Preparation of polycarboxylate based grinding aid and its
· Cement grinding operations for this study were performed in a Type SM 500 laboratory ball mill manufactured by Ruizhi Machine Co Ltd China kg Portland cement clinker kg gypsum and 2 g cement grinding aid wt% of total mass of clinker and gypsum were grinded together to a Blain surface area of about 370 ± 5 m 2 ·kg −1 which