Laboratory Evaluation of Performance Properties of Stone Matrix Asphalt (SMA) Mixtures for Using on Airfield Pavements

The aim of designing the roads and airports is to provide a structural composition on the path of motion to transport traffic in a safe, uniform and efficient way and as a result of increasing the traffic load and increasing the load on the axles and procedures, the necessity of design and implementation of stronger asphalt layers is critical to the various failures including moisture sensitivity and rutting phenomenon (as a common phenomenon in the rutting layer failure). In this study, the additives effect of SBS (% 3 and 5 %) and Lucobite (3 % and 5 %)on the performance of the asphalt mixed with the skelton of aggregates (SMA)was investigated. Marshall " s resistance tests, indirect tensile strength, resilient modulus, moisture susceptibility test (using an indirect tensile test and resilient modulus in two dry and wet conditions and Texas boiling test)were conducted to investigate the dynamic and temporal creep of the Hamburg wheel to investigate the behavior of SMA mixtures. The results showed that with the increase of polymeric additives, decrease of penetration rate and softening point were increased. The study of the results of experiments and image processing of boiling water test photographs showed that polymer additives improved the mixed resistance to moisture. Results of dynamic creep test show that by increasing the polymer additives the resistance of specimens is increased. As such, the samples containing 5 % of the SBS had the highest resistance to rutting. Also, the results showed that by increasing the polymer additives the resistance of the samples is increased.