Warm Mix Asphalt Using RAP for the Egyptian Roads

Abstract

“Sustainability is a priority interest for many organizations these days”. Asphalt paving industry is a front-runner in the field of sustainability. Today, Warm mix asphalt (WMA) and recycled asphalt pavement (RAP) are the most well-known sustainable materials in asphalt concrete industry. WMA is based on the use of water, wax, or chemical additives which allows a remarkable reduction in production temperature which in turn achieves a lot of advantages such as reduced fuel consumption, improved working conditions, reduced emissions of greenhouse gases, and a promising RAP content increases. RAP is defined as the aged asphalt mixture resulting from different sources like pavement milling process, full pavement destruction, and asphalt plant wastage. Several reasons encourage the use of RAP in the asphalt industry, economic and environmental advantages are the two main reasons for these encouragements. RAP is a suitable substitute for virgin resources because it limits the use of virgin aggregate and asphalt cement needed to produce asphalt mixtures. Furthermore, RAP limits the amount of construction wreckages laid down into landfills and saves world nonrenewable natural resources like virgin aggregate and asphalt cement. At last, using RAP generates a rotation that enhances the use of world natural resources and expands the asphalt industry.