Download or read book Beneficial Use of Coal Combustion Fly Ash written by Mark Santana and published by . This book was released on 2009 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Properties and Use of Coal Fly Ash written by Lindon K.A. Sear and published by Thomas Telford. This book was released on 2001-10-15 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book draws together a large quantity of research that has been carried out on pulverised fuel ash (PFA) over the past 30 years.In addition to covering the potential uses of PFA it provides an overview of the benefits of use.

Download or read book Combustion Ash Residue Management written by Richard W. Goodwin and published by William Andrew. This book was released on 2013-12-05 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combustion Ash and Residue Management assists owners and operators of Coal-fired and Resource Recovery Power Plants. By applying the principles and reviewing the case studies examples described within this book, accidents and upsets can be avoided and regulatory permitting can be achieved – reducing costs. This unique book is an essential reference for anybody responsible for disposal or utilization of combustion residues. It reflects over 30 years of engineering practice, applying the principles of concrete chemistry and civil engineering/soil mechanics as confirmed by field data. Dr. Richard Goodwin assesses the composition and environmental impact of combustion residues, and provides not only best practices for safe disposal, but also a blueprint for effective reuse, including applications like structural fill, grout, and capping material. Case studies and cost information for ash disposal options are included, in addition to the lessons learned by high-profile failures, such as the TVA Kingston fossil plant coal fly ash slurry spill in 2008. It also applies engineering principles to discuss how to avoid future upsets, including better operator training and monitoring methods. - A comprehensive update to reflect changes in legislation and practice, including new material on the safe disposal or beneficial use of coal ash - A straightforward engineering approach, providing practical guidance and field data - Written by an established expert in the field

Download or read book Ash from Coal and Biomass Combustion written by Ashok K. Singh and published by Springer Nature. This book was released on 2020-09-12 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a concise book with comprehensive information on coal and biomass ash generated from their combustion in thermal power plants. It presents detailed studies on ash generated from contrasting coal and biomass feedstocks, and provides a comparative evaluation of these different ashes in terms of their origin, properties, environmental hazards. Potential utilizations with specific advantages and disadvantages of the respective ashes are elaborated in detail, including some innovative means of ash utilization for value addition purposes. By addressing both the theory and commercial exploitation of these products, this book will be helpful for industrialists, academicians and researchers alike.

Download or read book Cold Weather Concrete Mix Design for the Beneficial Use of Coal Fly Ash as a Supplementary Cementitious Material written by and published by . This book was released on 2008 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coal combustion products (CCPs) are the byproducts generated from burning coal in coal-fired power plants. These byproducts include fly ash, bottom ash, boiler slag, and flue gas desulfurization gypsum.

Download or read book Coal Fly Ash Beneficiation written by Segun Akinyemi and published by BoD – Books on Demand. This book was released on 2018-01-31 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present book deals with various, very significant topics of coal fly ash beneficiation, such as treatment of acid mine drainage with coal fly ash, toxic metal adsorption using coal fly ash, recovery of metals from coal fly ash and phytoreclamation of abandoned acid mine drainage site after treatment with coal fly ash, the status of research in coal fly ash utilization and applications and some other related topics in this growing and increasingly important research area. Overall, coal fly ash beneficiation has come to assume an important role in most areas of waste management research today. Continued growth and emphasis on scientific research is expected in all areas of waste management and conversion of waste to wealth technologies.

Download or read book Coal Combustion Byproducts written by United States. Congress. House. Committee on Small Business. Subcommittee on Rural Development, Entrepreneurship, and Trade and published by . This book was released on 2010 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The subcommittee has called this hearing so that members might learn more about coal ash, the small businesses that turn coal ash into useful products and the concerns that these businesses have about the proposed Federal regulations that they believe may have a negative effect on their industry ... The EPA has recently issued two proposals for regulating coal ash. One would regulate coal ash as a solid waste and would provide very limited Federal enforceability and may not provide adequate protection of the environment and human health. The other would list coal ash as a special waste under the Hazardous Waste Subtitle in the Resource Conservation and Recovery Act, Subtitle C. The second option is one that we will focus on ... since it has generated great concerns among small businesses across this country. These businesses, many of which are represented here today, have reason to believe that regulating coal ash under Subtitle C, even as a special waste, will open recycling operations to added litigation and a stigma that will discourage the ... use of the products made with recycled coal ash."--P. 1-2.

