作者: Tadashi Shimizu , Kunio Matsui
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摘要: The invention relates to a hardened calcium silicate material characterized by having Ib/Ia which is greater than 3 (wherein Ib represents the diffraction peak intensity of tobermorite (220) plane in powdery X-ray diffractometry; and Ia minimum angle region located between two peaks (222) planes;), specific gravity 0.2 or more but less 0.7, being substantially free from bubbles maximum diameter exceeding 200 μm; process for producing same.