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Articles 6301 - 6330 of 52423
Full-Text Articles in Entire DC Network
Performance Of Engineered Turf Cover System Under Extreme Weather Conditions, Thomas Orzech, Bryan Scholl, Bradford Cooley, Ming Zhu
Performance Of Engineered Turf Cover System Under Extreme Weather Conditions, Thomas Orzech, Bryan Scholl, Bradford Cooley, Ming Zhu
World of Coal Ash Proceedings
Performance of Engineered Turf Cover System Under Extreme Weather Conditions Authors Mr. Thomas Orzech - United States - Watershed Geo Dr. Bryan Scholl - United States - Watershed Geo Mr. Bradford Cooley - United States - Watershed Geo Dr. Ming Zhu - United States - Watershed Geo Abstract The engineered turf final closure system (ClosureTurf®) is installed or awaiting installation on over 4,000 acres of waste containment facilities including coal combustion residual (CCR) units and industrial and municipal solid waste landfills. A significant benefit of the engineered turf cover system over traditional soil covers is performance and resiliency under extreme …
Producing Lightweight Aggregate From Waste Coal Ash For The Construction Industry, Mo Balapour
Producing Lightweight Aggregate From Waste Coal Ash For The Construction Industry, Mo Balapour
World of Coal Ash Proceedings
A technology platform to recycle off-spec coal combustion products into construction lightweight aggregate Authors Dr. Mo Balapour - United States - SusMaX Inc. Abstract As the focus shifts towards legacy coal ash landfills for benefaction processes to supply fly ash to the concrete market, it’s important to note that not all landfills and ponds have the suitable material for such recycling. SusMaX offers a new technology platform that can recycle landfilled or ponded off-spec coal ash products such as fly ash, bottom ash, slag, or their mixture into safe-to-use “construction lightweight aggregate”. This engineered lightweight aggregate has superior engineering performance …
Perimeter Barrier Wall Installation To Facilitate Closure By Removal, Paul Schmall, Shawn Coughlin, Christopher Gee
Perimeter Barrier Wall Installation To Facilitate Closure By Removal, Paul Schmall, Shawn Coughlin, Christopher Gee
World of Coal Ash Proceedings
Case Study: Perimeter Barrier Wall Installation to Facilitate Closure by Removal Authors Dr. Paul Schmall - United States - Keller Mr. Shawn Coughlin - United States - Keller Mr. Christopher Gee - United States - Dominion Abstract Hydrogeologic conditions of this project require a multi-faceted approach to facilitate ash dewatering and deep depressurization of underlying highly permeable soils within a 5,700 ft long perimeter cutoff wall, as deep as 80 feet. A perimeter cutoff wall was required because significant and sustained groundwater inflows from beneath the ponded ash were experienced with previous construction at the pond because the pond was …
Tva Shawnee – Overcoming Engineering Challenges Associated With Closure In Place Of Mixed, Craig Lee, Michael Owens
Tva Shawnee – Overcoming Engineering Challenges Associated With Closure In Place Of Mixed, Craig Lee, Michael Owens
World of Coal Ash Proceedings
TVA Shawnee – Overcoming Engineering Challenges Associated with Closure In Place of Mixed Ash Authors Mr. Craig Lee - United States - Kiewit Engineering Group, Inc. Mr. Michael Owens - United States - Kiewit Engineering Group, Inc. Abstract ABSTRACT The Tennessee Valley Authority (TVA) is in the process of closing Ash Pond 2, the Stilling Pond and the Special Waste Landfill at the TVA Shawnee Fossil Plant using Closure In Place. The project includes four million cubic yards of mass grading that included embanking material over sluiced ash. Kiewit Engineering Group (KEG) designed a bridge lift that utilized existing ash …
Paper_Emerging Technologies For Water Conveyance And Containment, Nathan Ivy
Paper_Emerging Technologies For Water Conveyance And Containment, Nathan Ivy
World of Coal Ash Proceedings
