Environmental Condition Dependent Electrical Resistivity of High Performance Fiber-Reinforced Concretes*

Abstract

High-performance fiber-reinforced concretes (HPFRCs), including ultra-high-performance fiber-reinforced concretes (UHPFRCs) refers to smart construction materials those can monitor themselves by determining their electrical resistivity under loading, i.e., the electrical resistivity importantly governs the such smart property of HPFRCs. In this research work, the influences of environmental condition on the electrical resistivity of HPFRCs were experimentally reported. The electrical resistivities of HPFRCs were measured under controlled temperature and relative humidity using a chamber machine. As the temperature or relative humidity increased, the electrical resistivity of the studied HPFRCs clearly decreased. The electrical resistivities of cement-based composites were generally dependent much upon temperature and relative humidity.