Durability Deterioration of Geopolymer Stabilized Soft Soil under Sodium Sulfate and Magnesium Sulfate Attack: A Comparative Study

Sulfate attack is one of the non-negligible factors that induces deterioration in performance and life cycle soil stabilizers. In this paper, degradation mechanism durability slag–fly-ash-based geopolymer stabilized soft (hitherto referred to as SF-GSSS) under sodium sulfate (Na2SO4) magnesium (MgSO4) environment comparatively investigated, slag/fly ash ratios are set S10F0, S9F1, S8F2, S7F3. The SF-GSSS was fully immersed a 2.5% Na2SO4 solution MgSO4 solution, respectively, characterize rules via visual observations, an unconfined compressive strength (UCS) test, by mass change. effect on microstructural characteristics were determined different microanalytical means, such X-ray diffraction (XRD) scanning electron microscopy (SEM). results showed displayed significant physical deterioration, but not when solution. growth significantly lower than it at same immersion age. rate loss lowest for S9F1 highest S7F3 end immersion, regardless its or solutions.