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Articles 1 - 30 of 232
Full-Text Articles in Engineering
Micro-Mechanical Analysis Of Corrosion Products Formed During Long-Term Carbonation Induced Corrosion Of Steel, Marijana Serdar, Dubravka Bjegovic, Valérie L’Hostis, Stéphane Poyet, Damien Féron
Micro-Mechanical Analysis Of Corrosion Products Formed During Long-Term Carbonation Induced Corrosion Of Steel, Marijana Serdar, Dubravka Bjegovic, Valérie L’Hostis, Stéphane Poyet, Damien Féron
International Conference on Durability of Concrete Structures
During corrosion distinct types of corrosion products form, composed of different ratios of ferrous ions and oxide, hydroxides. Corrosion products have different physical and mechanical properties, mainly density, resistivity, volume and modulus of elasticity compared to iron. Knowing properties of corrosion products is indispensable for service life modelling of structures and can give valuable insight into the long-term corrosion propagation process. In this study micro-indentation method was used to evaluate mechanical properties of different layers formed during long-term carbonation induced corrosion of steel in concrete. Investigation was performed on three sets of reinforced concrete samples, that underwent corrosion during 50, …
Development Of Engineered Cementitious Composites With Conductive Inclusions For Use In Self-Sensing Applications, Benny Suryanto Dr, Danah Saraireh Ms, Steven Walls Mr, Jaehwan Kim Dr, W John Mccarter Prof
Development Of Engineered Cementitious Composites With Conductive Inclusions For Use In Self-Sensing Applications, Benny Suryanto Dr, Danah Saraireh Ms, Steven Walls Mr, Jaehwan Kim Dr, W John Mccarter Prof
International Conference on Durability of Concrete Structures
The mechanical and a.c. electrical properties of a new varietal of engineered cementitious composite (ECC) incorporating conductive inclusions are presented. Electrical measurements were undertaken over a wide frequency range while curing and when under uniaxial tensile loading to study the influence of ongoing hydration and multiple microcrack formation on the composite electrical impedance. When presented in Nyquist format, the work shows that conductive inclusions reduce the bulk resistance of the composite while enhancing its polarizability, transforming the classic, single-arc bulk response of typical cement-based materials to a two-arc response. The bulk resistance was shown to increase with time and damage, …
Experimental And Numerical Investigation On The Irregularity Of Carbonation Depth Of Concrete Under Supercritical Condition, Hao Bao Masc, Min Yu Dr., Jianqiao Ye Dr., Lihua Xu Dr., Yin Chi Dr., J Ye
Experimental And Numerical Investigation On The Irregularity Of Carbonation Depth Of Concrete Under Supercritical Condition, Hao Bao Masc, Min Yu Dr., Jianqiao Ye Dr., Lihua Xu Dr., Yin Chi Dr., J Ye
International Conference on Durability of Concrete Structures
The heterogeneity of a cement-based material results in a random spatial distribution of carbonation depth, which may significantly affect the mechanical properties and durability of the material. Currently, there is a lack of both experimental and numerical investigations aiming at a statistical understanding of this important phenomenon. This paper presents both experimental and numerical supercritical carbonation test results of concrete blocks. The random fields of porosity and two-dimension random aggregate model of concrete were proposed for the simulation. The carbonation depths are measured and distributed along the carbonation boundary by the proposed rapid image processing technique, which are then statistically …
Guiding Principles In Developing The South African Approach To Durability Index Testing Of Concrete, Yunus Ballim, Mark Alexander
Guiding Principles In Developing The South African Approach To Durability Index Testing Of Concrete, Yunus Ballim, Mark Alexander
International Conference on Durability of Concrete Structures
Focused thinking on the possibility of early-age testing of concrete for long-term durability started in earnest during the late 1980’s in South Africa. Through sustained research, development and trial implementation on construction projects, three durability index (DI) tests have emerged, two of which have been adopted as national standard test methods for concrete construction, the remaining one being prepared a national standard. In this paper we review the guiding or foundational principles that directed the development of these DI tests, with a view to assessing the appropriateness and relevance of these guiding principles to modern concretes. The last 30 years …
The Influence Of Waste Glass Powder On The Chloride Binding Capacity Of Fly Ash/Cement Hardened Paste, Jh Yan, Tingyu Hao
The Influence Of Waste Glass Powder On The Chloride Binding Capacity Of Fly Ash/Cement Hardened Paste, Jh Yan, Tingyu Hao
International Conference on Durability of Concrete Structures
The potential of using waste glass powder to increase the chloride binding capacity of fly ash/cement hardened paste was investigated. When only fly ash replacing cement, the chloride binding capacity was raised within 28d when the fly ash replacement level was in the range from 30-50% by mass. But at a longer age of 60 to 90d, the binding performance was increased at the replacement level of 10-30wt%. The chloride binding capacity of glass powder-fly ash-cement system was increased by adding glass powder of 2% and 4% by mass at 7d while those at larger addition and longer age reduced. …
Using Numerical Models Of Dewatering At Coal Ash Impoundments To Understand Cost And Schedule, Peter Bell, Joel Thompson, Don Fuller
Using Numerical Models Of Dewatering At Coal Ash Impoundments To Understand Cost And Schedule, Peter Bell, Joel Thompson, Don Fuller
World of Coal Ash Proceedings
No abstract provided.
