玄武岩纤维增强水泥基材料的物理力学性能试验研究

Effects of basalt fibers on the physical and mechanical properties of cementitious materials

玄武岩纤维是一种新型的环保型无机纤维材料。通过对比试验研究了玄武岩纤维对水泥基材料物理力学性能的增强效果。得到玄武岩纤维能在一定程度上提高水泥基材料的抗折和抗压强度,如玄武岩纤维掺量为1.2 kg/m3时其抗折强度和抗压强度相对不掺玄武岩纤维的分别提高了1.6%和6.0%。试验进一步探讨了硅灰和减水剂在改善玄武岩纤维增强水泥基材料物理性能方面的效果。添加一定量的硅灰,促进材料的密实度,弥补玄武岩纤维会增大材料孔隙率的不利影响。在水灰比不变的情况下,添加一定量的减水剂,能改善了拌合物的流动性。

Basalt fibers is a kind of Environment-friendly inorganic fiber material.In this paper,The effect of the basalt fibers on the physical and mechanical properties of cementitious materials is studied.Results show that the flexural strength and compressive strength of cementitious materials have been improved,with an increasement of 1.6% and 6.0% respectively compared with those of base content when fibers content is about 1.2%.It is also studied on the effect of silica fume and water reducer on physical properties of the basalt fiber reinforced cementitious materi-als.The results show that silica fume can improve the compactness of the material to compensate the increase of porosity.With the same W/B（wa-ter/binder ratio）,some additional water reducer can increase the fluidity and improve the flexural strength.