Mechanical Properties of Open Graded Asphalt Mixtures with Pumice Aggregate

Open graded asphalt is used as a wearing course to provide both increased safety inwet weather (through reduced surface water and spray during rain) and reduced noise levels. In thisstudy, Pumice aggregates were applied as a portion of fine aggregate for the improvement of dynamicalspecification of porous asphalt and the Cantabro, Los Angeles abrasion, and the bitumen precipitationtests were conducted. First, the amount of optimized bitumen related to each of the three types ofaggregates and fine Pumice has been estimated, then the properties of the Marshall Resistance andindirect tensile strength have been assigned. Mixtures with 5 percent of fine Pumice has shown bettercharacteristics in Marshall test as well as indirect tensile strength. Also, the results of dynamic creeptest showed that the rutting potential decreased by using Pumice aggregate. There is the best amount ofpermanent deformation for mixtures containing 5% Pumice.