Polycarboxylic acids anti-freeze agent for cement concrete and method for preparing same

Abstract

The invention relates to poly carboxylic acid system antifreeze applied to cement concrete and a preparation method thereof and belongs to the building material field. The antifreeze is prepared by the optimal combination of an efficient water reduce of poly carboxylic acid, organic alcohol amine, low-carbon alcohol, sulfocyanide and formate. The preferred proportion of the components is that the efficient water reducer to the organic alcohol amine to the low-carbon alcohol to the sulfocyanide to the calcium formate to water is equal to (3.0-8.0) to (0.5-2.0) to (0.0-2.0) to (10.0-20.0) to (0.0-6.0) to (65.0-75.0) (by mass percentage). Compared with the existing antifreeze, the antifreeze of the system has the advantages of high water reducing rate and comparatively good workability and quick growth of strength at negative temperature. The antifreeze has the advantages of low intermingled quantity in the cement concrete, good water solubility, low alkali content, high strength at the early stage and at the later stage of the cement concrete but no chlorine and is applicable to the preparation of various cement concrete at the negative temperature ranging from negative 5 DEG C to negative 20 DEG C in winter in the north area.

Description

technical field

[0001] The present invention relates to a polycarboxylate antifreeze agent for cement concrete. Compared with traditional antifreeze agents, it has significant advantages such as low alkali and no chlorine, excellent performance and environmental protection. It is composed of polycarboxylate high-efficiency water reducer and The mixture of organic and inorganic salts belongs to the technical field of building materials. Background technique

[0002] The winter concrete construction temperature in the vast northern regions of our country is mostly below 0°C, and the lowest winter temperature in the northeast and northwest regions sometimes reaches minus 20-30°C. If the temperature drops below the freezing point of concrete hydration water, the hydration water will freeze and affect the concrete hydration process. The strength development will not meet the age requirements, and the ice expansion stress will cause the internal structure of the concrete to be dam...

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