Denki Kagaku Kogyo Kabushiki Kaisha

Haneda Humepipe Co., Ltd.

Masaru Murase

Takashi Shimamura

Hirotoshi Hagiwara

Yoshiharu Watanabe

Hiroyoshi Serizawa

Tetsuo Shibata

A process for producing a concrete product, which includes a step of preparing a primary concrete by mixing a super dry consistency concrete having a unit amount of water of at most 100 kg/cm.sup.3, a step of preparing a secondary concrete by weighing a suitable amount of the primary concrete and adding at least water, a water reducing agent and a setting accelerator thereto, followed by remixing, and a step of molding the secondary concrete in a formwork.

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Tokyo, Japan

Masaru Murase