玄武岩纤维及其格栅布对超高性能水泥基复合材料力学性能的影响规律

Influence of Basalt Fiber and Its Geotextile on Mechanical Performance of Ultra-High Performance Cement Composites

通过大掺量超细工业废渣及采用普通工艺成功制备了3类超高性能水泥基复合材料,分别测试了其7,28,90 d的抗压强度和抗折强度,并对其进行了分析。讨论了玄武岩纤维及玄武岩纤维格栅布对其力学性能的影响,并对其弯曲荷载-挠度曲线进行了分析。结果表明,玄武岩纤维体积掺量为0.5%~1.5%时可以提高混凝土的抗折强度和抗压强度,但提高幅度有限,而玄武岩纤维格栅布对提高复合材料的力学性能有明显的效果,表现出良好的增强增韧效果。

Three kinds of ultra-high performance cement composites （UHPCCs） are prepared by substitution of ultra-fine industrial wast for large quantity of cement and by using the conventional technology, The compressive strength and flexural strength are tested when the concretes are 7, 28, 90 d. The influence of basalt fiber and its geotextile on the mechanical performance of UHPCC are discussed. The flexural load-displacement curves are studied. Results show that basalt fiber with volume friction of 0.1% 0.5% has litter benefit for the accretion of the flexural strength and compressive strength of UHPCC, whereas, the geotextile of basalt fiber improves the mechanical performance of UHPCC greatly.