| In this research, a comprehensive experimental program utilizing American Association of State Highway and Transportation Officials (AASHTO) recommended repeated load triaxial tests was designed to characterize the resilient behavior of RAP aggregates in both natural and stabilized forms. Amendments were done by using different dosage levels of Portland (Type I/II) cement and with fibrillated polypropylene fibers. Compacted aggregate specimens with no fibers (control specimens) were tested at 0, 2, and 4% dosage levels of Portland cement and those with fibers (fiber-reinforced) were tested at 2, 4, and 6% dosage levels of Portland cement.; Test results indicate that cement and cement fiber treatment provided enhancements that are statistically significant. Both two and three parameter models were used to analyze the present experimental moduli results. The structural coefficients were determined using AASHTO recommended correlation and these values were used in the development of design charts and tables for the estimation of base material thickness for a variety of variables including subgrade, traffic and category of pavements. (Abstract shortened by UMI.)... |
