Effect of hybrid fiber and micro-expansion on the physical properties of cementitious composites

摘要

In the present paper, hybrid fibers mixed up with steel fiber (SF) of different sizes, high modulus polyvinyl alcohol fiber (PVAF) and low modulus polypropylene fiber (PPF) are used to reinforce cementitious composites. The properties including resisting shrinkage and permeation of hybrid fiber and micro-expansive agent are investigated, and the reinforcing mechanism is studied by analyzing the pore structure of cement paste incorporating hybrid fiber and expansive agent.