The Use of Polymer Modification of Bitumen for Durant Hot Asphalt Mixtures

Abstract: The add to in road traffic during the last two decades in mixture with an inadequate degree of protection due to shortage in funds has caused an accelerated and continuous deterioration of the road network in Iran. To alleviate this process, several types of procedures may be efficient, e.g., securing funds for preservation, improved roadway design, use of better quality of materials and the use of more effective construction methods. The use of polymer in asphalt combination as a modifier started in the 80s of the last century and has been tested in a number of countries around the World. In this research, SBS as one sort of polymers is used to investigate the impending prospects to enhance asphalt mixture properties. Marshall Mix design was used, first to verify the best bitumen binder content and then further to test the modified mixture properties. The optimum asphalt substance was 5.4%. Marshall Mix design requires the purpose of the percentages of air voids and air voids of mineral aggregate. The research involves selected laboratory performance tests, which were conducted on modified asphalt mixtures. The results indicated that grinded SBS polymer modifier provides better production properties. The recommended proportion of the modifier is 3% by the mass of bitumen content. It is found to raise the strength, decrease the mass and slightly enhance the air voids and the voids of sandstone aggregate