Emerging technologies for water conveyance and containment Authors Mr. Nathan Ivy - United States - Concrete Canvas Abstract GCCM’s represent the newest class of geosynthetics that can be used for water conveyance and containment applications. Since their initial introduction nearly 15 years ago, ASTM D8364-Standard Specification for Geosynthetic Cementitious Composite Mats (GCCM) Materials has been developed as the internationally recognized standard for testing and classifying GCCM as Type I, II or III. All products discussed herein meet or exceed all aspects of this standard – regardless of type. These products combine both a concrete – hard armor – top surface …
Demonstrating Equivalency Of Closureturf, Tyler Schmidt
Demonstrating Equivalency Of Closureturf, Tyler Schmidt
World of Coal Ash Proceedings
DEMONSTRATING EQUIVALENCY OF CLOSURETURF AS A VIABLE ALTERNATIVE TO TRADITIONAL CCR FINAL COVER SYSTEMS Authors Mr. Tyler Schmidt - United States - Burns & McDonnell Abstract When designing final cover systems for the closure of CCR units, owners must select materials that meet regulatory criteria while weighing facility-specific needs and challenges. ClosureTurf, an artificial turf cover system component, is often a viable solution for managing a facility’s needs and challenges, from preconstruction (such as optimizing earthwork) to post-closure (such as managing a low-maintenance artificial erosion layer). However, obtaining approval from a state agency or to comply with the requirements in …
Groundwater Model Workflow For Ccr Sites, William Gottobrio, Cliff Baines, Roselyne Laboso, Skyler Sorsby
Groundwater Model Workflow For Ccr Sites, William Gottobrio, Cliff Baines, Roselyne Laboso, Skyler Sorsby
World of Coal Ash Proceedings
Groundwater Model Workflow for CCR Sites Authors Mr. William Gottobrio - United States - WSP USA Inc Mr. Cliff Baines - United States - WSP USA Inc Ms. Roselyne Laboso - United States - WSP USA Inc Mr. Skyler Sorsby - United States - WSP USA Inc Abstract Changes in legislation and legal requirements have added additional regulatory scrutiny to groundwater flow models for Coal Combustion Residuals (CCR) sites. The additional scrutiny of these projects emphasizes the importance of a model development framework that is both well-defined and defensible. WSP has developed a workflow for creating groundwater models that can …
Lessons Learned Through The Implementation Of In-Situ Stabilization For The Closure Of A Coal Combustion Residue Site, Vincent Spillane, Michael Fisher, Darin Payne
Lessons Learned Through The Implementation Of In-Situ Stabilization For The Closure Of A Coal Combustion Residue Site, Vincent Spillane, Michael Fisher, Darin Payne
World of Coal Ash Proceedings
Lessons Learned Through the Implementation of In-Situ Stabilization for the Closure of a Coal Combustion Residue Site Authors Mr. Vincent Spillane - United States - Geo-Solutions, Inc. Mr. Michael Fisher - United States - Geo-Solutions, Inc. Mr. Darin Payne - United States - Geo-Solutions, Inc. Abstract The traditional means of dealing with coal combustion residual (CCR) materials include excavation and off-site disposal. This approach can be impacted by site-specific geotechnical and hydrological features which dramatically increase cost and complexity. In many cases, it makes sense to consider a way to keep the material on site, for example using in-situ stabilization/solidification …
Securing Stockpile Reserves Of Coal Derived Fly Ash As A National Asset, Nigel Cooke
Securing Stockpile Reserves Of Coal Derived Fly Ash As A National Asset, Nigel Cooke
World of Coal Ash Proceedings
Soliciting Support from UK Government to Safeguard Legacy Stockpiles of Coal Derived Fly Ash (CDFA) Authors Dr. Nigel Cooke - United Kingdom - UK Quality Ash Association Abstract The global environment is under the spotlight and the need to reduce greenhouse gases is having a profound impact on just about every industrial sector. The construction industry is no exception. Coal derived fly ash (CDFA), has long been accepted within the UK construction sector for the unique properties it imparts to concrete and mortars and as a secondary aggregate for use in autoclaved aerated block manufacture and grouts. With a goal …
Dewatering Basics – Understanding The Challenges Of Dewatering, Christine Harris
