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[Display omitted] • RAC has higher water sorptivity than natural aggregate concrete. • Water sorptivity has a strong negative linear relation with electrical resistivity. • The air content of RCA affects the sorptivity of RAC. • RAC sorptivity and saturation rate can be predicted using electrical resistivity. This paper examines the water sorptivity of recycled aggregate concrete (RAC) and shows how sorptivity can be predicted using electrical resistivity as the main predictor. The measurements in 48 RAC specimens show that RAC has higher water sorptivity and lower electrical resistivity than regular concrete. RAC sorptivity and rate of saturation prediction models were developed using multiple linear regression analysis. The prediction models include electrical resistivity, percent volume of coarse recycled concrete aggregates, and air content of residual mortar as explanatory variables. A graphical calculating device based on the sorptivity regression models was also created. [ABSTRACT FROM AUTHOR]

[Display omitted] • High coarse aggregate porosity significantly increases concrete permeability. • RCPT measurement is strongly correlated with electrical resistivity. • Water permeability is strongly correlated with formation factor. • The RCPT measurements of RAC are higher than LWAC and NWAC. • The water permeabilities of LWAC are higher than NWAC and RAC. The established relationships between concrete's electrical resistivity and permeation properties are not applicable and might differ when porous aggregates are used. In this study, the relationships of electrical resistivity with the permeation properties of lightweight aggregate concrete (LWAC) and normal weight aggregate concrete (NWAC) were determined and compared to the permeation properties of recycled aggregate concrete (RAC). Differences in the regression slope of the three concrete types were found. At the same electrical resistivity, RAC has higher chloride permeability than LWAC and NWAC. But at the same formation factor, LWAC has higher water permeability than RAC and NWAC. [ABSTRACT FROM AUTHOR]