NCB and CNT are representative 0D and 1D carbon nanomaterials, possessing the advantages of carbon materials such as light weight, stability, good electrical and thermal conductivity. These two carbon nanomaterials can be synthesized into a “grape bunch structure” through electrostatic self-assembly. This unique structure can not only provide the morphological effects of the two-dimensionality carbon nanomaterials, but also improve the dispersibility of two carbon nanomaterials. Therefore, electrostatic self-assembly NCB/CNT, as a kind of low-density multifunctional nanomaterials, allows large-scale preparation of cement-based nanocomposites. The cement-based nanocomposites with NCB/CNT feature strong self-sensing properties, high electrical conductivity, and excellent electromagnetic properties at low content of NCB/CNT because of synergistic composition, morphological effect, high dispersivity, and low density of NCB/CNT. Therefore, they have great potential for structural modal identification and damage detection in structural health monitoring, as well as excellent application prospects in oil well infrastructures.
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