Abstract
ABSTRACT This study investigated the effects of different fillers on the rutting resistance of Cold Bitumen Emulsion Mixes (CBEM). Five fillers were used: stone dust, cement, lime, fly ash (FA) and ground granulated blast furnace slag (GGBFS). A wheel-tracking rutting test was performed at 40, 50 and 60 °C. The results showed that all treated CBEM samples had improved rutting resistance compared to the untreated sample. However, FA and GGBFS were less effective than cement due to their slower rate of hydration. Adding lime to FA and GGBFS resulted in a synergistic association, with GGBFS-lime and FA-lime treated CBEM exhibiting greater rutting resistance. The results of the multi-stress creep and recovery (MSCR) test on the cold bitumen emulsion mastic (CBEMa) were consistent with the wheel-tracking rutting data. XRD analysis revealed that improving rutting resistance was associated with the formation of hydration products in the CBEMa containing alternate fillers.
Published Version
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