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CRISPS Webinar: Epoxy Modified Bitumen – Performance from Laboratory Test, Trials and Applications to Date
December 14, 2021 @ 8:00 am – 9:00 am CET
About the Webinar
Roads are the backbone of any countries’ economy and communities’ socio-wellbeing. Sparsely populated regions around the world rely heavily on their roads for the transportation of goods and people. Unbound granular pavements with conventional chip seals are ideal for using local labour and materials. Surfaces require considerable maintenance using appropriately skilled labour, typically every 8-12 years on high-volume roads. This makes them less than ideal for Low-Income Countries (LICs) with restricted maintenance budgets. Pavements containing asphaltic layers can be built to require little maintenance over long periods but are expensive to build, require specialist skills, and expensive construction machinery.
Of additional concern with traditional technologies in Africa’s LICs is their performance on roads subject to prolonged periods of extreme temperatures, since this can lead to bitumen bleeding/tracking down the road and road surfaces being torn apart. Climate change is expected to increase the duration and number of such extreme temperature events in parts of Africa and Asia. This research investigates the feasibility of using Modified Epoxy bitumen in Porous Asphalt (MEAC) and Chip Seals (MECS) which addresses climate-related issues with conventional bitumen in asphalt and chip seal. This technology can be used to build unbound granular pavements (locally built with as much or as little labour as desired) with MECS and MEAC which would produce a long-life pavement with little need for maintenance. It would also need low investment in machinery. Initial research outcomes suggested these surfaces have the potential to last more than 40 years.
This webinar presented some early findings from the “Climate resilient sustainable road pavement surfacing (CRISPS)” research programme funded by the UK Aid’s High Volume Transport Applied Research Programme (HVT) in collaboration with the University of Birmingham (UoB), the University of Auckland (UoA), the Universiti Putra Malaysia (UPM) and the International Road Federation (IRF). The webinar covered an introduction to the Epoxy Modified Bitumen performance from laboratory test, trials and applications to date. It also provided the methodology used for calibrating HDM-4 deterioration models using Long-term Performance Programme data and laboratory results.