Reclamation of oil sands fluid fine tailings (FFT) ponds is challenging due to the slow rate of natural consolidation of the suspended sediments generated during the extraction process. In order to reclaim tailings ponds, the shear strength of the sediments must first be increased to make the surface trafficable, at which point further reclamation work can be carried out on the surface of the ponds.
As base and precious metals and natural resources for energy are extracted, mining operators construct tailings dams above ground to hold the liquid or “slurried” waste generated from mining activities. Several high-profile dam failures, including Mount Polley in Canada, highlight the potential risks of tailings dams to human life and the environment. The proposed research is a concentrated effort to develop a practical tool to measure saturation of tailings in situ and to understand the field and lab performance of partly saturated tailings regarding cyclic and static liquefaction.
This project would address basic unanswered questions about how the application of environmentally benign process (i.e., biohydrometallurgy) on mine ores and tailings can leach and extract base and, precious that are essential for today’s “smarter” technologies. Bioprocessing methods for bio-extraction and bio-recovery of elements offer a new potential sustainable alternative compared to chemical conventional approaches.
Construction zones are one of the leading contributors to Toronto’s ever-growing congestion. The aim of this study is to develop an integrated construction zone traffic management framework to minimize disruption of the traffic and reduce the effect in terms of congestion. This study leverages historical and real data collected from on-board construction trucks provided by the partner organization to find an insight as to how far upstream and downstream of the work zone congestion propagates.
Construction projects always include incidents that may cause the labors injuries or even death. To mitigate the consequences of these incidents the labors are required to comply with a series safety advises and requirements that are forced by institutional guidelines. They are supposed to use personal protective equipment (PPE) such as hard hat and vest. However, sometimes correct usage of these equipment is neglected by the workers and construction managers and field engineers need to oversee them.
Permeable Reactive Barrier (PRB) is an in situ permeable treatment zone designed to capture and remediate a contaminant plume. PRBs have become important components among the various technologies available to remediate groundwater contamination and are now a standard in the remediation industry. Grafta®; an in-house patented technology provided by Comnipex is a novel material that has not been commercially applied within a PRB context.
The freight trucking industry is in a transformational phase by adopting smart mobility options to reduce operational costs and minimize carbon foot print. The autonomous truck platooning is a major step in this regard and the goal of this research project is to assess the readiness of the bridges for the peculiar loading conditions due this new form of the mobility by performing reliability analysis. The partner organization will benefit from the outcomes of this research by keeping its leading role in the smart mobility segment of the industry.
Over the years, numerous techniques and additives have been employed to increase soil strength and stability – from filling a bog with stones or other fill to compacting the soil with heavy machinery or mixing soil with cement or lime and allowing the resulting mix to harden. Duraflex Solutions Ltd has a new, environmentally-friendly product named DFI for stabilizing weak soils. DFI has worked well in Europe and is processed by simply mixing the top layer of the soil with the product and leaving the mix to harden.
The objective of the study is to develop an algorithm to streamline and automate the decision making process for implementing the municipal wastewater collection flushing program. Traditionally, a municipal flushing program, or pipe cleaning, is based on a time-cycle approach. This means that all sewer pipes in the network are treated the same, ignoring variables, such as the pipe physical attributes, site conditions, use and service are ignored. The driving paradigm for this project is to switch from a quantity-focused practice toward a quality-focused approach.
The structural health and performance of existing infrastructure in Canada has a large impact on the Canadian economy and hence, it is imperative that this infrastructure is kept in good operational conditions. A significant portion of this infrastructure was built during the post world war period, which suggests much of this infrastructure has surpassed their service life. Additionally, Canada’s extreme cold weather conditions give rise to adverse loading conditions such as freeze and thaw cycles, which further leads to damage and making this infrastructure more susceptible to failure.