This database contains the results of electromagnetic non-destructive (ND) evaluations of several concrete mixes in the laboratory. The measurement cells have been adapted for cores 75 mm in diameter and 70 mm high. The materials studied herein consist of three concrete mixes with Portland cement (CEM I) and various substitution rates of blast furnace slag (BFS). The ND measurement cells are used to determine the calibration curves corresponding to the DC-electrical resistivity (resp. complex permittivity) versus the water or chloride contents. These curves are requested during the step to convert the resistivity (resp. complex permittivity) profiles into either water content profiles [Eid et al. 2024] or chloride profiles [El Achrafi et al. 2023, 2024]. This study has been conducted within the framework of the French DEMCOM research project (ANR-2020-CE22-0008); it seeks to monitor reinforced concrete structures by means of embedded resistivity sensors. These structures are subjected to several environmental conditions, including: drying, wetting by rain, and chloride ingress in the case of marine exposure.