... ACA, concrete accelerator, CAS No. 12042-68-1, cement addititve, shotcrete additive, concrete additivesACA are the white- ... fine powder, the ACA powder and OPC (ordinary portland cement) are formulate into Rapid-hardening Mortar and Self ... shrinkage.It is a special raw material for concrete and cement.It can make the rapid setting time, ... % ≤0.51.5 Factory selling Calcium aluminate for water treatment