Dewatering Basics – Understanding The Challenges Of Dewatering, Christine Harris
World of Coal Ash Proceedings
Dewatering Basics – Understanding the challenges of dewatering Authors Mrs. Christine Harris - United States - None Abstract The current EPA Coal Combustion Residuals Rule requires the removal of Free Liquids from coal ash. Free liquids are defined as all ‘‘liquids that readily separate from the solid portion of a waste under ambient temperature and pressure,’ regardless of whether the source of the liquids is from sluiced water or groundwater. 40 CFR 257.53. Consequently, the directive applies to both the freestanding liquid in the impoundment and to all separable porewater in the impoundment, whether the porewater was derived from sluiced …
Paper_Capping & Closure For Two Pennsylvania Landfills Subject To U.S. Epa’S Ccr Rule Promulgated Under 40 Cfr 257 Subpart D, Ron Harris, Cory White, John Klamut
Paper_Capping & Closure For Two Pennsylvania Landfills Subject To U.S. Epa’S Ccr Rule Promulgated Under 40 Cfr 257 Subpart D, Ron Harris, Cory White, John Klamut
World of Coal Ash Proceedings
This project consisted of capping two coal combustion residuals (CCR) landfills with geosynthetic capping systems consisting of 24-inches of final cover soil over eight ounce per square yard filter/separation geotextile over Super Gripnet geomembrane with drainage studs along top and friction spikes along the bottom over a prepared subgrade consisting of in-place cover soil. Approximately 20 acres were capped at each landfill in 2023. Closure plans addressing CCR Rule requirements were prepared and posted to the stations’ CCR Rule websites. Per those plans, the stations intend to cease coal combustion and residual waste disposal by year-end 2028. To comply with …
Paper_Lessons Learned Through The Implementation Of In-Situ Stabilization For The Closure Of A Coal Combustion Residue Site, Vincent Spillane, Michael Fisher, Darin Payne
Paper_Lessons Learned Through The Implementation Of In-Situ Stabilization For The Closure Of A Coal Combustion Residue Site, Vincent Spillane, Michael Fisher, Darin Payne
World of Coal Ash Proceedings
Traditional means of remediating coal combustion residual (CCR) materials include excavation and off-site disposal. Site-specific geotechnical and hydrological features can dramatically increase the cost and complexity of remediation efforts. As such, it is often advisable to explore ways to properly leave material on-site. One such way may be via in-situ stabilization/solidification (ISS). ISS is a technically sound and economical solution for remediating CCR and other wastes and was recently used as part of the in- place closure of a 2.25-acre ash pond. In the project scenario described herein, the Contractor evaluated multiple means of ash stabilization through the use of …
Paper_Uniaxial Compressive Behavior Of “Solidified” Synthetic Lightweight Aggregates, Annika Han, Christopher Swan
Paper_Uniaxial Compressive Behavior Of “Solidified” Synthetic Lightweight Aggregates, Annika Han, Christopher Swan
World of Coal Ash Proceedings
This paper presents results from uniaxial compression tests on a synthetic lightweight aggregate (SLA) created from high carbon fly ash and mixed waste plastics. Since their invention in the late 1990’s, SLA has represented an innovative and potentially novel construction material created solely from the co-extrusion of these two, high volume, waste streams. This current effort involved testing specimens created as “solidified” SLA cylinders. Three types of cylindrical specimen were created from ‘loose’ SLA that existed at the following grain-size ranges: Coarse (between U.S. sieve No. 4 and No. 8 or between 2.36 to 4.75mm), Medium (between No. 8 and …
Uniaxial Compressive Behavior Of “Solidified” Synthetic Lightweight Aggregates, Annika Han, Chris Swan
Uniaxial Compressive Behavior Of “Solidified” Synthetic Lightweight Aggregates, Annika Han, Chris Swan
World of Coal Ash Proceedings
