Abstract: In order to study the elleet of aggregate particle size on the performance of pervious conerete ,pervious concrete was prepared using three different aggregate sizes, both in single-sized and gradedforms. The compressive strength, porosity, and permeability of the conerete were tested. The resultsshow that for pervious conerete prepared with single-sized aggregates, the compressive strength is highestwhen the aggregate size is between 4. 75 and 9. 5 mm. When two sizes of aggregates are mixed, the com-pressive strength of the specimen inereases slowly with the proportion of small-sized aggregate added, andinereases first and then decreases with the proportion of larger-sized aggregates. The elfect of different aggregate gradations on the permeability of pervious conerete is opposite to its ellect on compressivestrength. For pervious concrete made with single-sized aggregates, permeability is best when the aggregate size is between 9. 5 and 16 mm. For pervious conerete made with two sizes of aggregates, permeabil.ity decreases as the proportion of small-sized aggregate increases , while it increases as the proportion ollarge-sized aggregate increases. The permeability of pervious conerete made with aggregates of three dif.ferent particle sizes is the worst.

Key words: pervious conerete, aggregate gradation, permeability, effective porosity