发明名称 CEMENT COMPOSITION, CONCRETE, AND METHOD FOR PRODUCING THE CEMENT COMPOSITION
摘要 PROBLEM TO BE SOLVED: To provide a cement composition which exhibits excellent flowability stably immediately after kneading and also causes little change with time in flowability without depending on the brand (kind) of dispersants, in concrete having a low water/cement ratio and using a polycarboxylic acid-based dispersant. SOLUTION: The cement composition contains cement clinker and gypsum. In the cement composition, the content of hemihydrate gypsum is 0.2-3.5 mass%, the ratio of the amount of the hemihydrate gypsum to the total amount of the hemihydrate gypsum and dihydrate gypsum is 50-95 mass%, and the content of water-soluble alkali is 0.17-0.32 mass%. The particles obtained by pulverizing the cement composition have a stuck water amount of 0.003-1.0 mass% based on the cement composition. COPYRIGHT: (C)2007,JPO&INPIT
申请公布号 JP2007045647(A) 申请公布日期 2007.02.22
申请号 JP20050229793 申请日期 2005.08.08
申请人 UBE IND LTD 发明人 ITO TAKAYASU;YUGE SACHIO
分类号 C04B7/02;C04B24/26;C04B28/02 主分类号 C04B7/02
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