Utilization of Treated Oil Sand Waste in Cementitious Materials for Sustainable Geotechnical Applications

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4. Utilization of Treated Oil Sand Waste in Cementitious Materials for Sustainable Geotechnical Applications

Oil sand drill cuttings waste is a major challenge for the oil sand mining sector. Thermo-Mechanical Cuttings Cleaner (TCC) is a new technology that separates water and oil from the solid waste. The remaining part of the tailing is fine particles of mainly quartz crystals, which is referred herein as Treated Oil Sand Waste (TOSW).  The present work offers innovative utilization of TOSW in cementitious materials for sustainable geotechnical applications. The physical, chemical and mineralogical characteristics of the treated oil TOSW as well as fresh and hardened properties for grouts, concrete and controlled low strength material (CLSM) incorporating the TOSW were evaluated. The results demonstrated that TOSW can partially replace cement or sand, and fully replace fly ash in the considered applications. For example, grout used for constructing micropiles was manufactured utilizing TOSW as partial replacement of cement. In addition, TOSW partially replaced natural sand in concrete mixture used for piles, and fully replaced fly ash in the manufacture of controlled low strength material (CLSM) to improve its important fresh properties such as flowability. The results of the study demonstrated that grout and concrete mixtures incorporating TOSW meet all the performance and environmental requirements of these applications.

9th International Congress on Environmental Geotechnics (ICEG2023)

Characterisation, Remediation and Management of Contaminated Sites and Wastes