采用3、6、9 mm长的玄武岩纤维(Basalt Fiber,BF)按照 1∶1 的比例与 6、9 mm长的聚乙烯醇(Polyvinyl Alcohol,PVA)纤维混掺入水泥基体中制备了BF/PVA水泥基复合材料,研究不同长度BF、PVA纤维混掺体系对水泥基材料力学性能的影响.结果表明:纤维总掺量为0.2%时,BF/PVA水泥基复合材料在7、14 d抗折、抗压均表现出良好的性能,混掺6mmBF与 6 mm PVA 纤维的试件 7、14 d抗折强度分别达到 7.6、8.4 MPa,与单掺0.2%的6 mm PVA纤维的试件相比增幅达到26.67%、29.23%;9 mm PVA纤维与3、6、9 mm BF混掺体系中,7、14 d抗折强度均表现出明显的增强,且抗折强度最优值出现在9 mm PVA纤维与6mmBF混掺的试件,其值分别达到了7.9、8.9 MPa,混掺效果最佳.
Study on the Properties of Basalt Fiber Hybriding with Polyvinyl Alcohol Fiber Cement-based Composite Materials
The hybriding systems containing 3、6、9 mm Basalt Fiber(BF)and 6、9 mm Polyvinyl Alcohol(PVA)fiber at the weight ratio of 1∶1 were incorporated into the cement matrix to prepare BF/PVA cement-based composites.The influence of the different lengths of BF and PVA fiber hybriding systems on the mechanical properties of BF/PVA cement-based composites was studied thoroughly.The results indicate that the BF/PVA cement-based composites curing for 7、14 days respectively containing 9 mm PVA fiber and 3、6、9 mm BF exhibit the good flexural and compressive properties by controlling the weight fraction of the total fibers within 0.2%.The flexural strength of the specimen containing with 6 mm BF and PVA fiber achieves 7.6、8.4 MPa curing for 7、14 days,respectively.Compared with the specimen with addition of 0.2%PVA fiber,the increase of the flexural strength of the6P/6B achieves 26.67%、29.23%increase,respectively.In the hybriding system of 9 mm PVA fibers and 3、6、9 mm BF,the significant enhancement could be observed in the flexural strength especally for the 6 mm BF hybriding with 9 mm PVA specimen.The flexural strength of 9P/6B could reach 7.9、8.9 MPa curing for 7、14 days,which shows the best hybriding performance of BF and PVA fibers.
万方数据
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