Experimental investigation of Open Graded mixes using Reclaimed Asphalt Pavement

Abstract

Open Graded Friction Course is widely used as a surface layer in the flexible pavement which is also termed as porous asphalt or popcorn mix. Open Graded Friction Course (OGFC) mix has various advantages such as increased permeability, noise reduction and enhanced surface friction, mix is mainly comprises of large coarse aggregates, little fine aggregates and maximum percentage of asphalt content which makes mix more expensive. In the present research work an attempt is made to reduce the cost of the mix by using reclaimed asphalt pavement (RAP) by replacing with conventional aggregates with increase percentage of 10, 20, 30, 40 and 50% with addition PMB 40 and Arbocell fiber as a stabilizing agent to prevent drain down. In order to determine the feasibility of using reclaimed asphalt pavement (RAP) in open graded mixes various tests such as indirect tensile test, fatigue test and rutting test is carried out. By conducting test on Air voids, Cantabro test and Drain down the optimum binder content for conventional mix and for mix with RAP is determined. From the test results it is found that 30% of RAP can be replaced with conventional aggregates in open graded mixes.