利用复合减水技术配制大流动度高强混凝土

Preparation of High Workability and High Strength Concreteby the Compound Water Reducing Technology

简要讨论了可持续发展战略对水泥混凝土材料提出的要求，并利用减水型粉煤灰（简称ＪＦＡ）和高效减水剂对水泥的复合叠加效应，通过正交试验法配制了大流动度高强混凝土．试验结果表明：改变水泥和高效减水剂用量对混凝土早期强度影响显著；ＪＦＡ具有明显的减水作用和活性且有助于提高混凝土后期强度；只有选择好ＪＦＡ和高效减水剂的最佳掺量，才能发挥它们对水泥的最大复合叠加效能．

The demands of the Sustainable Development strategy on cement concrete were discussed in this paper. By means of orthogonal method, high workability and high strength concrete was prepared with the compound effect of JFA and superplasticizer on cement. The experiments resulted that: the cement content and dosage of superplasticizer notably effect the early strength of concrete; using of JFA can largly reduce the water content and the activities of JFA can increase the longterm strength of concrete; the highest compound effect of JFA and the superplasticizer shows only when they are added with the optimum quantity.