A low porosity high frost resistance gelling agent and preparation method thereof

Abstract

The invention relates to a low-porosity high-freezing-resistance gelatinizer which comprises the following components in parts by weight: 42-48 parts of superfine slag powder, 24-30 parts of silicon micropowder, 10-15 parts of expanding agent, 4-10 parts of composite water reducer, 2-5 parts of composite retarder, 2-3 parts of short steel fiber, 1-3 parts of ground calcium carbonate, 2-4 parts of microcrystalline cellulose and 1-3 parts of dioctyl sodium sulfosuccinate. The composite water reducer is composed of a polycarboxylic acid water reducer and an aliphatic water reducer in a weight ratio of (1-4):1; and the composite retarder is composed of sodium gluconate and sodium hexametaphosphate in a weight ratio of (1-4):1. The low-porosity high-freezing-resistance gelatinizer has the advantages of lower porosity, small pore size, ultrahigh strength, high durability and favorable volume stability.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a gelling agent with low porosity and high frost resistance and a preparation method thereof. Background technique [0002] With the rapid development of the construction industry, the development of gelling agents is also changing rapidly, and at the same time, higher requirements are put forward for the performance of gelling agents. The addition of gel materials should improve the defects of concrete materials such as low compressive strength, poor ductility, and brittle failure under the action of tensile stress or impact load. It is difficult to meet the comprehensive requirements of concrete materials by using ordinary gelling agents. The gelling agent with high index requirements is prepared to adapt to the rapid development of the construction industry. [0003] At present, concrete gelling agent is mainly aimed at improving a certain performance index of concrete, such...

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Problems solved by technology

The addition of gel materials should improve the defects of concrete materials such as low compressive strength, poor ductility, and brittle failure under the action of tensile stress or impact load. It is difficult to meet the comprehensive requirements of concrete materials by using ordinary gelling agents. Preparation of gelling agent with high index requirements to adapt to the rapid development of construction industry

[0003]At present, concrete gelling agents are mainly aimed at improving a certain performance index of concrete, such as improving the strength of concrete, improving impermeability, frost resistance, and durability Or reduce the cracking of concrete, but cannot improve other properties of concrete at the same time, therefore, gelling agents with high comprehensive properties such as high strength, high durability, impermeability and anti-cracking need further research

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