Preliminary Results on Corrosion Rate in Carbonated LC3 Concrete

Durability performance of binary and ternary blended cementitious systems with calcined clay: a RILEM TC 282-CCL, review

“…There is an interplay of the carbonation depth and the moisture availability for corrosion, making the simulation of the actual scenario very difficult. As shown in Figure 7, for different ratios of calcined clay/limestone, the corrosion rate is very similar; however, corrosion rate increases with the increase in w/b ratio [112]. These corrosion rates are still on the lower side compared to the widely reported range of corrosion rates for chloride attacked concretes, which are as high as 10 µA/cm 2 [113].…”

“…These corrosion rates are still on the lower side compared to the widely reported range of corrosion rates for chloride attacked concretes, which are as high as 10 µA/cm 2 [113]. Figure 7: Corrosion rates of LC3 mortar with different calcined clay/limestone and w/b ratios measured by Linear Polarization Resistance (LPR) technique [112] Note: LC3_65 and 50% denotes 35% and 50% replacement respectively. 1:1 and 2:1 is the ratio of calcined clay:limestone in the blends and 0,5 and 0,6 are w/b of the concrete mixture used in the study A more recent study showed that corrosion rate should be carefully assessed due to the high resistivity in the calcined clay binder systems.…”