This study investigates the chloride penetration resistance of fine recycled aggregate concrete (FRAC). Six mixes comprising 0.45 and 0.55 w/b were prepared using aggregates (FRA) at 0, 25 50% by volume replacement natural sand. The was tested surface electrical resistivity (SER), conductivity index (CCI), bulk diffusion tests. SER CCI tests conducted after 28 days 180 wet curing, while test ca...