Abstract Manager

This paper will provide a case study on a concrete pavement constructed in 2023 on Highway 3 in the Windsor Essex area of Ontario. Project details will be provided on this Design Build project in the background portion of the report. This will be followed by discussions on MTOs new concrete durability requirements to improve the performance of concrete pavement including concrete strength, air voids, rapid chloride permeability (RCP), increased slag content in the mix design and new single saw cut for transverse joints. Next the paper will discuss the specifications smoothness requirements and provide actual values obtained by the contractor through diamond grinding the concrete surface. The paper will then discuss pavement noise looking at the noise level of the newly specified longitudinally grooved concrete textures compared to two asphalt control sections (SuperPave 12.5 FC 2 and SMA 12.5) and other concrete texture types. Discussion will also occur on safety and how the new aggregate requirement for 60% acid insoluble residue will improve long-term skid resistance of the concrete pavement. Finally, the paper will look at the sustainability of concrete pavement including the actual CO2 footprint of the placed concrete compared to the Ontario industry average baseline global warming potential for a 35 MPa concrete mix with air. Other sustainable benefits of using concrete pavement such as improved fuel consumption, improved light reflectance and reduced heat island effect will also be briefly discussed.