ABSTRACT
Cement mortar specimens measuring 50 × 50 × 50 mm were cast with sand to cement ratio of 2.5 and the water to cement ratio of 0.5. After 28 days of curing, the mortar specimens were divided into two groups. One group of specimens was continuously cured under water while the second group was placed in 1%, 2%, and 4% sodium and magnesium sulfate solutions. These conditions represent very severe sulfate exposure conditions according to ACI 318-99. The effect of sulfate concentration on the performance of selected cements was evaluated by visual examination and measuring the reduction in compressive strength.
