Research on High Ductility Cementitious Composites Improved by Water-Soluble Polymer and Micro-Fibers

The toughness of cement-based materials, related to the performance such as durability and strength, attracts much more attention nowadays. In this paper, the curve of bending load-deflection was adopted to research the influencesof polymers (dispersibility emulsion powder, PVA and styrene butadiene latex) and fibers (PVAF, steel fiber,basalt fiber) on basic mechanical properties and toughness. The results show that the PVAF pre-incorporate in cement motor could improve the toughness of cement motor. In addition, an environmental scanning electron microscopic analysis (ESEM) and hardness were adopted to analyze the microscope morphology of polymer films inside of hardened cementitious composites.