Uniaxial Compressive Behavior of “Solidified” Synthetic Lightweight Aggregates Authors Ms. Annika Han - United States - GEI Consultants, Inc. Prof. Chris Swan - United States - Tufts University Abstract This paper presents results from uniaxial compression tests on a synthetic lightweight aggregate (SLA) created from high carbon fly ash and mixed waste plastics. Since their invention in the late 1990’s, SLA has represented an innovative and potentially novel construction material created solely from the co-extrusion of these two, high volume, waste streams. This current effort involved testing specimens created as “solidified” SLA cylinders. Three types of cylindrical specimen were created …
Next-Generation High-Resolution Methods For Site Characterization, Pj Nolan, Cole Mayer, Dawn Prell, Rens Verburg
Next-Generation High-Resolution Methods For Site Characterization, Pj Nolan, Cole Mayer, Dawn Prell, Rens Verburg
World of Coal Ash Proceedings
Next-Generation High-Resolution Methods for Site Characterization Authors Dr. PJ Nolan - United States - WSP USA Mr. Cole Mayer - United States - WSP USA Ms. Dawn Prell - United States - WSP USA Dr. Rens Verburg - United States - WSP USA Abstract The requirements from regulatory agencies and other stakeholders to provide more robust site characterization when entering remedial action or developing alternative source demonstrations (ASDs) at Coal Combustion Product (CCP) sites have increased in recent years. In many cases, the current mainstream site characterization methods used for these efforts fail to meet those requirements. Here, we demonstrate …
Age-Related Brain Atrophy And The Positive Effects Of Behavioral Enrichment In Middle-Aged Beagles., Jessica A Noche, Hamsanandini Radhakrishnan, Margo F. Ubele, Kathy Boaz, Jennifer L Mefford, Erin D Jones, Hollie Y Van Rooyen, Jessica A Perpich, Katie Mccarty, Beverly Meacham, Jeffrey R. Smiley, Stasia A Bembenek Bailey, László G Puskás, David K. Powell, Lorena Sordo, Michael J Phelan, Christopher M. Norris, Elizabeth Head, Craig E L Stark
Age-Related Brain Atrophy And The Positive Effects Of Behavioral Enrichment In Middle-Aged Beagles., Jessica A Noche, Hamsanandini Radhakrishnan, Margo F. Ubele, Kathy Boaz, Jennifer L Mefford, Erin D Jones, Hollie Y Van Rooyen, Jessica A Perpich, Katie Mccarty, Beverly Meacham, Jeffrey R. Smiley, Stasia A Bembenek Bailey, László G Puskás, David K. Powell, Lorena Sordo, Michael J Phelan, Christopher M. Norris, Elizabeth Head, Craig E L Stark
Neuroscience Faculty Publications
Aging dogs serve as a valuable preclinical model for Alzheimer's disease (AD) due to their natural age-related development of β-amyloid (Aβ) plaques, human-like metabolism, and large brains that are ideal for studying structural brain aging trajectories from serial neuroimaging. Here we examined the effects of chronic treatment with the calcineurin inhibitor (CNI) tacrolimus or the nuclear factor of activated T cells (NFAT)-inhibiting compound Q134R on age-related canine brain atrophy from a longitudinal study in middle-aged beagles (36 females, 7 males) undergoing behavioral enrichment. Annual MRI was analyzed using modern, automated techniques for region-of-interest-based and voxel-based volumetric assessments. We found that …
Agricultural Gypsum For Improved Production And Soil Carbon Capture, Brian Gardener, Roland Wilhelm
Agricultural Gypsum For Improved Production And Soil Carbon Capture, Brian Gardener, Roland Wilhelm
World of Coal Ash Proceedings
Agricultural Gypsum for Improved Production and Soil Carbon Capture Authors Dr. Brian Gardener - United States - Ag Spectrum Company Dr. Roland Wilhelm - United States - Purdue University Department of Agronomy Abstract When applied as spreadable powder, gypsum can improve agricultural soil quality and fertility in multiple ways. At low rates, it supplies essential calcium and sulfate to crop plants. At high rates, it can remediate soils plagued by sodicity or aluminum toxicity. However, gypsum has its greatest value to the large majority of farmers at intermediate rates of 500 to 2000 lbs. per acre per year. At such …
New Applications For Beneficial Reuse Of Coal Combustion Ash, Anne Oberlink, Tom Robl, Bob Jewell
New Applications For Beneficial Reuse Of Coal Combustion Ash, Anne Oberlink, Tom Robl, Bob Jewell
World of Coal Ash Proceedings
