论文部分内容阅读
以高掺量粉煤灰磷酸盐水泥为基体,短切碳纤维为功能材料,制备出了磷酸盐水泥碳纤维复合材料(PCFC),同时制备了碳纤维硅酸盐基复合材料(CFRC),并利用压力试验机、交流电桥和SEM对二者的基本力学性能、导电性能及内部碳纤维分布进行了对比研究。此外还考察了碳纤维掺量、龄期对PCFC导电性能的影响。结果表明,PCFC相比CFRC在同等碳纤维掺量的情况下力学增强效果更好、导电性能更为优越;机理分析表明PCFC中存在二次“渗流”现象,而CFRC试体中则没有。SEM照片显示碳纤维掺量较高时,PCFC中的碳纤维分散得更好;龄期实验结果表明,当碳纤维掺量超过1.4%时,龄期对PCFC的导电性影响较小,具有良好的导电稳定性。
Using high-volume fly ash phosphate cement as matrix and chopped carbon fiber as functional material, phosphate cement-based carbon fiber composite (PCFC) was prepared and carbon fiber silicate-based composite (CFRC) was prepared. Testing machine, AC bridge and SEM were used to compare the basic mechanical properties, electrical conductivity and internal carbon fiber distribution. In addition, the influence of carbon fiber content and age on the conductivity of PCFC was also investigated. The results show that PCFC has better mechanical enhancement and better electrical conductivity than CFRC with the same amount of carbon fiber. The mechanical analysis shows that PCFC has secondary “seepage” phenomenon, but not in CFRC. The SEM images show that the carbon fibers in PCFC are better dispersed when the content of carbon fiber is higher. The age test results show that when the carbon fiber content exceeds 1.4%, the age has little effect on the conductivity of PCFC, and has good conductivity and stability Sex.