摘   要：研究了龄期和碳纳米管掺量对复掺碳纳米管/碳纤维水泥基材料电化学阻抗谱的影响，结合碳纳米管/碳纤维复掺水泥基材料等效电路图，分析了碳纳米管/碳纤维复掺水泥基材料导电性能的影响因素。结果表明，随着碳纳米管掺量的增加，碳纳米管改性水泥基材料阻抗值降低；随着龄期的增长，碳纳米管改性水泥基材料阻抗值逐渐增加；随着碳纳米管掺量增加，碳纤维/碳纳米管复掺水泥基材料孔溶液的电阻Rs几乎不变，0.2%碳纤维/0.5%碳纳米管水泥基材料的电荷传递电阻Rct值相比于0.2%碳纤维水泥基材料的Rct值减小了91.1%，基体电阻Rc值减小了95%，说明碳纳米管能大大改善水泥基材料导电性能。
Abstract: The impact of the age and dosage of carbon nanotubes on the electrochemical impedance spectroscopy of carbon nanotubes/carbon fiber modified cement-based materials was studied, and the equivalent circuit diagram  of carbon nanotubes/carbon fiber modified cement-based materials was studied to analyze the influencing factor on the conductive mechanism of carbon nanotubes/carbon fiber modified cement-based materials. The results show that as the dosage of carbon nanotubes increases,  impedance values of carbon nanotubes modified cement-based materials will reduce. The impedance values of carbon nanotubes modified cement-based materials will increase as time goes on. With the content of carbon nanotube increasing, resistance Rct produced by reaction of charge transferring and the impedance values of carbon nanotubes/carbon fiber modified cement-based materials reduce with resistance Rs of pore solution Rs abidingly. Rct values of 0.2% carbon fiber/0.5% carbon nanotube  modified cement-based materials compared to Rct of the 0.2% carbon fiber cement-based materials values decreases by 91.1%  and the Rc value decreases by 95%, which illustrates carbon nanotube can greatly improve the conductive performance of cement-based materials.