Influence of Fiber Types and Dosages on Mechanical Properties of UHPFRC
This study grouped variables by fiber types and dosages,and followed the process for making and curing ultra-high performance fiber reinforced concrete(UHPFRC).Using a microcomputer-controlled automatic constant-load pressure testing machine,the flexural strength and compressive strength of UHPFRC were measured to investigate the impact of fiber types and dosages on the mechanical properties of UHPFRC.The results show that as the fiber dosage increases from zero,both the compressive strength and flexural strength of UHPFRC first increase and then decrease.The maximum compressive strength of UHPFRC is achieved when the mass fraction of fibers X and J reaches 0.3%;the maximum flexural strength is reached when the mass fraction of fiber X is 0.4%and that of fiber J is 0.3%.Under the same fiber dosage,the compressive strength enhancement by fiber X is generally superior to that by fiber J,and the enhancement of flexural strength by fiber X is comprehensively better than that by fiber J.
万方数据
维普