New Applications for Beneficial Reuse of Coal Combustion Ash Authors Ms. Anne Oberlink - United States - University of Kentucky Center for Applied Energy Research Dr. Bob Jewell - United States - University of Kentucky Center for Applied Energy Research Dr. Thomas Robl - United States - University of Kentucky Center for Applied Energy Research Mr. Curtis Wilie - United States - Commonwealth Energy Technologies Mr. Jim Crenshaw - United States - Commonwealth Energy Technologies Mr. Scott Hoskins - United States - Commonwealth Energy Technologies Ms. Hailey Mattingly - United States - Office of Energy Policy, Commonwealth of Kentucky Abstract …
Application Of Carbon Nanotube Technology To Fly-Ash Based Geopolymer Concrete For Strength Development And Net-Zeros Aspect, Janell Prater, Young Hoon Kim
Application Of Carbon Nanotube Technology To Fly-Ash Based Geopolymer Concrete For Strength Development And Net-Zeros Aspect, Janell Prater, Young Hoon Kim
World of Coal Ash Proceedings
Application of carbon nanotube technology to fly-ash based geopolymer concrete for strength development and net-zeros aspect Authors Ms. Janell Prater - United States - University of Louisville Dr. Young Hoon Kim - United States - University of Louisville Abstract Fly ash is one of the viable options to reduce carbon emissions in the construction industry. As the construction industry is expected to consume 10% of the world's fresh water, water-conscious building materials is an essential technological development to lessen the impact of infrastructure on water security. Geopolymer concrete can be a solution to the construction industry in water-stressed regions. Geopolymerization …
Assessment Of Coal Fly Ash As A Thermal Energy Storage Material For Concentrating Solar Power, Megan Bellusci, Kiana Oos, Deborah Glosser, Drew Johnson
Assessment Of Coal Fly Ash As A Thermal Energy Storage Material For Concentrating Solar Power, Megan Bellusci, Kiana Oos, Deborah Glosser, Drew Johnson
World of Coal Ash Proceedings
Use of Unconventional Fly Ash as Sensible Particulate Thermal Energy Storage Materials for Concentrating Solar Power Authors Ms. Megan Bellusci - United States - Western Washington University Ms. Kiana Oos - United States - Western Washington University Dr. Deborah Glosser - United States - Western Washington University Mr. Drew Johnson - United States - Western Washington University Dr. Prannoy Suraneni - United States - University of Miami Abstract Coal fly ash is an attractive alternative to sintered bauxite proppants for sensible thermal energy storage (TES) in high-temperature (HT) direct absorbing receiver concentrating solar power (CSP) technology. These waste materials are …
Bioengineering Of A Plant System To Remove Arsenic And Cadmium And Sustainably Harvest Rare Earth Elements (Rees) From Industrial Byproducts, Edmaritz Hernandez Pagan, Colleen Doherty, Michael Kudenov
Bioengineering Of A Plant System To Remove Arsenic And Cadmium And Sustainably Harvest Rare Earth Elements (Rees) From Industrial Byproducts, Edmaritz Hernandez Pagan, Colleen Doherty, Michael Kudenov
World of Coal Ash Proceedings
Bioengineering of a Plant System to Remove Arsenic and Cadmium and Sustainably Harvest Rare Earth Elements (REEs) from Fly Ash. Authors Ms. Edmaritz Hernandez Pagan - United States - North Carolina State University Dr. Colleen Doherty - United States - North Carolina State University Dr. Michael Kudenov - United States - North Carolina State University Dr. Kanjana Laosuntisuk - United States - North Carolina State University Abstract Fly ash is a fine powder-like residue from coal combustion. It can be utilized for industrial applications like concrete production or disposed of in landfills. Many regulations are involved in the use and …
Example Application Of A Holistic Decision Support Tool Used For Selecting Corrective Actions At Coal Combustion Product Sites, Ari Lewis, John Kondziolka, Matt Biega, Egidio Tentori
Example Application Of A Holistic Decision Support Tool Used For Selecting Corrective Actions At Coal Combustion Product Sites, Ari Lewis, John Kondziolka, Matt Biega, Egidio Tentori
World of Coal Ash Proceedings
