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碳纤维硫铝酸盐水泥基机敏复合材料

, PP. 114-119

Keywords: 碳纤维,硫铝酸盐水泥,机敏性能,介电常数

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Abstract:

采用压制成型方法制备了碳纤维硫铝酸盐水泥基复合材料(CarbonFiberReinforcedSulphoaluminateCement,简称CFRS)。用XRD和孔结构分析仪对复合材料的物相和孔径与孔体积的关系进行了分析,研究了不同碳纤维掺量对复合材料在单调压应力和循环压应力下的机敏性能的影响。XRD和孔结构分析研究结果表明,压制成形的试样水化14天硫铝酸盐水泥水化仍不完全,试样结构致密,孔隙率较小,孔径基本小于0.9μm;单调压应力下机敏测试性能表明,碳纤维掺量为0.3%和0.5%的CFRS试样电容变化率与压应力近似成线性关系,机敏性能较好;循环压应力下碳纤维掺量为0.7%的CFRS试样电容变化率与循环压应力成一一对应关系,表现出较好的机敏特性。

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