... aluminate, amorphous C12A7, ACA, concrete accelerator, CAS No. 12042-68-1, cement addititve, shotcrete additive, concrete additivesACA are the white-green ... dry shrinkage.It is a special raw material for concrete and cement.It can make the rapid setting time, good ... strength in concrete and cement. It is mainly used in shotcrete, concrete ground hardening and rapid setting etc ...