1) chloride salt antifreeze can be used in concrete projects and reinforced concrete projects. it is strictly prohibited to be used in prestressed concrete projects and should comply with the provisions of gbj119 "technical specifications for the application of concrete admixtures" ; chloride salt rust-inhibiting antifreeze can be used in concrete and reinforced concrete projects. it is strictly prohibited to be used in prestressed concrete projects and should comply with the provisions of gbj119 "technical specifications for the application of concrete admixtures"; nitrite, nitrate and other inorganic salts are antifreeze the agent is strictly prohibited to be used in prestressed concrete and concrete structures in contact with galvanized steel.
2) organic compound antifreeze can be used in concrete engineering, reinforced concrete engineering and prestressed concrete engineering.
3) organic compound and inorganic salt composite antifreeze and composite antifreeze can be used in concrete engineering, reinforced concrete engineering and prestressed concrete engineering.
antifreeze containing harmful ingredients such as hexavalent chromium salts and nitrites is strictly prohibited from being used in drinking water projects and parts in contact with food, and is strictly prohibited from consumption.
antifreezes containing ammonium nitrate, urea and other antifreeze that produce pungent odors must not be used in office, residential and other construction projects.
4) for hydraulic engineering, bridges and concrete projects with special freeze-thaw resistance requirements, the type and dosage of antifreeze should be determined through tests.
