Various studies have shown that replacement of natural aggregate by crushed waste glass on thernperformance of asphalt concrete pavements.rnThis study was intended to investigate the effect of using cullet asphalt concrete aggregate, derive thernmaximum allowable percentage and evaluate the economic advantage. Crushed glass with differentrnpercentages by total weight of the mixture was used in the study.rnCleaned and crushed, waste glass resulted from glass bottles has been added to the asphalt mixturernusing a gradation of (0/4.75) mm. Marshall Method was used to determine the Optimum BinderrnContent (OBC) and to evaluate the properties of the glasphalt mix. Using the different glass content atrntheir respective optimum asphalt content, specimens were prepared to investigate moisturernsusceptibility of asphalt mixtures. The Marshal Immersion test method was adapted to determine thernmoisture effect of mixtures. In total, 130 samples were prepared, 100 of which have been used torndetermine the OBC for each glass content, and the rest have been used to find out the moisturernsusceptibility of different percentages of crushed waste glass in the asphalt mixture.rnThe results of the experiments (Marshall Stability, flow, specific gravity & air voids) are consistent tornthe local and international specifications, except the marshal stability reduction at 20% replacementrnrate. Crushed waste glass can be used in asphalt binder course with the maximal size of 4.75mmrnand the optimum replacement 15% glass.rnKey WordsrnGlasphalt, Cullet, Hot Mix Asphalt, Moisture susceptibility, Stripping, Asphalt, Marshall Mixrndesign.