Normal Portland cement Type 1 with specific gravity of 3.17 and Blaine fineness of 315 0 c/g , a n d 5.0–13 .0 mm diameter crushed lime stone (No. 6 according to JIS A 5001 [17] ) with specific gravity of 2.70 and void con tent of 42.6% were used in this experiment. Water reducing agent (WR ) a t a dos age of 0.25% by weigh t o f cement , and type F superplasticizer (SP) with no air en training agent at the dos ages of 0.5% and 1.0% by weight of cement were the admixtures used. The type and the amount of admix turesincludin g the W/C used in this investigation were selected based on previous work [12]