Electrostatic self-assembled CNT/NCB composite fillers with high CNT aspect ratio and large NCB size is incorporated into cement-based materials to develop smart cement-based composites. The mechanical, electrical and piezoresistive properties of the cement-based materials with CNT/NCB composite fillers are investigated. Percolation equation is used to describe electrically conductive property. Electrochemical impedance spectroscopy and equivalent circuits are used to explore the conductive and mechanical mechanism. The research results show that cement-based materials with CNT/NCB composite fillers at low content present acceptable mechanical property, high conductive property and stable and sensitive piezoresistive property. The fractional change of electrical resistivity, stress and strain sensitivity of cement-based materials with 1.41 vol.% CNT/NCB composite fillers can reach 13.4%, 3.12%/MPa and 521, respectively. It is concluded that high CNT aspect ratio and large NCB size in CNT/NCB composite fillers are beneficial for improving the properties of smart cement-based composites.

具有高CNT长宽比和大NCB尺寸的静电自组装CNT / NCB复合填料被掺入水泥基材料中，以开发智能水泥基复合材料。研究了具有CNT / NCB复合填料的水泥基材料的机械，电和压阻性能。渗流方程用于描述导电性能。电化学阻抗谱和等效电路用于探索导电和机械机理。研究结果表明，低含量含CNT / NCB复合填料的水泥基材料具有可接受的机械性能，高导电性能以及稳定而敏感的压阻性能。水泥基材料的电阻率，应力和应变敏感性的分数变化为1.41 vol。CNT / NCB复合填料的百分比分别可达到13.4％，3.12％/ MPa和521。结论是，CNT / NCB复合填料中较高的CNT长径比和较大的NCB尺寸有利于改善智能水泥基复合材料的性能。