Download or read book Characterization of Coal Combustion By Products CCBs for Their Effective Management and Utilization written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The main use of coal in India is for generation of electricity, both currently and apparently also in the future. In India approximately 70% of power generation has been through coal-fired thermal power plants. About 60% of produced coal is used for power generation. The coal which is used in power plants has an ash content of about 30-50%. The Coal Ash Administration that was established in 1993 with the objective of coordinating the effort at a national level to solve the problem of ash accumulation at the power plants, chose to deal with the problem by advancing the use of coal ash as a resource having economic value, in various sectors, as is done in most of the developed countries in the world. This site is intended to provide information regarding coal ash characteristics, beneficial uses of coal ash, both currently and in the future, in construction, infrastructures, industry and agriculture in India, to provide information on environmental quality issues, and to describe what is being done in this area to prevent damage to the environment and to improve it. Since coal fly ash consists of predominantly silt-sized particles, there is sometimes a concern about the possible frost susceptibility of fly ash as an embankment or structural backfill material, which can provide scope for environmentally safe. The major challenge with the introduction of the fly ash is its generation in unmanageable volumes which creates environmental problems in terms of land degradation, and degradation of air and water quality. The problem of storage and disposal of the fly ash creates a considerable pressure on land availability particularly in a densely populated country like India. Many researchers are working towards the large scale utilization of fly ash. The approaches include intermixing the fly ash with cement for civil construction work, manufacture of bricks, and utilization as a road pavement material and application as soil amendment medium for the plant growth.

Download or read book Coal Combustion Byproducts and Environmental Issues written by Kenneth S. Sajwan and published by Springer Science & Business Media. This book was released on 2006-06-15 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coal Combustion Byproducts and Environmental Issues addresses the major implications and critical issues surrounding coal combustion products and their impact upon the environment. It provides essential information for scientists conducting research on coal and coal combustion products, but also serves as a valuable reference for a wide variety of researchers and other professionals in the energy industry and in the fields of public health, engineering, and environmental sciences. The ultimate goal of this volume is to benefit both our economy and our environment as humanity enters the second half of the fossil fuel era.

Download or read book Coal Combustion Products CCPs written by Tom Robl and published by Woodhead Publishing. This book was released on 2017-05-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coal Combustion Products (CCPs): Their Nature, Utilization and Beneficiation is a valuable resource for engineers and scientists from the coal, cement, concrete, and construction industries seeking an in-depth guide to the characteristics, utilization, beneficiation, and environmental impacts of coal combustion by-products. Researchers in universities working in this area will also find much to expand their knowledge. The book provides a detailed overview of the different waste materials produced during power generation from coal, exploring their nature, beneficiation techniques, applications, and environmental impacts. Strong focus is placed on coal fly ash, bottom ash, and flue gas desulfurization materials, and their employment in cement, concrete, gypsum products, aggregates, road construction, geotechnics, and agriculture, among other products and industries. Part 1 focuses on the nature of coal ashes, with chapters on their origin, generation, and storage, both in ponds and landfill. The coal combustion by-products produced as a result of clean coal technologies are the focus of the final chapter in the section. The next group of chapters in Part 2 considers the utilization of different waste materials, including the key products coal fly ash, bottom ash, and flue gas desulfurization materials. This is followed by a contribution reviewing the latest research into innovative and advanced uses for coal ash. After an introduction to ash quality problems and quality monitoring, Part 3 concentrates on the essential area of by-product beneficiation techniques, in other words how to maximize the quality of materials for the end user. Topics covered include separation methods, thermal processing, and chemical passivation. The final section of the book addresses environmental issues, including the use of coal combustion by-products in green construction materials and the essential health and safety considerations associated with their use.

