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The Influence Of Fly Ash On Obtaining Quality Plastic And Hardened Properties Of Portland Cement Concrete
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Book Synopsis The Influence of Fly Ash on Obtaining Quality Plastic and Hardened Properties of Portland Cement Concrete by : Ashaari Bin Mohamad
Download or read book The Influence of Fly Ash on Obtaining Quality Plastic and Hardened Properties of Portland Cement Concrete written by Ashaari Bin Mohamad and published by . This book was released on 1989 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Influence of Fly Ash on Obtaining Quality Plastic and Hardened Properties of Portland Cement Concrete by : David L. Gress
Download or read book The Influence of Fly Ash on Obtaining Quality Plastic and Hardened Properties of Portland Cement Concrete written by David L. Gress and published by . This book was released on 1987 with total page 280 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 Handbook on fly ash in concrete by : Dietmar Lutze
Download or read book Handbook on fly ash in concrete written by Dietmar Lutze and published by Verlag Bau+Technik. This book was released on 2013-03-20 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: When used as an addition and binder component, fly ash has become an indispensable construction material for many concrete applications. The conditions produced in power stations when firing fine pulverized coal result in the formation of a reactive, flour-fine, pozzolanic mineral material from the accompanying rock in the coal. Owing to its specific characteristics it has a positive impact on the properties of fresh and hardened concrete and facilitates cost-effective production of high-grade, durable concretes. The authors of this handbook have combined the latest discoveries from the field of research with practical experience of the use and effects of fly ash in concrete. This handbook provides the necessary information and makes interesting suggestions for selective use of fly ash in concrete.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1989 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of High Volume Fly Ash and Powder Activators on Plastic and Hardened Concrete Properties by : Drew Alexander Davis
Download or read book Effects of High Volume Fly Ash and Powder Activators on Plastic and Hardened Concrete Properties written by Drew Alexander Davis and published by . This book was released on 2012 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was performed to examine the effects of high volumes of Class C fly ash modified by powder activators upon the plastic and hardened properties of concrete. In a companion study, five Missouri area cements and five Class C fly ashes were examined for incompatibilities, with the most and least reactive combinations being scaled up to full scale concrete testing. Two baseline concrete mixtures were examined, the only difference in mixtures being the sources of portland cement and fly ash. Fly ash replacement was examined at 50% and 70% replacement (by total cementitious mass). Three powder activators were used in combination with the cement and fly ash mixtures: 4% gypsum, 10% hydrated lime, and 20% rapid set cement (by mass of fly ash). Gypsum was present in all concrete mixes, with either hydrated lime or rapid set cement acting as an activator in combination with it. Both plastic concrete and hardened concrete properties were examined. The use of powdered activators in combination with fly ash resulted in the concrete exhibiting adequate 28 day strength, stiffer moduli, less drying shrinkage, lower chloride permeability, and improved resistance to freezing and thawing at 50% fly ash replacement when compared to a baseline mix, although the mixture suffered in abrasion resistance and salt scaling resistance. At 70% fly ash replacement, the mixtures performed poorly compared to their baseline counterparts, even with the addition of rapid set cement. The choice of activator primarily affected the early age strength and setting time, with rapid set cement mixtures exhibiting a quicker set and a higher earlier strength than the hydrated lime mixtures, though this did not correspond to improved characteristics in the long term. In applications where early properties are not important, the use of less expensive calcium hydroxide is recommended. In any applications, however, the specific cement and fly ash sources should be examined for possible incompatibilities.
Book Synopsis Updating Physical and Chemical Characteristics of Fly Ash for Use in Concrete by : Prasanth Tanikella
Download or read book Updating Physical and Chemical Characteristics of Fly Ash for Use in Concrete written by Prasanth Tanikella and published by . This book was released on 2018-02-15 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: When incorporated in concrete mixtures, fly ashes are known to influence both its fresh and hardened properties. An accurate and quick technique to predict the extent of this influence based on the characteristics of fly ash would be highly beneficial in terms of field applications. The current study was an attempt to quantify the effects of fly ashes on the properties of pastes as a function of: (a) the mean particle size of the fly ash particles, (b) their fineness and (c) their chemical composition. In addition, since the type and the amount of glass present in the fly ash significantly affect its reactivity, this property was also included in the investigation.Twenty different fly ashes (both, ASTM Class C and Class F), obtained from power plants in and around Indiana, were characterized during the Phase 1 of the study. The information collected included: physical characteristics, chemical composition and the amount and type of glass present. Phase 2 of the study consisted of evaluation of various properties of binary paste systems (portland cement with 20% of cement of fly replacement). The evaluated properties included: the set time, the heat of hydration, the strength activity index, the non-evaporable water content and the amount of calcium hydroxide formed at different ages.These results obtained from both phases of the study were used to build statistical models for prediction of previously evaluated properties for any hypothetical fly ash with similar characteristics. The models included only the most significant variables, i.e., those which were found to most strongly affect any specific property. The variables to be included in the model were selected based on the adjusted R2 values.As a result of the modeling process, it was found that the sets of statistically significant variables affecting the properties consisted of both physical and chemical characteristics of the fly ash and that the combination of these variables was unique for each property evaluated.
