Modified concrete expansive agent

An expansion agent and concrete technology, applied in the field of building material concrete admixtures, can solve problems such as unsatisfactory, and achieve the effects of increasing market value, improving early strength, and having more pores

Active Publication Date: 2017-01-25
GUILIN HUAYUE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although it can obtain a certain strength and the abilit

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  • Modified concrete expansive agent

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Embodiment 1

[0044] A modified concrete expansion agent, made of the following components in proportion by weight: 15 parts of calcium aluminosilicate, 28 parts of calcium sulfoaluminate, 22 parts of sulfur-fixing waste residue, 15 parts of modified red mud, tourmaline powder 2 parts, 7 parts of iron slag, 5 parts of modified calcium oxide, 5 parts of magnesium oxide, 4 parts of sodium methyl silicate, 3 parts of calcium formate, 0.2 parts of azodicarbonamide, 0.5 parts of maltodextrin, lignin sulfonate 2 parts of sodium bicarbonate, 0.4 parts of polyethylene glycol ether, 2 parts of polycarboxylate superplasticizer, 3 parts of modified diatomite powder, and 0.6 part of nano calcium carbonate.

Embodiment 2

[0046] A modified concrete expansion agent, which is made of the following components in proportion by weight: 10 parts of calcium aluminosilicate, 25 parts of calcium sulfoaluminate, 20 parts of sulfur-fixing waste residue, 10 parts of modified red mud, tourmaline powder 1 part, 6 parts of iron slag, 4 parts of modified calcium oxide, 4 parts of magnesium oxide, 3 parts of sodium methyl silicate, 2 parts of calcium formate, 0.1 part of azodicarbonamide, 0.4 part of maltodextrin, lignin sulfonate 1 part of sodium bicarbonate, 0.3 part of polyethylene glycol ether, 1 part of polycarboxylate superplasticizer, 2 parts of modified diatomite powder, and 0.5 part of nanometer calcium carbonate.

Embodiment 3

[0048] A modified concrete expansion agent, made of the following components in proportion by weight: 20 parts of calcium aluminosilicate, 30 parts of calcium sulfoaluminate, 25 parts of sulfur-fixing waste residue, 20 parts of modified red mud, tourmaline powder 5 parts, 8 parts of iron slag, 6 parts of modified calcium oxide, 6 parts of magnesium oxide, 5 parts of sodium methyl silicate, 4 parts of calcium formate, 0.3 parts of azodicarbonamide, 0.7 parts of maltodextrin, lignin sulfonate 4 parts of sodium bicarbonate, 0.6 part of polyethylene glycol ether, 3 parts of polycarboxylate superplasticizer, 5 parts of modified diatomite powder, and 0.8 part of nanometer calcium carbonate.

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Abstract

The invention discloses a modified concrete expansive agent, made from, by weight, 10-20 parts of calcium silicoaluminate, 25-30 parts of calcium sulfoaluminate, 20-25 parts of sulfur fixing waste residue, 10-20 parts of modified red clay, 1-5 parts of tourmaline powder, 6-8 parts of iron slag, 4-6 parts of modified calcium oxide, 4-6 parts of magnesium oxide, 3-5 parts of sodium methyl silicate, 2-4 parts of calcium formate, 0.1-0.3 part of azodicarbonamide, 0.4-0.7 part of maltodextrin, 1-4 parts of sodium lignin sulfonate, 0.3-0.6 part of polyglycol ether, 1-3 parts of a polycarboxylate superplasticizer, 2-5 parts of modified diatomite powder, and 0.5-0.8 part of nano calcium carbonate. The modified concrete expansive agent has the advantages of high strength, good compensating capacity and the ability to control calcium oxide reaction and is a promising concrete admixture.

Description

technical field [0001] The invention relates to a modified concrete expansion agent and belongs to the technical field of concrete admixtures for building materials. Background technique [0002] Concrete is the most widely used building material. With the development of science and technology, it is constantly being studied in depth, and its performance is improved and developed. In recent years, the shrinkage and cracking of concrete has become a research hotspot. This is because in the early stage of cement setting and hardening, water loss and changes in temperature and humidity are likely to cause volume shrinkage, and the tensile stress generated when the shrinkage is limited exceeds the concrete itself. When the tensile strength is high, cement concrete is prone to cracking; at the same time, the bearing capacity of the cracked concrete decreases sharply; moreover, the infiltration of water will further deteriorate the durability of concrete, resulting in corrosion of...

Claims

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Application Information

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IPC IPC(8): C04B24/42
CPCC04B40/0039C04B22/08C04B22/0093C04B18/0427C04B18/0409C04B14/04C04B18/142C04B22/064C04B22/066C04B24/42C04B24/04C04B24/129C04B24/38C04B24/32C04B14/08C04B22/10C04B24/18C04B2103/302
Inventor 黄煌陈威王恒尹丹欧鹏阮长泰谢体云
Owner GUILIN HUAYUE ENVIRONMENTAL PROTECTION TECH CO LTD
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