流变学理论在水泥基材料中的应用

Application of Rheological Theory in Cement-based Materials

将流变学理论运用于水泥基材料工作性能的研究,即为水泥基材料的流变性能研究。Bingham模型作为水泥基材料最核心的流变模型,具有简单实用、吻合度好的特点,至今仍在不断发展的混凝土流变学研究中起到中流砥柱的作用。两个流变参数——屈服应力和塑性粘度都是水泥基材料内部结构阻碍其自身变形的反映。流变学理论在水泥基材料中的发展,使得混凝土各组分对其工作性能和泵送性能的研究得以定量展开。

As a branch of basic science, rheology aims at flow and deformation of objects, and focus on the study of the relationship between force, deformation and time. Rheology theory has been applied in the study of the workability of cement - based materials, which is the study of the rheological properties of cement - based materials. Bingham model as a core rheologieal model of cement - based materials, has such good features of simple, practical, and consistent, that still plays a pivotal role in the continuing development of concrete rheology. Two rheologieal parameters - yield stress and plastic viscosity are reflections of hinder deformation by the internal structure of cement - based materials. The quantity of mod- em concrete rheological models is growing, each of which has its particular usage and application environment. The development of rheological the- ory in cement - based materials, leads to the quantitative research of concrete compositions and their effects on the workability and pumping per- formance of concrete.