Investigating Ccr Units And Evaluating The Physical Properties Of Ponded Ccr, David Skeggs, Zahra Aghazadeh, Rachel Combs
Investigating Ccr Units And Evaluating The Physical Properties Of Ponded Ccr, David Skeggs, Zahra Aghazadeh, Rachel Combs
World of Coal Ash Proceedings
No abstract provided.
Demonstration Of “No Migration” Alternative Performance Standard For Ccr Facilities In Arid To Semi- Arid Regions Using Unsaturated Zone Modeling, James Aiken, Katy Lindstom
Demonstration Of “No Migration” Alternative Performance Standard For Ccr Facilities In Arid To Semi- Arid Regions Using Unsaturated Zone Modeling, James Aiken, Katy Lindstom
World of Coal Ash Proceedings
No abstract provided.
Coal Combustion Residuals Management Using Geotextile Containers- Considerations For Various Options, Randall Wilcox, Gregg Lebster, Bryan Hamilton, Thomas Stephens
Coal Combustion Residuals Management Using Geotextile Containers- Considerations For Various Options, Randall Wilcox, Gregg Lebster, Bryan Hamilton, Thomas Stephens
World of Coal Ash Proceedings
No abstract provided.
State Vs Federal Ccr Rule Regulations: Comparisons And Impacts, Nicole Kron, Eric Nelson
State Vs Federal Ccr Rule Regulations: Comparisons And Impacts, Nicole Kron, Eric Nelson
World of Coal Ash Proceedings
No abstract provided.
Continuous, Real-Time Tss Monitoring Verifies Effluent Quality And Coal Ash Management Performance While Reducing Compliance Costs, Dave Fraley, Chris Bauman, Dave Donahue
Continuous, Real-Time Tss Monitoring Verifies Effluent Quality And Coal Ash Management Performance While Reducing Compliance Costs, Dave Fraley, Chris Bauman, Dave Donahue
World of Coal Ash Proceedings
No abstract provided.
Effect Of Coal Fly Ash On Agricultural Crops :Second Phase Showcase Project On Use Of Fly Ash In Agriculture In And Around Thermal Power Station Areas Of National Thermal Power Corporation Ltd., India., K. Arivazhagan, M. Ravichandran, S.K. Dube, V.K. Mathur
Effect Of Coal Fly Ash On Agricultural Crops :Second Phase Showcase Project On Use Of Fly Ash In Agriculture In And Around Thermal Power Station Areas Of National Thermal Power Corporation Ltd., India., K. Arivazhagan, M. Ravichandran, S.K. Dube, V.K. Mathur
World of Coal Ash Proceedings
No abstract provided.
Advantages Of Single Source Contracting In-Plant Ccr Services, Kevin Foody, Marcella Funderburg, Blake Whittington
Advantages Of Single Source Contracting In-Plant Ccr Services, Kevin Foody, Marcella Funderburg, Blake Whittington
World of Coal Ash Proceedings
No abstract provided.
Design And Construction Of A Ccr Landfill Adjacent To The Missouri River, Thomas Gredell, Jeffrey Fouse, Jay Ellington
Design And Construction Of A Ccr Landfill Adjacent To The Missouri River, Thomas Gredell, Jeffrey Fouse, Jay Ellington
World of Coal Ash Proceedings
No abstract provided.
Geochemical Tools For Groundwater Monitoring At Coal Fired Utilities, Jeff Gillow, Bruce Sass, Hari Parthasarathy
Geochemical Tools For Groundwater Monitoring At Coal Fired Utilities, Jeff Gillow, Bruce Sass, Hari Parthasarathy
World of Coal Ash Proceedings
No abstract provided.
Bottom Ash Handling Conversions – Lessons Learned, Dustin Doerr
Bottom Ash Handling Conversions – Lessons Learned, Dustin Doerr
World of Coal Ash Proceedings
No abstract provided.
Locating And Permitting A Ccr Landfill Adjacent To The Missouri River, Paul Reitz, Thomas Gredell, Jay Ellington
Locating And Permitting A Ccr Landfill Adjacent To The Missouri River, Paul Reitz, Thomas Gredell, Jay Ellington
World of Coal Ash Proceedings
No abstract provided.