Example Application of a Holistic Decision Support Tool Used for Selecting Corrective Actions at Coal Combustion Product Sites Authors Ms. Ari Lewis - United States - Gradient Mr. John Kondziolka - United States - Gradient Mr. Matt Biega - United States - Gradient Dr. Egidio Tentori - United States - Gradient Dr. Qian Zhang - United States - Gradient Dr. Ishita Shrivastava - United States - Gradient Mr. Bruce Hensel - United States - Electric Power Research Institute Abstract Gradient developed a holistic decision support tool (HDST) for EPRI to support corrective action alternative assessments at coal combustion product (CCP) …
Fly Ash And Lime Stabilization Of Sewage Sludge- Changes To Phosphorous Solubility And Bioavailability, Yaniv Freiberg, Shahar Baram, Michael Borisover, Pinchas Fine
Fly Ash And Lime Stabilization Of Sewage Sludge- Changes To Phosphorous Solubility And Bioavailability, Yaniv Freiberg, Shahar Baram, Michael Borisover, Pinchas Fine
World of Coal Ash Proceedings
Fly Ash and Lime Stabilization of Sewage Sludge: Changes to Phosphorous Solubility and Bioavailability Authors Dr. Yaniv Freiberg - United States - University of Illinois at Urbana-Champaign Dr. Shahar Baram - Israel - Institute of Soil, Water, and Environmental Sciences, Volcani Center Dr. Michael Borisover - Israel - Institute of Soil, Water, and Environmental Sciences, Volcani Center Dr. Pinchas Fine - Israel - Institute of Soil, Water, and Environmental Sciences, Volcani Center Abstract Biosolids application to agricultural soils offers an alternative source of essential macro and micro plant nutrients that replace industrial products. In addition, the alkaline treatment of sludge …
How Sampling Methods Affect The Interpretation Of Groundwater Microbial Communities, Ann Ojeda, Natalia Malina, Elyssa Rivera, Shifat Monami
How Sampling Methods Affect The Interpretation Of Groundwater Microbial Communities, Ann Ojeda, Natalia Malina, Elyssa Rivera, Shifat Monami
World of Coal Ash Proceedings
How sampling methods affect the interpretation of groundwater microbial communities Authors Dr. Ann Ojeda - United States - Auburn University Dr. Natalia Malina - United States - Auburn University Ms. Elyssa Rivera - United States - Auburn University Ms. Shifat Monami - United States - Auburn University Dr. Laura Bilenker - United States - Auburn University Dr. Ming-Kuo Lee - United States - Auburn University Abstract The basis of bioremediation in a groundwater setting is to activate biogeochemical processes that impact the behavior of compounds or elements of interest. For example, biogeochemical processes can stimulate element sequestration in a solid …
Relationship Of Energy And The Effect On Coal Combustion Residual (Ccr) Behavior, Tyler Hitt, Harvey Upchurch, Will Rex
Relationship Of Energy And The Effect On Coal Combustion Residual (Ccr) Behavior, Tyler Hitt, Harvey Upchurch, Will Rex
World of Coal Ash Proceedings
Relationship of Energy and the Effect on Coal Combustion Residual (CCR) Behavior: A Study of Moisture-Density Relationships Authors Mr. Tyler Hitt - United States - TTL, Inc. Mr. Harvey Upchurch - United States - TTL, Inc. Mr. Will Rex - United States - TTL, Inc. Abstract The determination of maximum dry density and optimum moisture content using a standard compactive energy for soils is defined in ASTM D698. Coal combustion residuals (CCR) are commonly utilized for beneficial re-use material such as replacement of structural fill, incorporation into structural concrete mixes or placed into permanent closure in an approved facility. Utilizing …
Remote Characterization Of Impounded Ash To Identify Economic Harvesting Opportunities, Krish Mehta, Manju Murugesu
Remote Characterization Of Impounded Ash To Identify Economic Harvesting Opportunities, Krish Mehta, Manju Murugesu
World of Coal Ash Proceedings
Remote characterization of impounded ash Authors Mr. Krish Mehta - United States - Stanford Dr. Manju Murugesu - United States - Stanford Abstract The gradual shutdown of coal power plants has led to a decrease in ash production, prompting an increased interest in harvesting ash from landfills for use as a Supplementary Cementitious Material (SCM) in concrete. The viability and cost-effectiveness of this hinge on various factors, including the location, scale, and chemical composition of the ash impoundments. Key determinants such as carbon content (Loss on Ignition, LOI), the presence of Flue-Gas Desulfurization (FGD) waste (e.g., gypsum), moisture levels, and …