Book Synopsis Properties of Fresh and Hardened Concrete Containing Supplementary Cementitious Materials by : Nele De Belie
Download or read book Properties of Fresh and Hardened Concrete Containing Supplementary Cementitious Materials written by Nele De Belie and published by Springer. This book was released on 2017-12-09 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume represents the current knowledge on the effect of SCMs (slag, fly ash, silica fume, limestone powder, metakaolin, natural pozzolans, rice husk ash, special SCMs, ternary blends) on the properties of fresh and hardened concrete (e.g. early strength development, workability, shrinkage) and curing requirements. Other topics treated in the book are postblending vs preblending, implications of SCM variability, interaction between SCM and commonly used admixtures (e.g. superplasticizers, air entrainers).
Book Synopsis Properties and Use of Coal Fly Ash by : Lindon K.A. Sear
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.
Book Synopsis HRIS Abstracts by : National Research Council (U.S.). Highway Research Board
Download or read book HRIS Abstracts written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1987 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 Hardened Concrete Properties and Durability Assessment of High Volume Fly Ash Concrete by : Kyle Marie Marlay
Download or read book Hardened Concrete Properties and Durability Assessment of High Volume Fly Ash Concrete written by Kyle Marie Marlay and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Concrete is produced more than any other material in the world. Sustainable construction is extremely important in today's industry and fly ash is the leading material for sustainable concrete design. The addition of fly ash improves many fresh and hardened concrete properties. However, the slow hydration process associated with fly ash makes the use of the material in large amounts undesirable in conventional construction. This study evaluated the hardened concrete and durability performance of several high-volume fly ash (HVFA) concrete mixes. The various HVFA concrete mixes evaluated within this study consisted of 70 percent replacement of portland cement by weight of cementitious material and water-to-cementitious ratios (w/cm) ranging from 0.30 to 0.45. Studies were conducted on hardened properties including: compressive strength, flexural strength, splitting tensile strength, and modulus of rupture. A shrinkage analysis was also performed to evaluate drying and free shrinkage. The durability performance of the HVFA concrete was also evaluated. Results obtained from the tests revealed that compressive strengths of HVFA concrete are comparable to portland cement concrete with a reduced w/cm. Also, a reduction in concrete shrinkage was observed for HVFA concrete. The durability testing showed HVFA concrete increased the corrosion resistance and decreased the chloride penetration. Finally, existing relationships for hardened material properties and durability of conventional concretes are applicable to HVFA concretes"--Abstract, p. iii
Book Synopsis Integrated Materials and Construction Practices for Concrete Pavement by :
Download or read book Integrated Materials and Construction Practices for Concrete Pavement written by and published by . This book was released on 2006 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manual of integrated material and construction practices for concrete pavements.
Book Synopsis Utilization of Alaskan Fly Ash in Concrete by : David Wayne Evans
Download or read book Utilization of Alaskan Fly Ash in Concrete written by David Wayne Evans and published by . This book was released on 1999 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Fly ash is a by-product of electric power generated by coal combustion. Fly ash is filtered from the boiler exhaust and collected as a fine particulate residue. Prior to this study use of this material by Alaska's industry had been limited. This research focused on fly ash meeting the specifications for ASTM Type C. Fly ash meeting this criteria is known to possess cementitious and pozzolanic qualities. The purpose of this investigation was to look at the influence of fly ash on the rheology of fresh concrete and properties of hardened concrete. Concrete mixes with replacements of both Portland cement and fine aggregate ranging from 0 to 80% and 0 to 100%, respectively, were produced. Replacements were based on weight ratios at constant volumes. Three cement factors were used to complete the testing matrix. Results were obtained for generalization of hardened concrete properties and mix design relationships"--Leaf iii.
Book Synopsis ERDA Energy Research Abstracts by : United States. Energy Research and Development Administration
Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1977 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
