slump 10.0-15.0 c.m. ,cement content 520 kg/cu.m., W/C ratio =0.30 and the admixture consumption 1.2% of the binder or equal 6.24 liters. The amount to be paid is 6.24* 17.25 (fixed unit price) =107.25 Baht per cu.m. of this class ,type and grade concrete.