Browsing Civil and Environmental Engineering by Title
Now showing items 238-257 of 881
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Direct Biofiltration and Nutrient (Phosphorus) Enhancement for Polymeric Ultrafiltration Membrane Fouling Control
(University of Waterloo, 2013-12-10)Membrane filtration is growing in popularity as a viable technology for drinking water treatment to meet high demand and regulatory requirements. While many improvements have been made to the technology in the past decade, ... -
Direct Biofiltration as a Pretreatment to Control Fouling in Ceramic Membranes in Drinking Water Treatment
(University of Waterloo, 2016-09-27)Ceramic membranes have been widely and successfully used in the food and beverage processing industry. Despite their success, ceramic membranes are not commonly employed in drinking water treatment due to their high initial ... -
Direct Method for Floor Response Spectra Considering Soil-Structure Interaction
(University of Waterloo, 2020-02-19)Soil-Structure Interaction (SSI) analysis is required in structural dynamic analysis under seismic excitations in the current standards, and it significantly influences the Floor Response Spectra (FRS),which are used in ... -
Direct Method of Generating Floor Response Spectra
(University of Waterloo, 2016-05-12)Floor Response Spectra (FRS), also called In-structure Response Spectra (IRS) in some standards and literature, are extensively used as seismic input in safety assessment for Systems, Structures, and Components (SSCs) in ... -
Direct Method of Generating Floor Response Spectra for Structures under Earthquake Excitations at Multiple Supports
(University of Waterloo, 2023-05-15)Floor Response Spectra (FRS) are commonly used as seismic input in the safety assessment for secondary systems in the nuclear power industry. Efficient and accurate determination of FRS is crucial in the design of nuclear ... -
Disinfection By-Product Formation in Drinking Water Treated with Chlorine Following UV Photolysis & UV/H<sub>2</sub>O<sub>2</sub>
(University of Waterloo, 2005)ABSTRACT As far back as the early 1900?s when it was discovered that water could be a mode of transmitting diseases, chlorine was used to disinfect water. In the 1970?s, the formation of disinfection by-products ... -
Dislocation Dynamics for High Strain-Rate Plasticity: Inertial and Thermal Effects
(University of Waterloo, 2017-07-26)There has been a trend of miniaturization in recent technological advances, particularly through the development of microelectromechanical systems (MEMS). To cope with the demand for increasing performance from ever smaller ... -
The Disposal of Mine Tailings Material
(University of Waterloo, 2014-04-29)The mining industry is an important component of the Canadian economy. The principal waste material from this industry is tailings. Numerous failures of tailings dams have caused loss of life and serious pollution ... -
Drinking Water Softening/Scale Prevention Technology Assessment and Performance of Template Assisted Crystallization
(University of Waterloo, 2019-06-18)Hard water typically has a hardness concentration over 120 mg/L CaCO3. Hardness is not a regulated drinking water parameter and does not have severe health effects. However, hard water causes more soap and detergent ... -
Drinking Water Treatment Technology Resilience for Management of Severely Deteriorated Water after Wildfire
(University of Waterloo, 2021-09-29)Severe wildland fire is occurring with increased frequency in many regions and can be potentially catastrophic for the provision of safe drinking water due to increasingly variable or deteriorated source quality. Deteriorated ... -
Dual Oxidant System for In Situ Treatment of Organic Contaminants
(University of Waterloo, 2017-05-01)Recently, the potential catalytic properties of manganese dioxide have attracted attention as a means to activate persulfate. This focus of this research was on the potential ability of MnO2(s) solids synthesized through ... -
The durability of concrete using concrete plant wash water
(University of Waterloo, 2007-06-18)Hundreds of ready-mix concrete trucks are dispatched daily from ready-mix concrete plants. On average, a concrete truck has a carrying capacity ranging from 7 to 9 cubic metres of concrete, requiring about 1500 litres of ... -
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 ...