Swell Compression Testing On Kaolinite Gypsum Systems, Kelden Andrews, Tom Robl, Tristana Duvallet, Bob Jewell
Swell Compression Testing On Kaolinite Gypsum Systems, Kelden Andrews, Tom Robl, Tristana Duvallet, Bob Jewell
World of Coal Ash Proceedings
Swell compression testing on Kaolinite Gypsum Systems Authors Mr. Kelden Andrews - United States - University of Kentucky Center for Applied Energy Research Dr. Thomas Robl - United States - University of Kentucky Center for Applied Energy Research Dr. Tristana Duvallet - United States - University of Kentucky Center for Applied Energy Research Dr. Bob Jewell - United States - University of Kentucky Center for Applied Energy Research Mr. Ewen Floch - France - Polytech Dijon Abstract The understanding of soil swell mechanics and mechanisms is critical to both the treatment of soils for stability as well as site selection …
Understanding The Impact Of Fly Ash Particle Size On Reactivity And Strength Development, Mahmod Yahya, Lisa Burris
Understanding The Impact Of Fly Ash Particle Size On Reactivity And Strength Development, Mahmod Yahya, Lisa Burris
World of Coal Ash Proceedings
Understanding the Impact of Fly Ash Particle Size on Reactivity and Strength Development Authors Mr. Mahmod Yahya - United States - The Ohio State University Dr. Lisa Burris - United States - The Ohio State University Abstract In the quest for sustainable and efficient construction materials, the role of industrial by-products like fly ash in concrete enhancement has garnered substantial attention. With decreasing coal power production, supplies of virgin ash are declining, and harvested ashes are being increasingly utilized. But harvested ash sources often exceed ASTM C618 fineness limits, having greater quantities of coarse materials, and so currently require significant …
Paper_Functionality Of Coal Fly Ash In Mortars After Rare Earth Element Recovery, Rahima Tufail, Sai Praneeth, Sarah Brownlee, Timothy Dittrich
Paper_Functionality Of Coal Fly Ash In Mortars After Rare Earth Element Recovery, Rahima Tufail, Sai Praneeth, Sarah Brownlee, Timothy Dittrich
World of Coal Ash Proceedings
Rare earth elements (REEs) are a set of 17 elements (lanthanides plus scandium and yttrium) that are not found concentrated in large ore deposits in nature. There has been huge growth in the amount of technology that uses REEs due to their diverse properties, but REEs are difficult to mine and expensive to separate. The global supply of REEs is largely controlled by a single country (China; >95%), and the lack of a domestic supply has been identified as a vulnerability to U.S. economic security. To alleviate this vulnerability, economical extraction methods from traditionally overlooked domestic feedstocks, such coal fly …
Fly Ash-Based Geopolymer: Water, Curing Temperature, And Cao Content Effects On Microstructure And Compressive Strength, Lujain Salem, Young Hoon Kim
Fly Ash-Based Geopolymer: Water, Curing Temperature, And Cao Content Effects On Microstructure And Compressive Strength, Lujain Salem, Young Hoon Kim
World of Coal Ash Proceedings
Fly Ash-based Geopolymer: Water, Curing Temperature, and CaO Content Effects on Microstructure and Compressive Strength Salem, Lujain and Young Hoon Kim Civil and Environmental Engineering, University of Louisville, Louisville, KY 40208 KEYWORDS: High-calcium oxide Content, Geopolymer, microstructure, water content, curing temperature ABSTRACT Geopolymer, an emerging alternative to Portland cement-based concrete, relies on alumina and silica-rich precursors like fly ash for its formation. Geopolymerization is a chemical process that creates a three-dimensional polymer network by reacting with an alkaline activator. While fly ash's calcium oxide (CaO) content is crucial in its classification, it behaves differently in geopolymerization, where it competes with …