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Optimizing The Use Of Fly Ash In Concrete
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Book Synopsis Optimizing the Use of Fly Ash in Concrete by : M. D. A. Thomas
Download or read book Optimizing the Use of Fly Ash in Concrete written by M. D. A. Thomas and published by . This book was released on 2007 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The optimum amount of fly ash varies not only with the application, but also with composition and proportions of all the materials in the concrete mixture (especially the fly ash), the conditions during placing (especially temperature), construction practices (for example, finishing and curing) and the exposure conditions. This document discusses issues related to using low to very high levels of fly ash in concrete and provides guidance for the use of fly ash without compromising the construction process or the quality of the finished product. The nature of fly ashes including their physical, mineralogical and chemical properties is covered in detail, as well as fly ash variability due to coal composition and plant operating conditions. A discussion on the effects of fly ash characteristics on fresh and hardened concrete properties includes; workability, bleeding, air entrainment, setting time, heat of hydration, compressive strength development, creep, drying shrinkage, abrasion resistance, permeability, resistance to chlorides, alkali-silica reaction (ASR), sulfate resistance, carbonation, and resistance to freezing and thawing and deicer salt scaling. Case studies were selected as examples of some of the more demanding applications of fly ash concrete for ASR mitigation, chloride resistance, and green building.
Book Synopsis Optimizing the Usage of Fly Ash in Concrete Mixes by : Sabelo N. F. Zulu
Download or read book Optimizing the Usage of Fly Ash in Concrete Mixes written by Sabelo N. F. Zulu and published by . This book was released on 2017 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optimizing the Amount of Class C Fly Ash in Concrete Mixtures by : RM. Majko
Download or read book Optimizing the Amount of Class C Fly Ash in Concrete Mixtures written by RM. Majko and published by . This book was released on 1984 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes the results of a two part research program on several laboratory air-entrained concrete mixtures designed to contain increasing amounts of moderately cementitious Class C fly ash. In the first part of the paper, a Type A admixture was used in half of the mixtures, treating both the portland cement Type I and fly ash (15% calcium oxide). In the second part of the paper, three other Class C fly ashes (9 to 12% calcium oxide) were extensively tested in concrete that contained a Type A admixture (but this time treating only the cement). Two very high lime fly ashes (25 to 30% calcium oxide) were also tested in concrete mixtures.
Book Synopsis Optimization of Fly Ash Replacement in High Volume Fly Ash Concrete by :
Download or read book Optimization of Fly Ash Replacement in High Volume Fly Ash Concrete written by and published by . This book was released on 1991 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes research performed to determine the optimum fly ash content in the high volume system. Optimum is defined as the fly ash content for a given water-cementitious ratio which produces the most economical concrete on the basis of cost per MPa. Three series of concrete mixtures were evaluated. Mixtures were performed at a water cementitious ratio of 0.25, 0.27 and 0.32 at fly ash replacement (based on total cementitious) of 50, 55, 60 and 65 percent. The fly ash content varied from 45 to 60 percent for these tests. Materials included Portland cement; low calcium fly ash from the coal fired thermal generating plant in Lingan, NS; coarse aggregate from a Halifax quarry; fine aggregate (natural sand); superplasticizer; air-entraining mixtures; and concrete mixtures. Compressive strength specimens were cast for laboratory storage and testing at 3, 7, 28, and 91 days. Three specimens were tested at each age.
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:
Book Synopsis Optimization of Fly-ash-based Concrete Formulations by :
Download or read book Optimization of Fly-ash-based Concrete Formulations written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fly Ash in Concrete written by K. Wesche and published by CRC Press. This book was released on 2004-03-01 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a state-of-the-art report which documents current knowledge on the properties of fly ash in concrete and the use of fly ash in construction. It includes RILEM Recommendations on fly ash in concrete and a comprehensive bibliography including over 800 references.
Book Synopsis CIGOS 2019, Innovation for Sustainable Infrastructure by : Cuong Ha-Minh
Download or read book CIGOS 2019, Innovation for Sustainable Infrastructure written by Cuong Ha-Minh and published by Springer Nature. This book was released on 2019-10-10 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected articles from the 5th International Conference on Geotechnics, Civil Engineering Works and Structures, held in Ha Noi, focusing on the theme “Innovation for Sustainable Infrastructure”, aiming to not only raise awareness of the vital importance of sustainability in infrastructure development but to also highlight the essential roles of innovation and technology in planning and building sustainable infrastructure. It provides an international platform for researchers, practitioners, policymakers and entrepreneurs to present their recent advances and to exchange knowledge and experience on various topics related to the theme of “Innovation for Sustainable Infrastructure”.
