Comparison between Rubber-Silicon and Polyethylene as an Additive to Hot Mix Asphalt Design
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Hot Mix Asphalt, Polyethylene Therephthalate, Rubber-Silicon, Marshal Mix Design.
Abstract
To prevent asphalt pavement distresses there are various solutions such as adopting new mix designs or utilization of asphalt additives. The primary aim of this study was to investigate the effect of adding rubber-silicon and Polyethylene Therephthalate (PET) waste bottles as an additive to dense-graded mixture performance properties. This study investigated the essential aspects of modified asphalt mixtures in order to better understand the influence of rubber-silicon and polyethylene modifiers on volumetric and mechanical properties of dense-graded Hot Mix Asphalt (HMA). Marshal mix design was carried out for different type of asphalt binder to determine the different mix design characteristics. In this study three asphalt content were used: virgin bitumen 60/70 penetration grade, bitumen 60/70 added 4% rubber-silicon and bitumen 60/70 added 8% (PET) by weight of the bitumen content. The optimum Asphalt content (OAC) of a mixtures were found to be 4.91 % for HMA modified by rubber-silicon, 5.17% for HMA modified by (PET) and 5.21% for HMA modified by virgin bitumen 60/70 without additive.
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