Effect of Mechanical Properties of Cold Mix Asphalt Mixture Containing Different Proportion of Fillers

Cold mix asphalt (CMA) technology is the most sustainable technology (green) available for the construction of flexible pavement to date, owing to the lower production temperatures involved. The present research investigates different fillers such as cement, fly ash (FA), and Stabil-road (SR) in different proportions ranging from 0 to 3% (1% increment). One control CMA with 1.5% water content and 6.6%asphalt residue and nine mixes with variable filler contents were prepared and tested according to the standards. The prepared mixes were tested and analyzed for mechanical properties namely Marshall stability, indirect tensile strength, resilient modulus (M-r), and abrasion loss. The stability of the CMA with 3% cement was 22% higher compared to the control CMA. Improvements in strength were observed with the inclusion of filler in the cold mix. The cold mix bituminous macadam (CMBM) is used for low-volume roads with mineral fillers, and it is a type of CMA, but using FA and SR, the strength and workability of the CMBM mix can be improved, and the mineral filler can be replaced by industrial waste. Significant reductions in production temperature and improved service life are some of the study's outcomes. It is a significant study because it reduces the asphalt production temperature and increases the pavement service life. It reduces energy loss during the construction of road pavement. Furthermore, the mechanical properties of the designed CMA depend on the mixing of aggregates, prewetting water content, emulsion, curing time, and pulse repetition periods.