为提高玄武岩纤维(BF)与水泥基体的界面结合力和桥接作用,分别采用HCl溶液(0~2.0mol/L)和NaOH溶液(0~2.0 mol/L)对BF表面进行刻蚀糙化处理,研究纤维表面处理对BF增强水泥基复合材料的力学性能影响规律.结果表明:随着HCl溶液浓度增加,BF/水泥复合材料抗折强度与弯曲强度均先增加后降低,挠度呈现缓慢增加趋势,而抗压强度变化幅度较小;当HCl溶液浓度为1 mol/L时,BF/水泥复合材料的强度与韧性最佳;碱处理BF后,BF/水泥复合材料的力学性能随NaOH浓度增加而显著降低,且复合材料韧性无明显改善;BF经HCl溶液腐蚀后的质量保留率变化规律与NaOH溶液腐蚀后的变化规律接近,而经HCl溶液腐蚀后BF强度保留率大于NaOH溶液腐蚀后的BF强度保留率.
For enhancing the interface bonding and the bringing effect of the basalt fibers (BF) to the cement matrix,the BF was treated with different concentrations of HCl solution (0-2.0 mol/L) and NaOH solution (0-2.0 mol/L),respectively.The mechanical properties of BF reinforced cement composites were studied.The results indicate that with the increase of the concentration of HCl solution,the flexural strength and bending strength increase firstly and then decrease,midspan deflection increases slowly and the change of compressive strength of BF/cement composite is not obvious.The strength and toughness of BF/cement composite are the highest as the concentration of HCl solution is 1 mol/L.The strength of BF/cement composite decreases significantly when BF is treated with NaOH solution,and the toughness of the composite is not improved obviously.Mass ratio variation trend of BF corroded HCl solution is similar to that of BF corroded with NaOH solution while strength ratio of BF corroded HCl solution is more than that of BF corroded with the same concentrate of NaOH solution.
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