01090162

Component

The first major high-volume freeway trial of Stone Mastic Asphalt (SMA) in Canada was constructed on Highway 401 west of Toronto in 1996. SMA is a heavy duty, gap-graded hot mix asphalt, composed of 100 percent crushed coarse aggregate and mastic stabilized asphalt cement. The performance to date has shown that the SMA aggregate skeleton with stone-on-stone contact will withstand rutting due to heavy truckloads. Additional asphalt cement binder provides increased durability, and resistance to aging and cracking of the mix. Stabilization of the additional asphalt cement and prevention of binder run-off during construction are achieved through an increase in fines and filler, the addition of fibres, and polymer-modification. This paper describes the 10-year performance of Canada’s first full-scale SMA freeway trial. SMA was constructed on Highway 401 adjacent to a Dense Friction Course (DFC) for the purpose of comparing field performance. Since construction in 1996, the Ministry of Transportation of Ontario (MTO) has been monitoring the performance of both the SMA and DFC mixes. Performance evaluation has included annual roughness and rutting measurement, frictional properties, and manual distress surveys. The results of ten years of performance evaluation are presented in detail, with the results indicating that both the SMA and DFC are performing well.

01084478

08-1613

English

16p

2008

Transportation Research Board 87th Annual Meeting

DVD

Figures; Maps; Photos; References (10) ; Tables (5)

Asphalt cement; Binders; Bituminous materials; Coarse aggregates; Gap graded aggregates; Heavy duty trucks; Hot mix asphalt; Roughness; Rutting; Stone matrix asphalt

Highways; Materials; I31: Bituminous Binders and Materials

Transportation Research Board Annual Meeting 2008 Paper #08-1613

PRP, TRIS, TRB

Jan 29 2008 3:57PM