Riny Yolandha Parapat*, Imam Aschuri, Jono Suhartono, Michael Schwarze and Reinhard Schomäcker
The number of cars continues to increase due to the worldwide economic growth. This gives an impact not only on the condition of the roads, but also on the accumulation of tire waste. Research on improving the quality of road asphalt by utilizing crumb rubber (CR) from car tires has been carried out by many researchers and has given positive results. However, each researcher suggests a different composition of CR to get the best quality of asphalt rubber. This study provides an overview and prediction regarding the efficiency of Nano Asphalt Rubber (NAR) production by using Central Composite Method (CCM) and Response Surface Method (RSM). This work can give an idea to the researcher or decision maker of how much CR should be added in asphalt mixture to get the optimum result, especially when using Asbuton as the bitumen source. The results of the optimization using the CCM and RSM in Minitab® i.e. regression equations, contour plot and surface plots, can be used to see the Yield range of AR production. The NAR production is carried out by extracting the Asbuton (in-situ) with ultrasonication technique and mixing it with CR according to a 5-factors full factorial design. The result shows that the highest NAR Yield in the optimization process can reach 99.9%.
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