Abstract
Asphalt industry has spent great effort to reduce mixing and compaction temperatures of the asphalt mixture because of increasing emission ratios and energy costs. The production of Warm Mix Asphalt (WMA) is related to attaining proper viscosity value of the binder to increase aggregate-binder bonding and compaction of the mixture at lower temperatures. The most important advantages of WMA are lower energy consumption and less pollution. Generally, the production temperature of the asphalt mixture depends on the asphalt properties. In this study, effects of selected warm mix asphalt additives of a certain amount by weight are investigated in terms of viscosity in a Brookfield Rotational Viscometer. The reducing viscosity of the binders will increase production and compaction ability of the mixtures. Also, it will allow to reduce mixing and compaction temperature. Therefore, with the decreased cooling rate asphalt mixtures can haul longer distances and give more time for site construction. The findings of this study show that under the same rotational speed viscosity decreases when additives are used.
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