Experience with Rubber Asphalt Concrete in Southern Saskatchewan

摘要

Rubber asphalt concrete was used in Saskatchewan for the first time in 2005. This was considered as arnvery successful project by the Southern Region of Saskatchewan Ministry of Highways and Infrastructurern(MHI) in terms of performance. In the following years, MHI constructed a total of 9 projects; in 2007 (3rnprojects including a thin lift overlay), 2008 (1 project) and 2009 (5 projects) in Southern Saskatchewanrnwith rubberized asphalt. Two of these projects had issues in terms of performance which was attributed torna relatively poor quality construction and few other factors.rnThis paper describes all these projects in detail, their suitability from climate, aggregate resources,rneconomics and overall performance to date perspective and various lessons learned from them so far.rnThese projects are being continuously monitored to date. In addition to this, the paper describes the impactrnof construction practices and the resultant density and volumetrics on the performance of the rubberrnasphalt mat.