Molecular interfacial properties and engineering performance of conductive fillers in cementitious composites

Conductive fillers, such as graphite particles (GP), steel slags (SS), and ground granulated blast furnace slag (GGBS) have been widely utilized in designing electrically conductive cementitious composites (ECCC) for various applications, including traffic detection, structural health monitoring (SHM), pavement deicing. Owing to the complex working field, a comprehensive understanding of role that fillers played ECCC is essential high-performance ECCC. In present study, mechanical conductivity experiments were conducted explore influences these on performances strengths electrical resistance. addition, reactive molecular dynamic (MD) simulation was firstly performed quantify interfacial properties GP, SS, GGBS at level. Simulation results indicated chemical components dominate atomic properties. Mineral SS or GGBS, especially Al2O3 SiO2, led stronger bonding with cement comparison GP. At last, hybrid mixing design GP proposed this balancing performance