*Seishi Shiraiwa¹, Takayoshi Funao² (1. Hazama Ando Corporation, 2. OSAKA HYOGO CONCRETE INDUSTRIAL ASSOCIATION)

*Takayoshi Funao¹, Shuuichi Ikoma², Minehito Suzuki³, Seishi Siraiwa⁴ (1. Osaka-Hyogo Ready-Mixed Concrete Industrial Association, 2. Osaka Kouiki Ready-mixed Concrete Cooperative Association, 3. Okamoto Concrete Corporation, 4. HAZAMA ANDO CORPORATION)

*Minehito Suzuki¹, Shuichi Ikoma², Takayoshi Funao³, Seishi Shiraiwa⁴ (1. Okamoto Concrete Corporation, 2. Osaka Kouiki Ready-mixed Concrete Cooperative Association, 3. Osaka-Hyogo Ready-Mixed Concrete Industrial Association, 4. HAZAMA ANDO CORPORATION)

*Shuichi Ikoma¹, Takayoshi Funao², Minehito Suzuki³, Seishi Shiraiwa⁴ (1. Osaka Kouiki Ready-mixed Concrete Cooperative Association, 2. Osaka Ready-Mixed Concrete Industrial Association, 3. Okamoto Concrete Corporation, 4. HAZAMA ANDO CORPORATION)

*Naoto Kondo¹, Yasuhiro Dosho¹, Kenji Nishikigi², Kenichi Moriya² (1. Meijo University, 2. Toda Corporation)

*Kennji Nishikigi¹, Kenichi Moriya¹, Tooru Tanaka¹, Yasuhiro Dosho², Naoto Kondo² (1. Toda Corporation, 2. Meijo University)