Adding antifreeze in winter concrete construction has the advantages of simple construction, energy saving, saving concrete construction costs, and improving the quality of winter concrete construction.
A good antifreeze agent can help concrete reach its critical strength for freezing as soon as possible, ensuring that the liquid phase in the concrete does not freeze or freezes less at negative temperatures; It can hydrate cement and increase the strength of concrete normally after curing at negative to positive temperatures.
The development of antifreeze has gone through several stages in terms of composition, including chloride salt type, chloride salt rust inhibitor type, chlorine free high alkali type, and chlorine free low alkali type.
Among them, chloride salt antifreeze is not allowed to be used in reinforced concrete and prestressed concrete structures.
Antifreeze products generally contain water reducing components, early strength components, antifreeze components, and air entraining components.
The principle is to reduce the water consumption of concrete, improve the early strength of concrete as soon as possible, and prevent concrete freezing damage under negative temperature.
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