The 4th Asian Concrete Federation Symposium on Emerging Technologies for Structural Longevity (ACF2023- ETSL)

169 / 2022-04-30 13:02:51

Study on chloride binding property of slag blended cement considering different slag blending ratios

Slag Blended Cement,Blast Furnace Slag,Chloride Binding,Friedel’s salt

In the present study, the influence of slag blending ratio in blended cement on chloride binding property was investigated along with water-to-binder (w/b) ratio and temperature. Slag blends were found effective in chloride binding than OPC and 50% slag blends provided highest values, which was mainly because of comparably high chemical binding due to formation of Friedel’s salt with high alumina content of slag. For 50% slag blending ratio with w/b ratio 0.5, total bound chloride increased by about 47% and 48% than OPC at 20ºC and 40ºC, respectively, at free chloride concentration 3.0 mol/L, whereas for w/b ratio 0.3, it was about 10% and 27%.