The effect of electrical pulse on sulfate resistance of mortars was investigated.The parameters involved in this study included type of associated cations, water/cement ratio and mineral admixtures for a part of cement.For comparison, specimens with the same mixture were immersed in sulfate solutions.The performance of specimens was evaluated by measurement of sulfate-ion content and mechanical resistances (flexural and compressive strengths).Meanwhile, the microstructures of the damaged specimens were examined by scanning electron microscope (SEM) equipped with an energy dispersive X-ray analyzer (EDXA).The results showed that electrical pulse greatly sped up the migration of sulfate ions and subsequently accelerated the deterioration of mortars due to sulfate attack.When MgSO4 was used as the attack solution in electrical pulse test, some C-S-H gel converted into non-cohesive magnesium silicate hydrate (M-S-H), resulting in greater strength losses of the specimens compared with that caused by Na2SO4 attack.Reducing water/cement ratio improved sulfate resistance.However, after 90 days of electrical pulse test, relative flexural and compressive strengths of the mortar with water/cement ratio of 0.30 decreased to 90% and 88% respectively, indicating that electrical pulse still resulted in accelerated sulfate corrosion of cement-based materials with low water/binder ratio.Although the blended cement mortars had better sulfate resistance, the notable reductions in strengths were observed at the end of 90 days of electrical pulse test.The acceleration of sulfate attack using electrical pulse provides a new idea in rapidly evaluating sulfate resistance of cement-based materials.