Integrated self-sensing and self-healing cementitious composite with microencapsulation of nano-carbon black and slaked lime

In this paper, multifunctional cementitious composites with integrated self-sensing and self-healing properties are developed using microencapsulation of nano-carbon black (NCB) to enclose slaked lime (SL). The results show that the cracks healing efficiency is strongly improved with NCB enclosed SL. With SL, the self-sensing capacity of NCB-cementitious composite exhibits higher and more stable piezoresistivity before or after self-healing. The NCB enclosing SL particles not only achieve excellent piezoresistivity, but also preserve SL from initial hydration. Furthermore, the remained SL can be released for further reactions in the cracks. The results provide a promising integrated multifunctional self-sensing and self-healing cementitious composite for structural health monitoring application. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

This study successfully developed multifunctional cementitious composites with self-sensing and self-healing properties by encapsulating nano-carbon black and slaked lime. The results show that the composite has high crack healing efficiency and stable self-sensing capacity.