Enhancing Sulfate Attack Resistance of Pervious Concrete with Glass Powder

Sulfate attack has become a serious concern for buildings and infrastructure. In particular, the porous structure of pervious concrete makes it more susceptible to sulfate attack. To address this issue, glass powder (GP) was incorporated into pervious concrete, and the resulting strength, permeability, and sulfate attack resistance were evaluated. The results showed that the pervious concrete incorporating GP had a lower early strength and a higher later strength compared to the pervious concrete without GP. The permeability showed an increasing trend, followed by a decline, with an increase in GP content. The content of GP had a greater impact on the permeability than the particle size of the GP. Increasing the GP content caused the permeability coefficient to rise first and then drop, reaching its maximum at a 15% content. The compressive strength of the ordinary specimen and the specimen incorporating 15% GP decreased by 25.5% and 20% after 60 wet–dry cycles of exposure to 5% Na2SO4 solution. With GP incorporation, pervious concrete shows reduced erosion product formation and enhanced sulfate attack resistance.