C04B22/085C04B22/143C04B18/16C08L75/04C08K13/02C08K3/34C08K5/5435C08K3/26
Inventor 黄昉陈胜李保亮陈星宇陈辉张静卢洪湖费立祥
Owner 淮安市博彦土木工程科学研究院有限公司