• Greullet, Nelly Vulcano
• Hammoum, Ferhat
• Elliott, Richard
• Herrington, Phil
• Lioyd, Wyn
• Nielsen, Erik

Abstract

The research and testing reported in Chapters 4 and 5 and the assessments of these results in Chapter 6 have confirmed the potential of Epoxy Asphalt and High Performance Cementitious Material for use as long life wearing courses. This chapter examines the state of the art in production of the material mixes in commercial quantities and potential methods for construction of advanced surfacings using these materials. In doing so, the chapter explores sorne anticipated construction issues and risks, as well as indicative cost estimates for the use of these materials. In relation to construction, consideration needs to be given to a range of factors including ; the role and interests of the user agency or owner ; the materials involved and their particular needs for processing within a reasonable construction time ; transportation ; laying procedures ; testing for quality and performance ; workzone safety and traffic control ; and training. Lessons leamed from placement of the materials for the accelerated testing reported in Chapters 4 and 5 can help those responsible, identify with industry the construction issues, risks and processing requirements involved. From an economic perspective, the Phase 1 study highlighted that, for economic viability, long life surfacings would most likely only be viable on highly trafficked roads, would need to have costs within a defined cost envelope (typically around 3 times the cost of conventional wearing surfaces) and would need to be evaluated over the 30-40 year project life cycle, using 'reasonable' discount rates (e.g. around 6 per cent). Following the testing undertaken, further consideration needed to be given to indicative costs of the candidate materials, taking into, account the experience gained with the preparation and testing during the Phase II work. Consideration also needed to be given to any health and safety risks associated with use of the candidate materials as well as to environmental aspects including recyclability of the materials at the end of their useful life. These aspects are discussed in sorne detail for Epoxy Asphalt and HPCM in the following individual sections. Aspects common to both Epoxy Asphalt and HPCM are addressed after the individual Epoxy Asphalt and HPCM sections.

Topics

• surface
• phase