低水胶比水泥基复合材料的流变特性

Fluid Characteristics of Cementitious Compositions at Low Waterbinder Ratio

测试了不同胶凝体系低水胶比水泥基复合材料的流变学性能、绘制了流变曲线,分析其适用的流变模型。结果表明,低水胶比水泥基复合材料表现出典型的胀流型流体特性,Bingham模型不能准确表征低水胶比水泥基复合材料的流变特性,采用Herschel-Bulkley模型更为适宜。

Flow curves of cement-based materials with different cementitious compositions at low water-binder ratio are tested by a rheometer, and the suitabihty of some fluid models is analyzed. The results show that cement-based mate- rial at low water-binder ratio has the characteristics of dilatant fluid. Instead of Bingham model, Herschel-Bulkley model is considered the most appropriate one for ar, alyzing the rheological characteristics of cement-based material with low wa- ter-binder ratio.