Calcium Chloride Concrete Additive

Calcium chloride is the most effective and least expensive cold weather accelerator for concrete.

Calcium chloride concrete additive.

Sakrete cement mix accelerator is a calcium chloride based product designed to accelerate the set time of concrete mortar or any laporte cement based product. Reduced final set time. In the hydrate form it contains about 25 by weight of water of crystallisation. But many specifications prohibit its use.

Calcium chloride was used as an accelerating admixture in concrete up until the mid 1970s. Aci318 08 building code requirements for structural concrete with some exceptions allows calcium chloride as an accelerating admixture for cast in place concrete. The beneficial effects of calcium chloride will be even more pronounced at lower temperatures. Use this material when a rapid set is desired or when a quick return or access for the area is required.

This is unfortunate because calcium chloride is the most efficient and least expensive accelerator used in concrete. When ready mixed concrete is used calcium chloride should be added at the plant site if the concrete is to be discharged within one hour after the start of mixing. The accelerated cure rate measured as final concrete set time can be reduced by two thirds when two per cent calcium chloride is added two hours compared to six hours for plain concrete morris chemicals s e r t s calcium chloride can accelerate cement hydration reducing its set time. Also used when freezing temperatures are anticipated.