超塑化剂对混凝土流变性能的影响

Effects of Superplasticizers on Workability of Concrete

对混凝土流变学性能的理论基础进行了简要的介绍 ,指出新拌混凝土的流变学性能符合 Bingham模型 ,其流变学参数由屈服应力和塑性粘度来表示 ,通过自行加工的流变仪测定了超塑化剂种类及掺量、水灰比、粉煤灰掺量等因素对混凝土拌和物流变性能的影响 ,同时还对流变学参数的经时变化进行了测定。

The theoretical foundations governing the rheological properties of concrete are outlined in this paper. The rheological properties of fresh concrete are accorded with Bingham properties. The shear resistance of the concrete mix is explained in terms of two constants——yield value and plastic viscosity. An experimental study that measures the effects of superplasticizers, water-to-cement(w/c) ratio, fly ash and elapsed time on the rheological parameters for fresh concrete is also described in the paper.