Abstract

Roads are the backbone of country's development, but the high level of emission generated in paving conventional bituminous pavements is always a major concern. For decades, Hot Mix Asphalt (HMA) had an upper hand in pavement construction all over the world. Hot mix asphalt was easy to produce, but required high temperatures to be maintained during transportation and laying. As HMA production involves high-energy consumption, production of bituminous mix with lower temperatures using different process is developed which is labeled as Warm Mix Asphalt Technology. In the present study, ZycoTherm additive, has been used in different dosages at different temperatures to prepare warm mix asphalt in the laboratory. ZycoTherm additive can be used with an optimal dosage of 0.07% by weight of bitumen at o o 135 C mixing temperature for WMA, and 30% RAP with 70% virgin aggregates containing 0.07% ZT WMA at 135 C, gives better stability and performance than other mixes. Hence, 30:70 is the most optimum blend. From the cost analysis, the construction cost for the 30:70 combination works out to be 9.5 lakhs per km, which shows a saving of 33.25% compared to HMA construction.

Keywords
Bituminous Concrete (BC-II), Hot Mix Asphalt (HMA), Reclaimed Asphalt Pavement (RAP), Warm Mix Asphalt (WMA), ZycoTherm.

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