Lightweight Cellular Concrete to Mitigate Highway Settlement Over Organic Deposits - Highway 63:08 South of Fort McMurray, Alberta
Ken Froese, Renato Clementino, Brad Dolton, Roger Skirrow
In the proceedings of: GeoSaskatoon 2023: 76th Canadian Geotechnical ConferenceSession: Case Studies 1
ABSTRACT: A section of Highway 63 in northern Alberta constructed in 1975 experienced excessive long-term settlement due to consolidation of peat and organic layers which had not been removed. The combined thickness of these layers was up to 2.6 m. The area was remediated in 2021 by sub-excavating to place a 500 mm layer of lightweight cellular concrete (LCC) with a 400 mm clay cap below the pavement structure to reduce embankment loading and bridge the soft subgrade. Extensometers installed in the remediated zone show a significant reduction in the rate of consolidation of only 15 mm over two years. Thermistor strings determined that the LCC reduced frost penetration by 1 m and that the thickness of cover (clay cap and GBC) over the LCC was sufficient to reduce the risk of differential icing.
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Froese, Ken, Clementino, Renato, Dolton, Brad, Skirrow, Roger (2023) Lightweight Cellular Concrete to Mitigate Highway Settlement Over Organic Deposits - Highway 63:08 South of Fort McMurray, Alberta in GEO2023. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Froese_GEO2023_158,
author = {{Froese, Ken}, {Clementino, Renato}, {Dolton, Brad}, {Skirrow, Roger}}
title = {Lightweight Cellular Concrete to Mitigate Highway Settlement Over Organic Deposits - Highway 63:08 South of Fort McMurray, Alberta}
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {Lightweight Cellular Concrete to Mitigate Highway Settlement Over Organic Deposits - Highway 63:08 South of Fort McMurray, Alberta}
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }