First, alkaline water reducer: can improve the fluidity and strength of concrete.It can save concrete usage,and improve the durability of concrete.Excessive incorporation will lead to lower strength,and water tightness.
Second, retarders: can reduce the hydration rate and hydration heat of concrete,and extend the curing time of concrete.It is mainly used for construction in hot seasons,large volume concrete pumping and slip-form construction.It is also used for commercial concrete transported long distances.It is not suitable for concrete construction in temperatures below five degrees.
Third, air entrainment agents: can introduce a large number of tiny bubbles,can improve the homogeneity of concrete,reduce water segregation,improve the impermeability, frost resistance and crack resistance.It will reduce the compressive strength of concrete.Air entrainment agents are suitable for frost resistanceconcrete in waterproof and impermeable rock.
Fourth, expansion agent: can cause concrete to expand slightly during hardening.It is often used in basements and waterproofing of dense structures,and impermeability performance concrete.and concrete for post-tensioning compensation shrinkage.Antifreeze agent Antifreeze agents can harden concrete at negative temperatures,and under specified curing conditions,and achieve the expected performance and sufficient frost resistance.Antifreeze agent is a substance that can prevent the freezing of water in materials.
That’s all,the functions and uses of various concrete admixtures.
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