In order to explore the influence of high temperature steam curing on the mechanical properties of ultra-high performance concrete,the compressive,flexural and direct tensile strength of UHPC under high temperature steam curing and standard curing were compared and studied.The stress-strain curves of UHPC under compression,bending and pulling were tested,and SEM scanning was carried out.The results show that high temperature steam curing can improve the early strength of UHPC,but its later strength is difficult to improve or even shrink.The flexural strength,tensile strength and ductility of UHPC will be reduced un-der high temperature steam curing.Scanning electron microscopy showed that there was a small gap between the steel fiber and the matrix in UHPC under high temperature steam curing,resulting in a decrease in the degree of bonding.
关键词
高温蒸养/超高性能混凝土/力学性能/应力-应变/电镜扫描
Key words
high temperature steaming/ultra-high performance concrete/mechanical properties/stress-strain/electron microscope scanning
维普
万方数据