Published: Građevinar 73 (2021) 12
Paper type: Scientific paper-Preliminary report
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The effect of filler additives on moisture damage in stone mastic asphalt (SMA) mixtures
Abstract
SMA mixtures improve the permanent deformation resistance of hot-mixed asphalt mixtures. The effects of filler additives on moisture damage of SMA mixtures are investigated in this study. The class C and class F fly ashes and hydrated lime are used as filler additives. These are replaced with filler material at 0.5%, 1.0%, 2.0%, and 4% of the total weight of the mixture. Dry and wet (slurry) methods are used in mixing the filler additives. Class C fly ash significantly improved resistance to moisture damage. However, the effect of using liquid antistripping agent with filler additives is insignificant.
KeywordsStone Mastic Asphalt (SMA), moisture damage, stripping, fly ash, hydrated lime