Ishikawa,  Y.,Yasuda Masayuki,Urakawa Kazuya,Yamada Masahiro,Kamada Hiroyasu,Kuroda Yasuhiro,Makino Chikao ' Study on Concrete of High Strength Artiticial Aggregate (Part3 Characteristics of Hardened Concrete).'  MATERIALS AND CONSTRUCTION,SUMMARIES OF TECHNICAL OF ANNUAL MEETING ARCHITECTURAL INSTITUTE OF JAPAN,1999,  pp.5-6