EFFECTS OF MgSO4 AND Na2SO4 SOLUTIONS ON CONCRETE MORTARS FROM CEMENT TYPES PKC 32.5 AND PC 42.5

Sabit OYMAEL¹

Hydration products of various types of cement differ in both quantitative and qualitative aspects. This study aims to determine the nature and severity of such difference under certain Sulphate conditions. Investigated to this end were changes at intervals in physical and chemical behaviors of standard sand mortars from cement types PKC 32.5/B and PC 42.5 in Na2SO4 and MgSO4 sulphate conditions. Mortar specimens cast in 40x40x160 mm mould were let to cure for 14 and 28 days in fresh water in addition to medium containing 5% and 10% Na2SO4 and MgSO4 sulphate solutions. Several physical and chemical analyses and measurements with XRD and SEM instruments revealed that solution with MgSO4 had a more detrimental effect than did Na2SO4 solution and that specimens in MgSO4 solution had relatively lower compressive strength. In the study mortars from cement type KPC 32.5/B proved higher resistance to Sulphate medium than did mortars from cement type PC 42.5.

Keywords
Mortar, Pozzolan, Compressive Strength, Sulphate R,