Book Synopsis Optimization of Concrete Mixes with High Volume of Fly Ash by : Lieska Carrillo
Download or read book Optimization of Concrete Mixes with High Volume of Fly Ash written by Lieska Carrillo and published by . This book was released on 2002 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Discussion of "Optimizing the Amount of Class C Fly Ash in Concrete Mixtures" by R. M. Majko and M. F. Pistilli by : W. Barry Butler
Download or read book Discussion of "Optimizing the Amount of Class C Fly Ash in Concrete Mixtures" by R. M. Majko and M. F. Pistilli written by W. Barry Butler and published by . This book was released on 1985 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improving Concrete and Mortar using Modified Ash and Slag Cements by : Leonid Dvorkin
Download or read book Improving Concrete and Mortar using Modified Ash and Slag Cements written by Leonid Dvorkin and published by CRC Press. This book was released on 2020-04-18 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of concrete and mortar containing coal fly ash, blast furnace slag, and other dispersed technogenic materials is one of the major areas of potential resource savings and improving the environmental efficiency and sustainability of construction. Improving Concrete and Mortar using Modified Ash and Slag Cements presents the results of a study of high-tech concrete on composite Portland cement and slag Portland cement. It explains the possibility of significantly improving the properties of cements and concrete with the introduction of superplasticizers and hardening activators. Features: Describes how additives can reduce costs and lead to more environmentally sustainable production Explains the possibility of obtaining high-tech concrete with a high content of ash, slag, and clinker kiln dust Presents the possibility of significant reductions of the most energy-intensive component of cements Examines the calculated dependences for predicting the technical properties of concrete saturated with dispersed technogenic products Explains the methods of calculating the composition of concrete with specified properties of low-clinker cements Suitable for civil and structural engineers as well as for specialists working in the field of concrete technology, students of civil engineering, and researchers of new construction technologies, this book allows readers to understand new and sustainable ways to improve the properties of concrete and mortar by utilizing additives.
Book Synopsis Optimization of High Performance Fly Ash Concrete for Bridge Deck Overlay and Effect of Air Content on Permeability of Concrete by : Soma Sundar Srinivasa Murthy
Download or read book Optimization of High Performance Fly Ash Concrete for Bridge Deck Overlay and Effect of Air Content on Permeability of Concrete written by Soma Sundar Srinivasa Murthy and published by . This book was released on 2001 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fly Ash Optimization by : Douglas R. Benjamin
Download or read book Fly Ash Optimization written by Douglas R. Benjamin and published by . This book was released on 1999 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optimization of the Physical and Compositional Characteristics of Fly Ash Cement for the Production of Sulfate Resistant Concrete by : Reed B. Freeman
Download or read book Optimization of the Physical and Compositional Characteristics of Fly Ash Cement for the Production of Sulfate Resistant Concrete written by Reed B. Freeman and published by . This book was released on 1992 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optimization of Soil Stabilization with Class C Fly Ash by : John Michael Pitt
Download or read book Optimization of Soil Stabilization with Class C Fly Ash written by John Michael Pitt and published by . This book was released on 1987 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous Iowa DOT sponsored research has shown that some Class C fly ashes are ementitious (because calcium is combined as calcium aluminates) while other Class C ashes containing similar amounts of elemental calcium are not (1). Fly ashes from modern power plants in Iowa contain significant amounts of calcium in their glassy phases, regardless of their cementitious properties. The present research was based on these findings and on the hyphothesis that: attack of the amorphous phase of high calcium fly ash could be initiated with trace additives, thus making calcium available for formation of useful calcium-silicate cements. Phase I research was devoted to finding potential additives through a screening process; the likely chemicals were tested with fly ashes representative of the cementitious and non-cementitious ashes available in the state. Ammonium phosphate, a fertilizer, was found to produce 3,600 psi cement with cementitious Neal #4 fly ash; this strength is roughly equivalent to that of portland cement, but at about one-third the cost. Neal #2 fly ash, a slightly cementitious Class C, was found to respond best with ammonium nitrate; through the additive, a near-zero strength material was transformed into a 1,200 psi cement. The second research phase was directed to optimimizing trace additive concentrations, defining the behavior of the resulting cements, evaluating more comprehensively the fly ashes available in Iowa, and explaining the cement formation mechanisms of the most promising trace additives. X-ray diffraction data demonstrate that both amorphous and crystalline hydrates of chemically enhanced fly ash differ from those of unaltered fly ash hydrates. Calciumaluminum- silicate hydrates were formed, rather than the expected (and hypothesized) calcium-silicate hydrates. These new reaction products explain the observed strength enhancement. The final phase concentrated on laboratory application of the chemically-enhanced fly ash cements to road base stabilization. Emphasis was placed on use of marginal aggregates, such as limestone crusher fines and unprocessed blow sand. The nature of the chemically modified fly ash cements led to an evaluation of fine grained soil stabilization where a wide range of materials, defined by plasticity index, could be stabilized. Parameters used for evaluation included strength, compaction requirements, set time, and frost resistance.
Book Synopsis Optimization of Fly Ash Content in Bridge Deck Concrete by : Ravi Gadhi
Download or read book Optimization of Fly Ash Content in Bridge Deck Concrete written by Ravi Gadhi and published by . This book was released on 2001 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :E. E. Berry Publisher :Energy, Mines and Resources Canada : CANMET, Canadian Centre for Mineral and Energy Technology ISBN 13 : Total Pages :206 pages Book Rating :4.:/5 (318 download)
Book Synopsis Fly Ash in Concrete by : E. E. Berry
Download or read book Fly Ash in Concrete written by E. E. Berry and published by Energy, Mines and Resources Canada : CANMET, Canadian Centre for Mineral and Energy Technology. This book was released on 1986 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents a state-of-the-art review of the principaladvances in research, development, and practical application offly ash in concrete that have been made during the period 1976to 1984. Recommendations are made with regard to aspects of flyash concrete technology requiring further research.
