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Special anti-sloughing liquid coagulant for foam concrete cast-in-place wall

A foamed concrete and cast-in-place wall technology, which is applied in the field of concrete additives, can solve the problems of foamed concrete collapse, restricting the wide application of foamed concrete, and low foam breaking rate of slurry setting and hardening rate.

Inactive Publication Date: 2021-07-27
SHANDONG JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the application of foam concrete in China has developed rapidly, but there are still a series of problems, such as the collapse of foam concrete due to the influence of pouring height, which seriously restricts the wide application of foam concrete
The main reason for the collapse of the mold is that the initial setting time of the foamed concrete is too long, which causes the setting and hardening rate of the slurry to be lower than the foaming rate of the foamed concrete

Method used

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  • Special anti-sloughing liquid coagulant for foam concrete cast-in-place wall
  • Special anti-sloughing liquid coagulant for foam concrete cast-in-place wall

Examples

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Effect test

Embodiment 1

[0030] An anti-collapse liquid coagulant for foam concrete cast-in-place walls, which consists of the following components in parts by weight:

[0031] 50 parts of polyaluminum sulfate, 5 parts of magnesium sulfate, 1 part of triethanolamine, 2 parts of magnesium fluorosilicate, 0.2 parts of amide-modified polycarboxylate superplasticizer, 4 parts of mixed acid composed of lactic acid and phosphoric acid in a weight ratio of 1:10 , 0.5 parts of sodium bicarbonate, 0.5 parts of hydroxypropyl methylcellulose, 0.1 parts of carboxymethyl starch ether, 2 parts of sodium tripolyphosphate, and 400 parts of water.

[0032] The preparation method of amide modified polycarboxylate water reducer is as follows:

[0033] The aqueous solution of prenol polyoxyethylene ether with a mass concentration of 10% is heated to 80°C, the hydroxyl value of prenol polyoxyethylene ether is 21-26mgKOH / g, the acid value is ≤0.5mgKOH / g, and the molecular weight is 2200-2600, add the mixed solution of cro...

Embodiment 2

[0037] An anti-collapse liquid coagulant for foam concrete cast-in-place walls, which consists of the following components in parts by weight:

[0038] 40 parts of polyaluminum sulfate, 5 parts of magnesium sulfate, 1 part of triethanolamine, 2 parts of magnesium fluorosilicate, 0.1 part of amide-modified polycarboxylate superplasticizer, 2 parts of mixed acid composed of lactic acid and phosphoric acid in a weight ratio of 1:20, 0.1 part of sodium bicarbonate, 0.1 part of hydroxypropyl methylcellulose, 0.1 part of carboxymethyl starch ether, 3 parts of sodium tripolyphosphate, and 500 parts of water.

[0039] The preparation method of amide modified polycarboxylate water reducer is as follows:

[0040] The aqueous solution of prenol polyoxyethylene ether with a mass concentration of 5% is heated to 85°C, the hydroxyl value of prenol polyoxyethylene ether is 21-26mgKOH / g, the acid value is ≤0.5mgKOH / g, and the molecular weight is 2200-2600, add the mixed solution of crotonic ...

Embodiment 3

[0044] An anti-collapse liquid coagulant for foam concrete cast-in-place walls, which consists of the following components in parts by weight:

[0045]30 parts of polyaluminum sulfate, 5 parts of magnesium sulfate, 0.1 part of triethanolamine, 1 part of magnesium fluorosilicate, 0.1 part of amide-modified polycarboxylate superplasticizer, 1 part of mixed acid composed of lactic acid and phosphoric acid in a weight ratio of 1:6, 0.1 part of sodium bicarbonate, 0.1 part of hydroxypropyl methylcellulose, 0.1 part of carboxymethyl starch ether, 1 part of sodium tripolyphosphate, 400 parts of water.

[0046] The preparation method of amide modified polycarboxylate water reducer is as follows:

[0047] The aqueous solution of prenol polyoxyethylene ether with a mass concentration of 5% is heated to 70°C, the hydroxyl value of prenol polyoxyethylene ether is 21-26mgKOH / g, the acid value is ≤0.5mgKOH / g, and the molecular weight is 2200-2600, add the mixed solution of crotonic acid, N...

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Abstract

The invention relates to the field of concrete auxiliary agents, in particular to a special anti-sloughing liquid coagulant for foam concrete cast-in-place wall. The special anti-sloughing liquid coagulant is prepared from the following components in parts by weight: 30-55 parts of polyaluminum sulfate, 5-10 parts of magnesium sulfate, 0.1-5 parts of tertiary amine, 1-5 parts of magnesium fluosilicate, 0.1-0.5 part of an amide modified polycarboxylate superplasticizer, 1-4 parts of mixed acid, 0.1-0.5 part of sodium bicarbonate, 0.1-0.5 part of hydroxypropyl methyl cellulose, 0.1-0.5 part of carboxymethyl starch ether, 1-3 parts of sodium tripolyphosphate and 400-500 parts of water. The early setting agent can shorten the initial setting time and the final setting time of the foam concrete, prevents a foam concrete wall from collapsing, avoids the bleeding phenomenon, and improves the mechanical property of the foam concrete to a certain extent.

Description

technical field [0001] The invention relates to the field of concrete additives, in particular to a special anti-collapse liquid coagulant for foam concrete cast-in-place walls. Background technique [0002] As people pay more attention to environmental protection, new wall materials with environmental protection, energy saving, safety, low carbon and sustainable development have become the first choice. Among many materials, foamed concrete has become the most cost-effective material. In recent years, the application of foam concrete in China has developed rapidly, but there are still a series of problems, such as the collapse of foam concrete due to the influence of pouring height, which seriously restricts the wide application of foam concrete. The main reason for the collapse of the mold is that the initial setting time of the foamed concrete is too long, which causes the setting and hardening rate of the slurry to be lower than the foaming rate of the foamed concrete. ...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B103/10
CPCC04B40/0039C04B2103/10
Inventor 赵连地陈仁山张则民张伟何景雪尹艳伟
Owner SHANDONG JIAOTONG UNIV
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