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This is a collection of papers presented at The TMS Middle East - Mediterranean Materials Congress on Energy and Infrastructure Systems (MEMA 2015), a conference organized by The Minerals, Metals & Materials Society (TMS) and held in Doha, Qatar. The event focused on new materials research and development in applications of interest for Qatar and the entire Middle East and Mediterranean region. The papers in this collection are divided into five sections: (1) Sustainable Infrastructure Materials; (2) Computational Materials Design; (3) Materials for Energy Conversion and Storage; (4) Lightweight and High Performance Materials; and (5) Materials for Energy Extraction and Storage: Shape Memory Alloys.
Worldwide there is a growing interest in efficient planning and the design, construction and maintenance of transportation facilities and infrastructure assets. The 3rd International Conference on Transportation Infrastructure ICTI 2014 (Pisa, April 22-25, 2014) contains contributions on sustainable development and preservation of transportation in
Waste polymers have been studied for various applications such as energy generation and biochemical production; however, their application in asphalt roads still poses some questions. Over the last decade, several studies have reported the utilization of waste plastics in roads using different methodologies and raw materials, but there is still significant inconsistency around this topic. What is the right methodology to recycle waste plastics for road applications? What is the correct type of waste plastics to be used in road applications? What environmental concerns could arise from the use of waste plastics in road applications? Plastic Waste for Sustainable Asphalt Roads covers the various processes and techniques for the utilization of waste plastics in asphalt mixes. The book discusses the various material properties and methodologies, effects of various methodologies, and combination of various polymers. It also provides information on the compatibility between bitumen and plastics, final asphalt performance, and environmental challenges. - Discusses the processes and techniques for utilization of waste plastics in asphalt mixes. - Features a life-cycle assessment of waste plastics in road surfaces and possible Environmental Product Declarations (EPD). - Includes examples of on-field usage through various case studies.
ABSTRACT (cont.): Analysis of test results in this study indicate that excessive asphalt binder may have been used in order to meet the voids in mineral aggregates (VMA) criteria for the poor performing mixtures. This finding may be consistent with other related findings that suggest that for some coarse graded aggregate structures, addition of so much asphalt binder may be necessary to meet the current Superpave VMA specification. The VMA requirement should, therefore, be reviewed. It is also found in this study that for mixtures with excessive asphalt binder the aggregate structure may not significantly affect the rutting resistance of the mixture. This may be the case because the asphalt binder tends to have a predominant influence, especially at higher temperatures, reduces the aggregate particle interaction in the mixture and, therefore, leads to poor rutting performance. The study finds that there may be apparent relationships between rutting resistance of mixtures and the following laboratory measured parameters: (1) the rate of change of gyratory shear per cycle measured from the slope of the gyratory shear versus number of cycles (semi-logarithm scale) in the Servopac Gyratory Compactor, (2) the rut depth measured in the Asphalt Pavement Analyzer and (3) the gyratory stability index measured from the Gyratory Testing Machine.