| 摘要 |
PURPOSE:To secure the high flowability, high chargeability, high aggregate separation resistance and high strength of the concrete composition by adding a high performance water-reducing agent and a specific water-soluble polymer. CONSTITUTION:A naphthalene sulfonate metal salt-formaldehyde condensation product, a melamine sulfonate metal salt-formaldehyde condensation product, etc., are used as the high performance water-reducing agent to be an effective component in an amount of 0.3-3.0wt.% based on a cement. The water-soluble polymer includes acrylic acid, alkylene oxide, amide, cellulosic beta-glucan, starchy, polymers and polyol polymers. The water-soluble polymer has an average particle diameter of 1-300mum and is added to the concrete composition in an amount of 0.01-2.0wt.%. Other cement additives such as an air-carrying agent and a gypsum anhydride strength-enhancing agent can further simultaneously be used. The use of the composition gives a slump flow value of >=40cm. The cement mixed with the cement additive can be cured by a conventional method, and a steam curing method or an autoclave curing method may also be used. |
