“…This result gave the same results with concretes containing NA (24,26). Considering the results of chloride ion penetration into RAC (as shown in Figures 11 and 12), the depths of chloride ion penetration for the RA20, RA35 and RA50 concretes (GBA replacement levels of 20, 35 and 50%, respectively) were 20, 14.7 and 13.3 mm at the age of 28 days, which was approximately 9, 33 and 40% lower than that of the RA concrete, respectively, and decreased to 14.9, 9.2 and 7.7 mm at the age of 90 days, which was approximately 27, 55 and 62% lower than that of the RA concrete, respectively.…”