Keywords: asphalt plant residue, hot mix asphalt, environmental solid wastes, sustainability, sustainable development, solid waste management, bitumen content, asphalt concrete performance, recycling
Use of asphalt plant residue in hot mix asphalt
Environmental solid wastes increase more and more as a result of the industrial waste production day by day. Management of the solid wastes is the thrust area for researchers. In this study, the effects of asphalt plant residue (APR) on the properties of hot mix asphalt (HMA)s are investigated. APR was added into the asphalt concrete in 25, 50 and 100% by weight of the filler. In order to determine optimum bitumen content, Marshall Design procedure was applied. Optimum bitumen content (OBC) values were obtained less than control specimen (CS). APR specimens have shown little increase in Marshall stability and little decrease in flow except for APR–50 in comparison to the CS. All APR specimens have higher MQ than that of the control mixture. Although there are no meaningful differences between CS and APR specimens, APR can be used as a filler aggregate in asphalt mixtures. Use of APR will enable recycling of an environmental waste as well as providing some benefits in asphalt concrete performance. Thus, resources will be used more effectively all over the world as part of sustainability.