Accelerants (Lithium Carbonate, Lithium Sulfate, etc.)

An accelerant is an admixture that can make concrete set and harden rapidly. The main types are inorganic salts and organic substances. Typically in the form of a powdery solid, its dosage only accounts for 2% to 3% of the cement in concrete. The accelerant can make the concrete start setting in 5 minutes and complete setting in 12 minutes. Thus, it is often used to achieve emergency repair or rapid condensation of concrete in shafts. It is an indispensable additive in shotcrete construction method. The accelerant's function is to accelerate hydration and hardening of cement and form sufficient strength in a short period of time, in order to meet requirements of special construction.