BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Memento EPFL// BEGIN:VEVENT SUMMARY:ENAC Seminar Series by Dr H. Azarijafari DTSTART:20210204T151500 DTEND:20210204T160000 DTSTAMP:20260927T023624Z UID:17837078f0119222819327ec43f3a6bd132aa7cd611f79b1f361aedb CATEGORIES:Conferences - Seminars DESCRIPTION:Dr Hessam Azarijafari\n15:15 – 16:00 – Dr Hessam Azarijafa ri\nPostdoctoral Associate at Massachusetts Institute of Technology (MIT)\ , Boston\, USA\n\nThe Role of Pavements in a Sustainable Built Environment : It’s beyond materials\n\nSeveral solutions have been proposed to mitig ate the climate change impact of infrastructure systems focusing on the em bodied greenhouse gas (GHG) emissions of construction materials. However\, the life-cycle GHG emissions and the potential savings for pavement use-p hase components\, such as the albedo effect and pavement-vehicle interacti on\, have not been fully investigated. In this presentation\, the pavement life-cycle impact is discussed at project and network levels. Then\, mean ingful solutions are proposed to mitigate these emissions. To do so\, a pa vement management system model and life-cycle assessment framework were de veloped and incorporated to estimate the potential climate change impact o f pavements and to evaluate the effectiveness of proposed solutions. Withi n the urban area\, reflective pavement solutions are proposed in neighborh oods of two major cities: Phoenix and Boston. The project-level results sh ow the sensitivity to and importance of context (traffic\, climate\, and c ity morphology) in the pavement life-cycle GHG emissions and expected savi ngs from the solutions. It was found that increasing pavement reflectivity is a viable solution to lower the urban air temperature and GHG emissions in various climate conditions – offsetting 1.0-3.0% and 0.7-6.0% of the cities’ total emissions in Boston and Phoenix\, respectively. On a nati onal scale\, the network-level analysis of the U.S. pavement roads shows t hat more than 70% of the emissions are attributed to the use phase (specif ically\, pavement-vehicle interactions and radiative forcing). The simulta neous implementation of the proposed solutions for reducing the embodied a nd use-phase of pavements can potentially reduce more than 68% of the life -cycle GHG emissions on the national scale. The investigation of these sol utions under the assumptions of extreme future scenarios\, considering the changing climate\, can provide new insight into the resiliency and sustai nability of the built environment.\n\n\nShort bio:\nHessam AzariJafari is a post-doctoral associate in Concrete Sustainability Hub and Materials Sys tems Lab at the Massachusetts Institute of Technology (MIT). His backgroun d is construction management and engineering. As a principal investigator and researcher\, he has been leading different projects on the life cycle sustainability and nexus of pavement-building-vehicle. He is a voting and advisory member of several technical committees on sustainable constructio n and environmental assessment\, such as ISO 14082 Radiative Forcing Manag ement\, ACI 130- Concrete Sustainability and EC3: Embodied Carbon in Const ruction Calculator. Hessam has been serving as the chair of ACI eco-concre te competition to promote and educate life cycle sustainability to undergr aduate students in civil engineering. He received his Ph.D. from the Unive rsity of Sherbrooke in Canada. His thesis was on the development of a cons equential dynamic framework for assessing the potential environmental impa cts of pavements in a policy-making level. LOCATION:Zoom https://epfl.zoom.us/j/89795178059 STATUS:CONFIRMED END:VEVENT END:VCALENDAR