玄武岩纤维及聚丙烯纤维对水泥砂浆性能影响的对比分析

以聚丙烯纤维为对比,研究了不同掺量的玄武岩纤维对水泥砂浆抗压、抗折、抗弯性能的影响,并采用扫描电子显微镜观察纤维在砂浆中的分布状态.结果表明:在最佳掺量下,玄武岩纤维水泥砂浆的各种力学性能优于聚丙烯纤维水泥砂浆并与砂浆具有更好的结合形态,可以取代聚丙烯纤维作为水泥基材料增强体,玄武岩纤维对水泥浆体早期具有显著的增强作用,但降低了水泥砂浆的28d强度;玄武岩纤维对砂浆的抗弯破坏荷载改善不显著,但明显增大了相同荷载下试件的挠度.

Comparing and Analyzing Influence of Basalt and Polypropylene Fibers on the Cement Mortar

Compared with the polypropylene fibers(PP),the influence of basalt fiber(BF) on compressive,flexural,bending performance of cement mortar and distribution pattern of fibers in cement mortar by SEM were studied and discussed.The result shows that mechanical properties of BF cement mortar are better than that of PP cement mortar at the optimum addition respectively.At the same time,BF shows the better combination patter with cement mortar than that of PP.The addition of BF into cement mortar have a greater compressive and flexural strength than blank at earlier hydration period,but had a bad influence in 28d compressive and flexural strength of cement mortar.The effect of addition of BF on the failure strength of cement mortar is not very obvious,but increase deflection remarkably at the same loading.