Performance of asphalt mixes using latex modified bitumen

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Abstract
Hot mix asphalt (HMA) is the most prevalent technique that used road pavements as surfacing. However, recently, the quality of the conventional flexible road surface has been questionable as a number of road surfacing deteriorated extensively. Researchers are aggressively looking up for new solutions to improve existing conventional asphalt mixtures. One of the possible solutions to improve the mixes is to use polymer s as modifier/additive in the mixture. The goal of this study was to see how natural rubber latex (NRL) affected the modified asphalt binder on the performance of hot mix asphalt mixture. Commercially produced bitumen PEN 50/70 modified with 5% NRL by weight of bitumen was used for the asphalt mixes. Dense asphaltic concrete AC14 specimens were then prepared using the modified bitumen. After that, the moisture susceptibility, resilience modulus, and rutting resistance of the asphaltic concrete specimens were assessed. The moisture susceptibility was evaluated using the Indirect Tensile Strength (ITS) test, the resilient modulus of the asphaltic specimens was evaluated using the Universal Testing Machine (UTM), and the rutting resistance was assessed using the asphalt Pavement Analyzer (APA). The results revealed that adding NRL to dense asphaltic concrete mixes improved the resilience modulus value and decreased the rutting depth while maintaining the required moisture resistance. According to the findings, the addition of NRL to bitumen upgrade the performance of dense asphaltic concrete mixtures.