Study on high toughness fiber concrete and its application performance
To reduce the cost of concrete materials and optimize the material properties,the ultra high toughness cementitious composite(UHTCC)containing polypropylene(PP)fiber was prepared in this experiment,and the material properties of UHTCC were explored by material parameter optimization experiment,SEM analysis and durability experiment.The experiment results show that the optimum diameter of PP fiber of UHTCC containing polypropylene(PP)fiber is 30μm,the optimum length of PP fiber is 8 mm,the optimum content of PP fiber is 2%,the optimum sand-binder ratio is about 0.5%,and the optimum fly ash content should be less than 65%.At this time,the high-toughness fiber concrete material cement mortar has better flow properties,higher compressive strength as well as flexuxal strength,good toughness and durability properties.To sum up,the UHTCC containing PP fiber prepared in this test not only has low cost,but also has good comprehensive performance.
NETL
NSTL
万方数据
维普
