On the relationship between porosity and electrical resistivity in cementitious systems

Corrosión por cloruros del acero de refuerzo embebido en concreto con agregado grueso reciclado y materiales cementantes suplementarios

“…In the case of RCA concrete, it has greater porosity than conventional concretes (Gómez, 2002;Tam et al, 2005;Etxeberría et al, 2007). On the other hand, it has been demonstrated that concrete electric resistivity is associated with the microstructure of cement matrix (pores distribution) and with the corrosion rate of reinforced steel (Tumidajski et al, 1996;Tumidajski, 2005;Polder et al, 2000). Therefore, the electric resistivity is used as a parameter to evaluate concrete durability.…”

Non-destructive Electrical Methods for Measuring the Physical Characteristics of Porous Materials

“…Obviously, the nature of the fluid plays an important role; the higher the salt concentration of water is, the more conductive it becomes. There are several models relating the porosity and the EC, initially developed for sedimentary rocks, but can still be applied to all types of rocks and other cementitious materials [36][37][38][39]. The conduction relationship within porous materials is described by Archie's empirical law (1942).…”

Microstructure-Based Prediction Model for Chloride Ion Diffusivity in Hydrated Cement Paste

“…(6) According to the study cited [20], the tortuosity coefficient of the matrix or the combination of the matrix and other phases approximately equals 1. The percolation phenomenon reflects the fact that the volume fraction of the more permeable phase has a threshold above which a continuous transport path occurs, as shown in Figure 8.…”

“…The quantity of hydration products and pores varies with the hydration process, and the hydration products have different contributions to the transport performance. Pores have a significant impact on transport performance, and previous studies have investigated the effects of pore volume, size distribution, and critical size on transport performance [6], but the effects of other hydration products have not been rigorously studied. More studies focus on the relationship between the microstructure and material properties [7][8][9][10].…”