Encapsulation Of Thermoevaporation Brines Using Coal Combustion Residuals, Dale Prentice, Kirk Ellison, Gaurav Sant
Encapsulation Of Thermoevaporation Brines Using Coal Combustion Residuals, Dale Prentice, Kirk Ellison, Gaurav Sant
World of Coal Ash Proceedings
No abstract provided.
Recycling Of Coal Ash In Agriculture: Use Of Vermicomposting Biotechnology, G.N. Chattopadhyay, Gourab Roy, Wasim Iftikar
Recycling Of Coal Ash In Agriculture: Use Of Vermicomposting Biotechnology, G.N. Chattopadhyay, Gourab Roy, Wasim Iftikar
World of Coal Ash Proceedings
No abstract provided.
Surface Water And Groundwater Mixing In Alluvial Floodplains: A Significant Issue For Understanding Contaminant Transport At Coal Ash Facilities Adjacent To Rivers, Joel Thompson, Peter Bell, John Griggs
Surface Water And Groundwater Mixing In Alluvial Floodplains: A Significant Issue For Understanding Contaminant Transport At Coal Ash Facilities Adjacent To Rivers, Joel Thompson, Peter Bell, John Griggs
World of Coal Ash Proceedings
No abstract provided.
Alternate Source Demonstration Considerations Within The Appalachian Basin, Joseph Robb, Larry Mastera
Alternate Source Demonstration Considerations Within The Appalachian Basin, Joseph Robb, Larry Mastera
World of Coal Ash Proceedings
No abstract provided.
Alkali-Silica Reaction Of Geopolymer Concrete Made Of Circulating Fluidized Bed Combustion Fly Ash, Chang-Seon Shon, Dong-Un Lee
Alkali-Silica Reaction Of Geopolymer Concrete Made Of Circulating Fluidized Bed Combustion Fly Ash, Chang-Seon Shon, Dong-Un Lee
World of Coal Ash Proceedings
No abstract provided.
Is Zero Solid Waste Possible For Fly Ash Produced From Any Coal-Fired Power Plant?, Jinder Jow, Yang Dong, Shuqiang Ding, Li Qiao
Is Zero Solid Waste Possible For Fly Ash Produced From Any Coal-Fired Power Plant?, Jinder Jow, Yang Dong, Shuqiang Ding, Li Qiao
World of Coal Ash Proceedings
No abstract provided.
Groundwater Corrective Action Assessment Using Fate And Transport Modeling, Brian Hennings, Glenn Luke, Jacob Walczak
Groundwater Corrective Action Assessment Using Fate And Transport Modeling, Brian Hennings, Glenn Luke, Jacob Walczak
World of Coal Ash Proceedings
No abstract provided.
The Application Of Natural Attenuation At Coal Combustion Residual (Ccr) Sites, Ryan Fimmen, Allison Kreinberg
The Application Of Natural Attenuation At Coal Combustion Residual (Ccr) Sites, Ryan Fimmen, Allison Kreinberg
World of Coal Ash Proceedings
No abstract provided.
Coal Ash 2.0: The Calculus Of The Ore Body, Claudio Arato
Coal Ash 2.0: The Calculus Of The Ore Body, Claudio Arato
World of Coal Ash Proceedings
No abstract provided.
Extensive Real Time Monitoring Of Ash Response To Construction-Induced Activity, Anita Perry, Alex Rudy, Kenny Campbell, Ryan Smith
Extensive Real Time Monitoring Of Ash Response To Construction-Induced Activity, Anita Perry, Alex Rudy, Kenny Campbell, Ryan Smith
World of Coal Ash Proceedings
No abstract provided.
Large Scale Processing Of Fly Ash And International Supply Chains, Rishit Dalal
Large Scale Processing Of Fly Ash And International Supply Chains, Rishit Dalal
World of Coal Ash Proceedings
No abstract provided.
Cpt-Based Classification And Microstructure Identification Of Coal Combustion Residuals, Andrew Fuggle, Longde Jin, Grant Martin
Cpt-Based Classification And Microstructure Identification Of Coal Combustion Residuals, Andrew Fuggle, Longde Jin, Grant Martin
World of Coal Ash Proceedings
No abstract provided.
Profitable Utilization Of Non-Standard Fly Ash And Ponded Ash With Commercialized Technology, Erik Severin, Alex Koszo
Profitable Utilization Of Non-Standard Fly Ash And Ponded Ash With Commercialized Technology, Erik Severin, Alex Koszo
World of Coal Ash Proceedings
No abstract provided.