Rut Depth Characteristics on Hot Mix Asphalt with Addition Nano Crumb Rubber

Abstract

The pavement construction is designed by considering the factor of resistance to deformation due to the repetition of wheel loads. Other factors are the influence of the wheel load, the condition of the increase in temperature on the road surface, which is the cause of the decrease in the strength of the road surface layers. The deformation of the road surface due to wheel tracks occurs when an increase in tensile stress at high temperatures due to wheel loads occurs. The relationship between the number of wheel tracks and permanent stresses that occur on the road surface can be known to be analyzed through the wheel tracking test. This study aims to determine the effect of the addition of nano-sized use of rubber tires on increasing the resistance of hot mix asphalt to the effect of temperature due to vehicle wheel loads. This use of tire waste has been processed to nano-sized granules called nano crumb rubber; this material is added to the Asphalt Concrete Wearing Course hot mix asphalt. This material addition of 0%, 1.25%, 2.5%, 3.75%, and 5% of the asphalt content in hot mix asphalt. The Nano Crumb Rubber is added to the aggregate at the mixing temperature 130℃, before mixing the aggregate with asphalt. The optimum asphalt content is obtained through a Marshall standard test; the research is continued by conducting the Wheel Tracking Machine test. The results of the test found that the addition of Nano Crumb Rubber in the asphalt mixture will improve the quality of the mixture, especially at high temperatures, increase the quality of the addition of 1.25% and continue the addition of 5%. However, the addition of Nano Crumb Rubber > 1.25% decreased performance due to high temperatures. The test results at 40&#8451 and 60&#8451 with the addition of 1.25% are the hot mix asphalt with the best performance. The use of Nano Crumb Rubber in hot mix asphalt requires a smaller amount compared to Crumb Rubber.