A study is reported which investigated the effects of verglimit and plusride rubber on the performance of asphalt mixtures. The study examined the additives in terms of their effects on moisture damage, rutting, and low temperature cracking. The tests included indirect tensile strengths, incremental creep moduli and permanent strains, and repeated load moduli and permanent strains. Specimens were moisture conditioned to determine retained tensile strength ratios, retained resilient modulus ratios, and visual stripping. The background to the study is described as well as the details of the testing program and results. Verglimit provided marshall stabilities and flows similar to the control, and mixtures were found to have low retained tensile strength and resilient modulus ratios. Thus verglimit increased the moisture susceptibilities of the mixtures. Plusride also showed that the rubber particles increased the moisture susceptibilities of the mixtures. The article presents recommendations.
Abstract