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A two-component switch-type air-entraining agent for wet shotcrete

A technology of wet sprayed concrete and concrete, which is applied in the field of concrete admixture, which can solve the problems of easy slumping of concrete, influence of concrete sprayability, low cohesion of concrete, etc., so as to reduce the probability of clogging accidents and achieve good molding effect , The effect of stable molding quality

Active Publication Date: 2017-11-14
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there is an irreconcilable contradiction between the fluidity of concrete and the slump after spraying of wet shotcrete: higher fluidity makes concrete have lower cohesion, and the concrete sprayed on the sprayed surface tends to collapse fall, which will have a certain impact on the sprayability of concrete

Method used

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  • A two-component switch-type air-entraining agent for wet shotcrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The above-mentioned component A is a mixture of soapberry soap powder, sodium α-olefin sulfonate powder and polyacrylamide powder, in parts by mass: 30-50 parts of sapinberry soap powder, α-olefin sulfonic acid 5-15 parts of sodium, 8-12 parts of polyacrylamide powder;

[0034] The above component B is a mixture of cyclopolydimethylsiloxane and cetyltrimethylammonium chloride powder, in parts by mass: 18-27 parts of cyclopolydimethylsiloxane, ten 5-15 parts of hexaalkyltrimethylammonium chloride powder;

[0035] The above-mentioned component A is added to the concrete slurry during the mixing process according to the mass ratio of 0.05-0.1:100 to the concrete;

[0036] The above component B is carried by compressed air and injected into the concrete slurry at the position of the wind ring of the spray gun connected to the concrete injection pipe according to the mass ratio of 0.015-0.03:100 to the concrete.

[0037] The pressure of the above-mentioned compressed air i...

Embodiment 2

[0048] The two-component switch-type air-entraining agent for wet shotcrete is composed of A component and B component, wherein A component is used for concrete foaming, and B component is used for concrete defoaming;

[0049] The A component is a mixture of Sapindus soap powder, sodium α-olefin sulfonate powder and polyacrylamide powder, in parts by mass: 50 parts of Sapinberry soap powder, sodium α-olefin sulfonate 5 parts, 8 parts of polyacrylamide powder;

[0050] The B component is a mixture of cyclopolydimethylsiloxane and cetyltrimethylammonium chloride powder, in parts by mass: 18 parts of cyclopolydimethylsiloxane, hexadecyl trimethylammonium chloride powder, 15 parts of alkyltrimethylammonium chloride powder;

[0051] The above-mentioned component A is added to the concrete slurry during the mixing process according to the ratio of 0.1:100 to the mass ratio of the concrete;

[0052] The above component B is carried by compressed air and injected into the concrete s...

Embodiment 3

[0056] The two-component switch-type air-entraining agent for wet shotcrete is composed of A component and B component, wherein A component is used for concrete foaming, and B component is used for concrete defoaming;

[0057] The A component is a mixture of Sapinberry soap powder, sodium α-olefin sulfonate powder and polyacrylamide powder, in parts by mass: Sapinberry soap powder 40 parts, sodium α-olefin sulfonate 9 parts, 11 parts of polyacrylamide powder;

[0058] The B component is a mixture of cyclopolydimethylsiloxane and cetyltrimethylammonium chloride powder, in parts by mass: 24 parts of cyclopolydimethylsiloxane, cetyl trimethylammonium chloride powder, 12 parts of alkyltrimethylammonium chloride powder;

[0059] The above-mentioned component A is added to the concrete slurry during the mixing process according to the ratio of 0.08:100 to the mass ratio of the concrete;

[0060] The above component B is carried by compressed air and injected into the concrete slurry...

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Abstract

The invention discloses a two-component switch-type air-entraining agent for wet sprayed concrete, which is composed of A component and B component, wherein, in parts by mass, A component is sapinberry soap powder 30-50 Parts, a mixture of 5-15 parts of sodium α-olefin sulfonate powder and 8-12 parts of polyacrylamide powder; component B is 18-27 parts of cyclopolydimethylsiloxane and hexadecyl A mixture of 5-15 parts of trimethylammonium chloride powder; the above-mentioned component A is added to the concrete slurry during the stirring process in a ratio of 0.05-0.1:100 to the mass ratio of the concrete; the above-mentioned component B is The mass ratio to concrete is 0.015-0.03:100, which is carried by compressed air and injected into the concrete slurry at the air ring position of the spray gun connected to the concrete injection pipe. The invention has both good pumpability and sprayability, low manufacturing cost and low use cost, environmental protection, safe use, and good market promotion value.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a two-component switch-type air-entraining agent for wet sprayed concrete. Background technique [0002] Wet shotcrete has high requirements on the pumpability of fresh concrete. Therefore, it is often necessary to add an air-entraining agent before mixing or during mixing to improve its flow performance and obtain good pumpability. performance. [0003] However, there is an irreconcilable contradiction between the fluidity of concrete and the slump after spraying of wet shotcrete: higher fluidity makes concrete have lower cohesion, and the concrete sprayed on the sprayed surface tends to collapse Falling will have a certain impact on the sprayability of concrete. [0004] How to endow concrete with fluidity and sprayable performance indicators at the same time has become the research and development direction of air-entraining agents, and is an important issue to be solved urgently by t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C04B103/30
CPCC04B40/0039C04B2103/304C04B2111/00146C04B24/04C04B24/163C04B24/2652C04B24/42C04B24/12
Inventor 程卫民刘国明崔向飞肖伟黄亚楠潘刚于欣郇昌利李振陈连军
Owner SHANDONG UNIV OF SCI & TECH