10 YEARS OF CONCRETE PAVEMENT MAINTENANCE INNOVATION TO EXTEND SERVICE LIFE

摘要

The Highway 407 ETR concession in Ontario, Canada is responsible for the managementof a large highway network for a period of 99 years. As a part of that concession, 407 ETRmanages over 600 lane-kilometres of exposed concrete highway. 407 ETR has a veryactive pavement maintenance and preservation program to maximize the life of thepavement. Also, as a private sector concession, they have the ability to act quickly andactively partner with industry to promote innovation.407 ETR has a very active pavement management and maintenance management systemthat is used for future needs planning but more importantly is used to identify maintenanceand rehabilitation needs early in their development so that they can be addressed using aless expensive preventive maintenance program. It is in the best interest of theconcession to maximize the life of the pavement and to provide a very high quality ridingsurface for the paying public and to avoid disruptions to traffic flow and revenue. Toaccomplish this, 407 ETR has employed many maintenance techniques including: slabstitching, dowel bar retrofit, joint retrofit, diamond grinding, shot blasting, longitudinalgrooving, underslab sealing and lifting, targeted slab replacement, micro-surfacing andother proprietary thin asphalt surfaces.This paper reviews each of the concrete pavement maintenance and repair techniquesused by 407 ETR over the past 10 years, discusses their performance and providesguidance on “what to do and what not to do” aspects of their use and compares their lifecyclebenefits.