Browsing Civil and Environmental Engineering by Title
Now showing items 246-265 of 866
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Early Flame Detection System Using Real-Time Machine-Vision and Image Analysis
(University of Waterloo, 2022-02-04)From 2010 to 2019, 110,811 fires with losses have been reported to the Office of Fire Marshall and Emergency Management in Ontario. In The USA, the local fire departments responded to 1,338,500 fires in 2020. These fires ... -
Economic and Energy Impacts of Adaptive Reuse Building Construction
(University of Waterloo, 2019-08-29)Adaptive reuse of buildings is an alternative to a building’s end-of-life where A building’s functional life may be extended to serve another purpose. Many studies suggest that adaptive reuse is more sustainable compared ... -
Economic Criticality of Ontario’s Highway Infrastructure
(University of Waterloo, 2017-05-02)Ontario is the economic center of Canada and hence generates a significant amount of freight activity. Moving forward, population growth coupled with growing and diverse trade strategies are likely to place new and increased ... -
Effect of Biofiltration on DBP Formation at Full-Scale and Pilot-Scale
(University of Waterloo, 2008-01-25)Over the past century chlorine has been a reliable disinfectant to reduce transmission of waterborne diseases in drinking water. Concerns about chlorination have increased since it was discovered in the 1970s that use of ... -
Effect of FRP Anchors on the FRP Rehabilitation of Shear Critical RC Beams and Flexure Critical RC Slabs
(University of Waterloo, 2013-02-22)The use of fiber-reinforced polymer (FRP) composites as a repair and strengthening material for reinforced concrete (RC) members has increased over the past twenty years. The tendency for FRP sheets to debond at loads below ... -
The effect of galvanized steel corrosion on the integrity of concrete
(University of Waterloo, 2008-01-16)The major concern regarding the use of hot-dip galvanized (HDG) steel as reinforcement in concrete has been the high rate of corrosion experienced by the zinc during the first hours in the fresh, wet, and highly alkaline ... -
Effect of Loading Frequency on Dynamic Properties of Soils Using Resonant Column
(University of Waterloo, 2012-02-21)Dynamic properties of soils (shear stiffness and damping ratio) are critical for the design of structures subjected to vibrations. The dynamic properties of a benchmark standardized laboratory sand (Ottawa silica sand) ... -
Effect of Post-Rolling Surface Condition on the Corrosion Performance of UNS 32205 Stainless Steel Rebar
(University of Waterloo, 2022-04-29)During the winter season, ice accumulation on roads and sidewalks is a major problem and poses a hazard to road users. The most common method of addressing this issue is by applying de-icing salts or spraying a brine ... -
Effect of Pre-treatment Using Ultrasound and Hydrogen Peroxide on Digestion of Waste Activated Sludge in an Anaerobic Membrane Bioreactor
(University of Waterloo, 2014-01-21)The rate of anaerobic digestion (AD) often depends on the rate-limiting hydrolysis step that makes organics available to microorganisms. To achieve efficient conversion of particulates to soluble materials and finally ... -
Effect of quality control parameter variations on the fatigue performance of aluminum friction stir welded joints
(Elsevier, 2019-01-01)This paper describes fatigue tests performed on 6061-T651 and 5083-H321 aluminum friction stir welded joints with dimensions and loading conditions typical for structural applications. Butt and lap joint details with various ... -
Effect of Reclaimed Asphalt Pavement on Ontario Hot Mix Asphalt Performance
(University of Waterloo, 2014-12-02)The use of Reclaimed Asphalt Pavement (RAP), sometimes called Recycled Asphalt Pavement, in Hot Mix Asphalt (HMA) provides many benefits and has been successfully used in Ontario for several years. The production and ... -
The Effect of Selected Coagulants on Chloride-to-Sulfate Mass Ratio for Lead Control and on Organics Removal in Two Source Waters
(University of Waterloo, 2009-01-22)Lead is a known toxin, with the ability to accumulate in the human body from as early as fetal development. Lead exposure is known to cause a myriad of health effects which are more prominent among children. Health effects ... -
The Effect of Solids Residence Time on Phosphorus Uptake in Co-precipitation Systems Targeting Low Phosphorus Concentrations
(University of Waterloo, 2015-04-07)Chemical phosphorus (P) removal is generally considered to be necessary when attempting to achieve ultra low P concentrations (i.e. < 50 μg/L) in wastewater treatment. However, the impact of aging of chemical solids (i.e. ... -
Effect of Thermal Pretreatment on Digestibility of Thickened Waste Activated Sludge and Primary Sludge in Two-stage Anaerobic Digestion
(University of Waterloo, 2015-12-15)This study investigated the effect of high pressure thermal (HPTH) pretreatment on the biodegradability of a mixture of primary sludge (PS) and thickened waste activated sludge (TWAS) in single-and two-stage continues ... -
Effect of Unbalanced Moment on Punching Shear Strength of Slab-Column Joints
(University of Waterloo, 2020-05-27)The design of reinforced concrete flat plate slab-column connections subjected to unbalanced moments varies greatly between national design codes. Specific to Canada and the United States (U.S.), assumptions relating to ... -
Effect of Woodpecker Damage and Wood Decay on Wood Utility Pole Strength
(University of Waterloo, 2011-04-28)In many regions of North America, Europe, and Australia, wood utility poles are used as main and secondary structural members for the support of electrical distribution and transmission lines. In the province of Ontario ... -
The Effect of Woodpecker Damage on the Reliability of Wood Utility Poles
(University of Waterloo, 2013-08-30)Hydro One, a major distribution of electricity in Ontario, has reported that approximately 16,000 of the wood utility poles in its network of two million poles have been damaged by woodpeckers. With a cost of replacement ... -
Effectiveness of Transit Signal Priority Strategies at Intersections with High Truck Volumes
(University of Waterloo, 2019-09-27)This thesis discusses the effectiveness of two Transit Signal Priority (TSP) strategies, Queue Jump Lane combined with Advanced Transit Signal (QJL-TS) and Green Extension (GE), at an isolated intersection during ... -
Effects of beam axial deformations on storey-based critical gravity loads in tension-only semi-braced steel frames
(Elsevier, 2021-04-01)If the beams in a structural frame are not connected to slabs or other rigid diaphragms, the beams will axially deform when the frame is subjected to lateral loads, reducing the critical loads and increasing local deflections ... -
Effects of column imperfections on capacity of steel frames in variable loading
(Journal of Constructional Steel Research, 2019-11-15)The presence of column initial imperfections in a steel frame can increase deflections and decrease its load carrying capacity. A method is proposed for evaluating the lateral stiffness, inter-storey displacement and ...