Tokuyama Corporation

Hiroshi Nagata

Hiroyoshi Kato

Akinori Nakamura

Takashi Chabayashi

Daihachi Kitayama

A cement clinker which can be sintered at 1,300 to 1,400&#xb0; C. which is lower than the conventional sintering temperature and develops excellent strength characteristics such as mortar compression strength. The cement clinker has a total content of CA and CAF calculated by Bogue's formulas of 22 mass % or more, a CS content calculated by Bogue's formula of 60 mass % or more and an iron modulus (I.M.) of 1.3 or less, preferably 1.0 to 1.3. Since the total content of CA and CAF is 22 mass % or more, the cement clinker can be sintered at a low temperature and the reduction of strength when a cement composition is cured can be prevented by reducing the iron modulus of the cement clinker.

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Shunan, Japan

Hiroshi Nagata