Other

Taisei Corporation

Denki Kagaku Kogyo Kabushiki Kaisha

Tazawa, Eiichi

Eiichi Tazawa

Yasuro Ito

Yasuhiro Yamamoto

Yoshiro Higuchi

Hideharu Kaga

Masanori Tsuji

Mitsutaka Hayakawa

Kenji Kuroha

Yasunori Matsuoka

Seiji Kaneko

Akihiro Hori

Norio Marushima

Akihiro Denki Kagaku Kogyo Kabushiki Kaisha Hori

Method of manufacturing high strength chemically prestressed concrete molding products with great amount of introduced chemical prestress and smaller loss of the same, a high temperature high pressure underwater curing apparatus concrete molding products excellent in energy efficiency, productivity and safety by re-utilizing curing water, as well as a curing method thereof are provided.

Method for producing chemically prestressed concrete product, high-temperature, high-pressure underwater concrete product curing device suitably used for the method and curing method for concrete product using the curing device

In the preparation of a cement paste about 30 to 76% of the total water is added to the cement to form a funicular state, capillary state or slurry state, and the resulting mixture is kneaded so as to reduce the coagulated lumps of cement. Then the remaining quantity of water is added and the composition or mixture is kneaded again. Sand and/or gravel may be incorporated after the firstly kneaded mixture. The resulting cement paste, mortar or green concrete exhibits a small percentage of bleeding water and products prepared therefrom have a high compression strength.

Method of preparing kneaded compositions

Growing community of inventors

Tokyo, Japan

Eiichi Tazawa