Hydrated lime addition effect on the stability and durability of modified open-graded friction course

An open-graded friction course is an asphalt mixture with a high percentage of coarse aggregates that are almost uniform in size, resulting in a high percentage of air voids, typically 15 to 20 %. The main advantages of the mix are increased safety due to increased frictional properties of the pavement surface and the ability of surface water to drain through the pavement. One of the disadvantages of an open-graded friction course is less stability, and a large void makes the layer easy to strip. An additional material that promises to increase stability and durability is hydrated lime. Therefore, this study aims, to investigate the effect of hydrated lime on a modified open-graded friction course on stability and durability. The method used in the study is the Marshall stability and particle loss test. The result shows that modification of the open-graded friction course with cellulose fiber and hydrated lime increases stability, and decreases particle loss.