| 摘要 |
PROBLEM TO BE SOLVED: To obtain a hydraulic mixture capable of improving fluidity and reducing the amount of a water reducing agent added by combining a cement containing a specific amount or more of C3A with a polycarboxylic acid-based water reducing agent and increasing the ignition loss of the cement by a specified amount. SOLUTION: A cement is a cement containing >=4% C3A such as Portland cement, blastfurnace cement, fly ash cement or silica cement. The ignition loss is increased by 0.1-1.1 by an outer percentage. The method for increasing the ignition loss is a water sprinkling treatment or exposure treatment to a high-humidity environment. A polymer of a carboxyl group-containing polymerizable monomer or its anhydride or a polymer of the carboxyl group- containing polymerizable monomer or its anhydride and another polymerizable monomer and having 1,000-100,000 average-molecular weigh may be cited as the water reducing agent. This hydraulic mixture is used in a state of paste, mortar or concrete depending upon a purpose. The formulating ratio of the water reducing agent/the cement is 0.8. |
