Environment-friendly concrete anti-freezing agent

Abstract

The invention discloses an environment-friendly concrete anti-freezing agent. The environment-friendly concrete anti-freezing agent comprises, by weight, 10-20 parts of polycarboxylate superplasticizers, 6-10 parts of sodium lignin sulfonate, 8-12 parts of modified phosphogypsum, 5-15 parts of polyglutamic acid, 0.3-0.5 part of sodium sulfosuccinate and 5-10 parts of mannitol. The environment-friendly concrete anti-freezing agent has the advantages that a large quantity of phosphogypsum is utilized, accordingly, the problem of environmental pollution due to the phosphogypsum can be solved, resources further can be saved, the production cost can be reduced, and the environment-friendly concrete anti-freezing agent has excellent economical and social benefits; the environment-friendly concrete anti-freezing agent is good in cement adaptability and stable in quality, the freezing points of concrete mixtures can be obviously lowered, accordingly, concrete can keep free of freezing at the temperatures of -20 DEG C, winter construction requirements can be completely met, and the environment-friendly concrete anti-freezing agent is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of building concrete, in particular to an environment-friendly antifreeze agent for concrete. Background technique [0002] Concrete construction in winter, due to the difference between the concrete temperature and the outside air temperature, heat exchange will occur between the concrete and the ambient temperature. As far as concrete is concerned, the speed of temperature drop determines the size of the hydration temperature. The faster the temperature drops, the slower the increase in concrete strength. When the concrete is frozen prematurely, the strength will not increase again. The higher the water content, the greater the frost heave force after freezing, and the concrete will be easily damaged. The main reason for the decrease in concrete strength is that the volume increases after the water freezes, and the frost heave stress increases accordingly, resulting in cracks. The concrete structure is da...

AI Technical Summary

Problems solved by technology

[0003] In many areas in northern my country, especially in Xinjiang, the temperature in winter is below -5°C, and sometimes it can reach below -30°C. When the temperature is lower than the freezing point of concrete hydration, the hydration process of cement will be greatly affected. impact, and then affect its compressive strength, and the ice swelling force caused by freezing will destroy the internal structure of the concrete, and will also have an adverse effect on the strength and durability of the concrete

The existing antifreeze agents still have unstable quality during the use of concrete, which affects various technical problems such as concrete construction projects.