Engineering Recycled Asphalt Shingles into Hot Mix Asphalt Mixes: An Ontario Perspective

摘要

The University of Waterloo’s Centre for Pavement and Transportation Technology (CPATT) is committed to working with public and private sector partners to develop sustainable technologies. Recycled Asphalt Shingles (RAS) is a product that contains approximately 30 percent asphalt cement by mass. Sources of RAS include trimmings from shingle insulation and decommissioned shingle roofs. Reuse of these materials leads to financial savings through avoidance of disposal costs and reduction of the amount of virgin asphalt binder required in Hot Mix Asphalt (HMA). This paper presents results from a recent study involving Miller Paving Limited, CPATT, and Materials Manufacturing Ontario (MMO) on the usage of RAS in common Ontario HMA. This paper involves an evaluation of the properties of a surface course mix HL3 containing 1.5 percent RAS. This mix was placed at the CPATT Test Track in 2009. In addition, a comprehensive performance comparison of the streets that were paved in the Town of Markham, Ontario in 2007 is presented in this paper. Finally, an environmental life cycle assessment also is presented which uses the PaLATE software. Overall, this paper shares some best practices on key aspects of effectively using Recycled Asphalt Shingles.