Inax Corporation

National House Industrial Co., Ltd.

Ina Seito Co., Ltd.

Tetsuya Koide

Shozo Harada

Satoshi Kitagawa

Shigeo Yoshida

Kazuo Ito

Takayuki Shirai

Manaba Hasegawa

Manabu Hasegawa

A steel reinforced cement product having substantially increased strength made by: positioning prestressed reinforcing steel in a mold cavity; providing a cementitious mixture in the mold cavity about the reinforcing steel in an amount sufficient to fill the mold cavity to a predetermined extent; curing the reinforced cementitious-steel composite article in the mold; drying the article; applying a glaze to the surface of the dried article; burning the glaze; cooling the burned, glazed article, whereby reducing the strength of the composite article; hydrating the reduced strength composite article; and then recurring the thus produced article.

Glazed cement product and method for manufacturing thereof

Method for manufacturing glazed cement products of a foam light-weight aggregate, reinforcing steel under pretension or a stress-absorbing layer around the reinforcing steel. An action of generating crack, caused by a difference of coefficient of thermal expansion between the reinforcing steel and a portion of cement material while burning and cooling are carried out, is absorbed by the foam light-weight aggregate, the stress-absorbing layer or pretension given to the reinforcing steel. A reaction of unreacted cement component is promoted by the hydration to harden for recovering mechanical strength.

Method of manufacturing cement products having superior mechanical

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Nagoya, Japan

Tetsuya Koide