Download or read book Land Uses of Coal Fly Ash written by Irene M. Smith and published by . This book was released on 2005 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Use of Fly Ash in Concrete written by and published by . This book was released on 1989 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Enhancing the Beneficial Use of Fly Ash in Concrete and in Mine Reclamation written by Mina Mohebbi and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Combustion of coal to generate electricity produces huge volume of coal combustion products (CCPs) annually in the United States. Due to their promising physical and chemical characteristics, these byproducts can be beneficially used as supplementary cementitious materials (SCM) in portland cement concrete, mining applications, structural fills, and soil and waste stabilization. However, the efficiency and environmental impacts of such beneficial uses need to be further evaluated and enhanced. The unburned carbon (UC) content of fly ash impacts the performance (e.g., air entrainment and rheology) of concrete mixtures. The conventional loss on ignition (LOI) test to measure the UC may be overestimating as the weight change upon igniting fly ash could be the result of other physical and chemical reactions (e.g., calcination of carbonates, removal of bound water, and iron and sulfur oxidation) in addition to organic carbon burning. Moreover, reclamation of mine sites using coal ash has been shown to potentially alleviate the negative effects of mining activities such as neutralizing the acid mine drainage. However, during coal combustion process, trace elements are concentrated onto fly ash particles, and the long-term leaching of harmful elements from coal ash to subsurface aquifers is an environmental concern. This research studies focuses on evaluating and enhancing the beneficial uses of fly ash (as the predominant coal combustion byproduct) in two areas: 1- in portland cement concrete through measuring the UC content, and 2- in mine site reclamation through evaluating the leaching behavior of fly ash deposits to water resources in short and long terms. In the first part of this research study, a two-atmosphere thermogravimetric analysis (2A-TGA) coupled with mass spectrometry was performed to evaluate the chemical reactions that occur upon heating of fly ash and to measure the true UC content. 2A-TGA was performed under two distinct atmospheres: (i) in non-oxidizing helium gas, to measure weight loss due to decomposition of carbonates and loss of bound water, and (ii) in oxidizing air, to measure weight loss due to conversion of UC to CO2. The results were also compared with the total carbon (TC) measured using infrared spectroscopy. It was found that there is no one-to-one relationship between the LOI and the TC or UC contents of fly ash. LOI overestimated TC by up to 2.5 and overestimated UC by up to 6.4. Based on the results of this study, a practical alternative to 2A-TGA could be to heat fly ash in a non-oxidizing atmosphere (e.g., vacuum, He- or N2-purged furnace) up to 750 oC, followed by a conventional LOI test.In the second part of this study, leaching behavior of fly ash deposits was evaluated through (i) defining the host phases for environmentally important elements and (ii) developing a reactive transport model to predict the long-term leaching behavior. Determining the host phases was achieved through micro-characterizing the coal ash and flow-through column leaching tests. It was found that amorphous aluminosilicate is the main host phase for Si, Al, Fe, and, Mg. Alkalis such as Na, K, and trace elements including As and Se are also distributed in the bulk Al-Si glass in low concentrations. The Initially high concentrations of Ca and S in the leachate were mainly due to the dissolution of gypsum. Surface associated salts (e.g., sulfate and borate salts) dissolve Na, K, S, and B ions at early stages of leaching. Iron was found both as ferromagnetic particles containing magnetite and hematite, and also included in the amorphous phase in lower amounts. The host phases were then considered as input data for a quantitative reactive transport 1D model using CrunchFlow code. The calibrated model was used to predict the concentration of major elements (Ca, S, Si, Al, Fe, Na, K, Mg), and trace elements (As, Mo, Se, B) along 10 years of leaching. The leachate composition at early ages of leaching might exceed the environmental limits for S, B, Mo, and Al. However, in long-term the overall composition meets the leaching limits except for aluminum content. The porosity of compacted fly ash starts to increase from the top layers, and in long-term (e.g., 30 years of weathering) it reached from 28% to 45%, which can significantly affect the stability and transport properties.

Download or read book Coal Ash Beneficial Use in Mine Reclamation and Mine Drainage Remediation in Pennsylvania written by and published by . This book was released on 2004 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Guide to the Use of Coal Combustion Products Fly Ash and Furnace Bottom Ash in Roads and Embankments written by Ash Development Association of Australia and published by . This book was released on 2004 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods for Evaluating Fly Ash for Use in Highway Concrete written by Lawrence L. Sutter and published by Transportation Research Board. This book was released on 2013 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) 749: Methods for Evaluating Fly Ash for Use in Highway Concrete presents suggested changes to coal fly ash specifications and test protocols contained in American Association of State Highway and Transportation Officials (AASHTO) Standard Specifications for Transportation Materials and Methods of Sampling and Testing (AASHTO M 295). The changes suggested include modifications to the test methods currently specified for evaluating acceptability of fly ash for use in highway concrete as well as the introduction of new test methods for enhancing such evaluations. Attachment C: Details of the Research into Methods for Evaluating Fly Ash Use in Highway Concrete is only available online."--Publisher description.

Download or read book BENEFICIAL USES OF COAL FLY ASH written by and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: