Abstract
With the growing concern on global warming, there is a constant demand for technologies which can help reduce emissions. One such technology is warm mix asphalt (WMA) which reduces the mixing and compaction temperatures of the pavement materials leading to less energy consumption, fewer emissions, better workability, and reduced aging. One of the WMA techniques is foaming of bitumen which works on the concept of injecting cold water into the asphalt binder in order to create foam. In this study, conducted in the Rajasthan state of India, tests were conducted to adjudge the strength and moisture susceptibility of foamed bitumen-treated reclaimed asphalt pavement (RAP). Eighty-four percent RAP was mixed with 15% stone dust and 1% active filler; and trials were conducted to determine the optimum percentage of foamed bitumen and water to be injected. Indirect tensile strength tests (wet and dry) were conducted and the results were found to be within satisfactory ranges. Tensile strength ratio was also calculated and established to be under permissible limits. This study shows the utilization of reclaimed asphalt pavements as a sustainable measure for road construction having fewer adversities on the environment by re-using the old pavement materials.
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