| 摘要 |
PURPOSE:To secure the high flowability, high chargeability, high aggregate separation resistance and high strength by adding a water-absorbing polymer and specifying its slump flow value to >= a specific value. CONSTITUTION:The water-absorbing polymer absorbing water in a weight of 5-1200 times the weight of the polymer itself includes acrylic acid (e.g. Wondergel), starch/acrylic acid (e.g. Sunwet), maleic acid (e.g. K1 gel), cellulosic (e.g. Aqualon) and synthetic polymer (e.g. Aquareserve GP) polymers. The concrete composition is added in an amount of 0.5-15kg per m<3> of concrete. A high performance water-reducing agent (e.g. a naphthalene sulfonate metal salt-formaldehyde condensation product) is preferably added to the concrete composition in an amount of 0.3-3.0wt.% based on the cement as an effective component. The simultaneous use of other cement additives (e.g. an air-carrying agent), etc., is possible. The concrete composition is characterized in that the slump flow value defined by JIS-A 1101 is >=40cm. |
