Experimental study on time-dependent DC resistivity of cement-based material considering microstructure and ion concentration
Yizhan Peng, Fuyuan Gong, Zhao Wang, Yuxi Zhao, Weiliang Jin, Tao Meng, Koichi Maekawa
Abstract
This study aims to investigate the time-dependent direct current (DC) resistivity of cement-based materials considering various influential factors. Results show that a decreasing water-cement ratio, saturation degree, ion concentration and applied voltage, or an increasing curing age and amount of aggregate will lead to an increasing resistivity. In addition, it is found that the changing DC resistivity mainly results from the migration of conductive ions. Finally, the DC resistivity model proposed in the research has an accuracy of error less than ± 10 %.
Topics & Concepts
Electrical resistivity and conductivityMaterials scienceMicrostructureCementComposite materialIonCuring (chemistry)Electrical conductorSaturation (graph theory)Direct currentConductivityVoltageElectrical engineeringChemistryEngineeringMathematicsCombinatoricsPhysical chemistryOrganic chemistrySmart Materials for ConstructionConcrete Corrosion and DurabilityConcrete and Cement Materials Research