Anti-freezing cement

Abstract

The invention relates to the field of an anti-freezing building material, specifically to anti-freezing cement. The anti-freezing cement is composed of the following substances (by weight): 15-20 parts of calcium chloride, 5-10 parts of sodium chloride, 1-5 parts of sodium nitrite, 8-12 parts of sodium chloride, 15-25 parts of gypsum, 5-10 parts of alum, 10-15 parts of calcium metaaluminate, 15-20 parts of sodium sulfocyanate, 25-35 parts of hydrated calcium silicate, 15-22 parts of triethanolamine, 15-20 parts of glass fibre, 25-30 parts of sodium carbonate and 60-70 parts of Portland cement clinker. The anti-freezing cement provided by the invention has a good anti-freezing effect, has good long-term durability, can form many hydrates at low environment temperature within unit time, and reaches anti-freezing critical strength in the shortest possible time so as to reduce the possibility of causing freeze injury to the ground due to sudden drop of temperature.

Description

technical field [0001] The invention relates to the field of antifreeze building materials, in particular to antifreeze cement. Background technique [0002] The construction industry is generally constructed outdoors. In winter, when the outdoor temperature is below zero, the cement will freeze, so construction will not be possible. Usually, in order to prevent the cement concrete mixture from being damaged by freezing at low temperature, people usually adopt antifreeze methods such as adding antifreeze or steam curing, heat preservation, etc., but the latter is not suitable for large-scale application due to complicated construction and low efficiency. [0003] At present, the addition of antifreeze usually uses admixtures, such as early strength agents, antifreeze agents, etc., to prevent the mixture of cement and concrete from freezing at low temperatures. Early strength agents and antifreeze agents can only make cement use at a minimum temperature of minus 10 degrees Ce...

AI Technical Summary

Problems solved by technology

[0002] The construction industry is generally constructed outdoors. In winter, when the outdoor temperature is below zero, the cement will freeze, so construction will not be possible.

Usually, in order to prevent the cement concrete mixture from being damaged by freezing at low temperature, people usually use antifreeze methods such as adding antifreeze or steam curing, heat preservation, etc., but the latter is not suitable for large-scale application due to complicated construction and low efficiency.

[0003] At present, the addition of antifreeze usually uses admixtures, such as early strength agents, antifreeze agents, etc., to prevent the mixture of cement and concrete from freezing at low temperatures. Early strength agents and antifreeze agents can only make cement use at a minimum temperature of minus 10 degrees Celsius. , but these antifreezing agents have the following disadvantages: (1) low drug efficacy and large dosage, the general dosage accounts for 3.5-15% of the cement weight, which brings many inconveniences to transportation and use; (2) the antifreeze degree is not high, The existing cement antifreeze can generally withstand about -10°C, which can only meet the winter construction needs in some areas, and there is still no guarantee for winter construction in some areas