矿渣棉纤维对水泥基复合材料性能的影响

Effect of Slag Wool Fiber on Properties of Cement Based Composite

以玄武岩纤维及聚丙烯纤维为对比,文章研究了不同掺量的矿渣棉纤维对水泥砂浆抗折、抗压强度以及干缩性能的影响,并采用SEM观察矿渣棉纤维在砂浆中的分布状态。结果表明:矿渣棉纤维能够提高砂浆试件的抗折、抗压强度,改善水泥砂浆的干缩性能。试件内的矿渣棉纤维表面粘结大量的水化产物,与基体有很好的结合形态,但纤维也受到一定的腐蚀,性能下降。纤维掺量为0.48%时,玄武岩纤维及聚丙烯纤维增强水泥砂浆后期的力学性能优于矿渣棉纤维。

Compared with basalt fiber（BF） and the polypropy/ene fiber（ PP）, the influences of slag wool fiber on the compressive ,flexural performances of cement mortar and the distribution pattern of fibers in cement mortar by SEM were studied and discussed. The results show that the flexural and compressive strengths of mortar specimens and the dry shrinkage performance of cement mortar could be improved by slag wool fiber. In the sample, a large number of hydration products are adhered on the surface of the slag wool fiber and show great combination pattern with ce- ment mortar, but the fiber is also subjected to certain corrosion so that its performance is derreased. The mechanical properties of basalt fiber and polypropylene fiber reinforced cement mortar are better than that of slag wool fiber when the fiber content of fiber is 0. 48%.