There is an increasing level of confusion in the industry with regards to the proper identification, use and specification of Pneumatically Applied Concrete (PAC). Indeed, it appears that many job-sites may have, over the last few years, allowed the use of Low Velocity Sprayed Mortar (LVSM) in situations where it was not appropriate, and where shotcrete would have better met the technical requirements of the specifications. No technical documentation and information are available to demonstrate if LVSM is adequate for (structural) repair applications.
In this project, a pre-conditioning system to remove the oxygen prior to reaching a bioelectrode system sensor will be developed and tested. Bioelectrode system sensors require anoxic conditions for operation, and a low complexity solution would extend use cases of the technology. Bioelectrode system sensors measures the microbial activity of bacteria and the data can be used to optimize treatment efficiency, detect deleterious substances, and quantify Biological Oxygen Demand.
Autonomous data collection on construction sites has increasing potential to replace manual surveying methods, which are expensive, non-scalable, and potentially dangerous for the workers involved. In the proposed research the intern will work with industry partners Veerum and Clearpath Robotics to advance the technology which is needed to conduct autonomous data collection on large construction projects using mobile vehicles.
Arsenic (As) is a toxic metalloid that is widespread in the environment. Anthropogenic mining activities result in As being released from rock via mining activities in mine tailings, waste rock and process waters. AREVA has a proposed mine site expected to produce up to 6 million tonnes of waste rock containing As. This waste rock needs to be stored appropriately and the release of its As into groundwater must be limited to minimize environmental impacts.
This research addresses the feasibility of using FRP reinforcement in concrete beams taking into consideration the effect of fiber dosage and prestressing level in order to enhance the structural performance, time efficiency and optimised-cost. Full-scale precast concrete I-beams will be tested as simple beams to determine their flexural and shear capacity.
Micro-tunneling technique is a feasible means to construct pipelines and tunnels in different types of ground including Queenston shale. However, this shale exhibits time-dependent deformation behavior, generally known as the rock swelling, which produces additional stresses on underground structures. These stresses may exceed the allowable tensile or compressive strength of concrete of the pipeline or the tunnel liner, which in-turn may result in cracks in these structures.
Seismic response analysis are evaluations that aim to capture how the geological and geotechnical properties of soil deposits at a particular site affect earthquake motions at ground level. Commonly, this type of analysis is performed by assuming the soil layers are horizontal and that the earthquake motion travels in only one direction. However, in reality soil layers are heterogeneous and earthquake motions travel in three directions: two horizontals and one vertical. This combined effect is known as multidirectional loading.
Mines wastes include tailings and waste rock. Tailings are crushed rock produced by mineral extraction and waste rock is coarse material excavated to create mine openings. These wastes are commonly disposed on the surface in tailings or waste rock piles, which could pose serious environmental and geotechnical issues. Backfilling the openings of underground mines with wastes has become a common practice. The disposal of wastes in open pits is less common, yet is a promising technique.
Stormwater from urban areas has continuously contributed to degradation of stream health in Ontario, despite a number of measures being put in place for new developments. More recently, a Low Impact Development (LID) approach, aimed at controlling the rain runoff at the source, has been promoted and implemented. This project will focus on developing a novel approach for computer modelling of LID and legacy stormwater management practices to better inform the decision making and approval of such practices in new developments.
The proposed projects main objective is to solve the complex and very important problem currently being faced by almost all the infrastructure owners. At present the inspection is mostly confined to visual means, which is inadequate and also not reliable due to which, many inaccessible areas of an infrastructure could not be inspected. The solution to this problem lies in providing UAV based and other non-contact assessment techniques at a reduced cost.