Effect of curing conditions on freeze-thaw de-icing salt resistance of blast furnace slag cement mortars

摘要

The freeze-thaw de-icing salt scaling resistance tests were performed on blast furnace slag cement (BFSC) mortars, which were cured in 3% NaCl solution, tap water (with/without plastic bags), demineralised water, CaSO{sub}4 saturated solution, Ca(OH){sub}2 saturated solution or NaOH saturated solutions. Additionally, the effect of carbonation on the scaling resistance was studied. The effect of carbonation on the microstructure of the BFSC mortar skin was investigated by optical microscopy. The results showed that de-icing salt scaling resistance of a BFSC mortar is strongly dependent on the occurrence of carbonation during curing regime and to a less extent on the chemical composition of curing water.