Ipwea 2016 Sustainability Paper

S Camarena (1)1Factor Ten, Vic

This paper summarises the latest research in the context of national and internationalasset climate resilience and life-cycle costs assessment trends. Based on Australian on-the-groundexperience, it proposes a step by step approach to sustainable unsealed roads maintenance.The realities of operating "as we always have" changed and maintaining roads in a world of finiteresources requires a circular view of the work. This pushes all involved in public works to considerrejuvenating the road by re-cycling in-situ material, stabilising with environmentally friendly additivesand ensuring quality water run off. The benefits need to be calculated over the life cycle of the assetand include externalities.However with ongoing cuts to their budgets, raw materials increasing cost and growing road usersexpectations, asset managers struggle to move out of the day to day priorities to establish moreresilient and sustainable maintenance regimes.A series of case studies and research papers were conducted demonstrating the ability to use anenvironmentally friendly polymer-based product to stabilise unsealed roads with significant financialresults (70% cost reduction over 5 years), environmental savings (90% carbon emissions, 80% waterusage) and structural benefits (increased density, strength, elasticity and toughness).Collaboration between suppliers, local councils, universities, engineering and mining companiesprovided insights on how to integrate the use of innovative products and methods, and the ability topresent a business case for the long-term financial, operational and environmental benefits.The results point to increased financial and climate resilience for the maintenance of the assetsdemonstrating that it is possible to cut the costs of the maintenance programme whilst improving thepavement performance. The demonstrated leadership also paid off in the level of innovation andcollaboration shown by the teams involved and how they significantly reduced the environmentalimpacts of their activities.


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