Restrained Shrinkage Behavior Of Heat Cured High Early Strength High Performance Concrete Hes Hpc

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Restrained Shrinkage Behavior of Heat-cured, High Early-strength High-performance Concrete (HES-HPC)

Author : Jonathan Eagelton
Publisher :
ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.:/5 (872 download)

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Book Synopsis Restrained Shrinkage Behavior of Heat-cured, High Early-strength High-performance Concrete (HES-HPC) by : Jonathan Eagelton

Download or read book Restrained Shrinkage Behavior of Heat-cured, High Early-strength High-performance Concrete (HES-HPC) written by Jonathan Eagelton and published by . This book was released on 2014 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: For decades, High Performance Concrete has commonly been used in bridge decks due to its high strength and durability. Despite these properties, cracking in decks continues to be a challenge for bridge engineers. Cracking in bridge decks can lead to weaker structural members, increased damage during freeze-thaw cycles, and accelerated corrosion. These issues lead to more frequent maintenance as the deck needs to be replaced, which raises costs. Causes of cracking includes: harsh weather conditions during pour or curing, high shrinkage stresses, and extremely high live loads due to overweight truck traffic. There is some belief that freshly poured concrete will develop some stress as adjacent lanes are loaded with trucks. Since the concrete is still weak at this stage, it is believed that the strain caused by this stress generation may be large enough to cause cracking. Because of this, the New Jersey Turnpike Authority (NJTA) has recently developed Supplementary Technical Specifications for a High Early Strength HPC (HES-HPC) to replace bridge decks during staged construction. Higher early age strength can be achieved by increasing the rate of hydration, which can be accomplished with higher temperatures. Part of the specifications suggests the use of a heat blanket to keep the concrete at higher temperatures in the early hours to achieve a faster strength gain. Despite this proposition, heat blanket cured concrete has yet to be tested for restrained shrinkage using the ring test. Additionally, shrinkage reducing admixture has yet to be studied for HES-HPC, despite the possibility of its applicability. The restrained shrinkage ring test is used to compare the cracking tendency of HPC, typical HES-HPC, and heat cured HES-HPC. Shrinkage reducing admixture is also studied to determine if it can be practically applied to HES-HPC. Results of the restrained shrinkage test are also correlated with the free shrinkage results. Crack development is monitored throughout the test and used for comparison.

Physical Properties and Behaviour of High-Performance Concrete at High Temperature

Author : Pierre Pimienta
Publisher : Springer
ISBN 13 : 3319954326
Total Pages : 152 pages
Book Rating : 4.3/5 (199 download)

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Book Synopsis Physical Properties and Behaviour of High-Performance Concrete at High Temperature by : Pierre Pimienta

Download or read book Physical Properties and Behaviour of High-Performance Concrete at High Temperature written by Pierre Pimienta and published by Springer. This book was released on 2018-09-11 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the work done by the RILEM Technical Committee 227-HPB (Physical properties and behaviour of High-Performance Concrete at high temperature). It contains the latest research results on the behaviour of high-performance concretes at high temperature. The book presents the state of the art of experimental data on High-Performance concretes and it collects and synthesizes useful data about concrete behaviour at high temperatures. The book is divided into independent chapters dealing with degradation reactions in concrete exposed to high temperatures; mass transport properties; thermal properties; and mechanical properties. The results presented especially target a group of users composed by universities and testing laboratories, building material companies and industries, material scientists and experts, building and infrastructure authorities, designers and civil engineers.

Early Volume Change of High Performance Concrete

Author : ABDULAZIZ MOHAMMED. ALASKAR
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (133 download)

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Book Synopsis Early Volume Change of High Performance Concrete by : ABDULAZIZ MOHAMMED. ALASKAR

Download or read book Early Volume Change of High Performance Concrete written by ABDULAZIZ MOHAMMED. ALASKAR and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In severe chloride/sulfate exposure conditions, there is need to provide more durable concrete, but this usually requires use of concretes with high cementitious binder contents that increase the risk of cracking due to thermal, autogenous, and drying shrinkage. Cracking is counter-productive to obtaining durability in the field. High performance concrete (HPC) can be durable in aggressive environments due to its superior mechanical, resistance to fluid transport, and durability characteristics. However, HPC mixtures typically have high binder contents (cement, pozzolanic minerals), and low w/cm, and therefore undergo high heat of hydration as well as autogenous shrinkage, resulting in rapid volume changes. The increased risk of autogenous deformation in high performance concrete can increase the risk of the cracking and durability of reinforced concrete structures such as bridge decks. For example, in Ontario the MTO had issues with in-creased incidence of transverse cracking in bridge decks when 50 MPa HPC was used relative to traditional 35 MPa concretes. A review of their construction records indicated that this problem was often related to concretes that set quickly and rapidly developed high temperature rise due to heat of hydration. The effects of ground granulated blast-furnace slag (GGBFS) and silica fume (SF) on the durability of HPC were investigated. In this study, HPC mixtures at 0.33 w/c were made with three sources of blended cements containing 8% SF mixed with 25, 35 and 50% GGBFS replacements by mass of cement. The compressive strength, drying shrinkage, and transport properties were measured. The test results have shown that increased fineness of the silica fume blended cement enhances the resistance to fluid transport and mechanical properties, but results in increased drying shrinkage, leading to increased cracking potential. A comprehensive study was conducted to understand (a) the interrelation between different mechanisms of volume change (thermal deformation, autogenous shrinkage, drying shrinkage) under different standard and non-standard conditions and (b) the role of different shrinkage mitigation methods (e.g. by either increasing GGBFS content to overcome early-age free and re-strained thermal deformation as well as autogenous shrinkage, or by reducing the cement binder content).

Early-age Shrinkage of Ultra High-performance Concrete

Author : Ahmed Mohammed Soliman
Publisher :
ISBN 13 :
Total Pages : 764 pages
Book Rating : 4.:/5 (16 download)

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Book Synopsis Early-age Shrinkage of Ultra High-performance Concrete by : Ahmed Mohammed Soliman

Download or read book Early-age Shrinkage of Ultra High-performance Concrete written by Ahmed Mohammed Soliman and published by . This book was released on 2011 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: The very high mechanical strength and enhanced durability of ultra highperformance concrete (UHPC) make it a strong contender for several concrete applications. However, UHPC has a very low water-to-cement ratio, which increases its tendency to undergo early-age shrinkage cracking with a risk of decreasing its long-term durability. To reduce the magnitude of early-age shrinkage and cracking potential, several mitigation strategies have been proposed including the use of shrinkage reducing admixtures, internal curing methods (e.g. superabsorbent polymers), expansive cements and extended moist curing durations. To appropriately utilize these strategies, it is important to have a complete understanding of the driving forces behind early-age volume change and how these shrinkage mitigation methods work from a materials science perspective to reduce shrinkage under field like conditions. This dissertation initially uses a first-principles approach to understand the interrelation mechanisms between different shrinkage types under simulated field conditions and the role of different shrinkage mitigations methods. The ultimate goal of the dissertation is to achieve lower early-age shrinkage and cracking risk concrete along with reducing its environmental and economic impact. As a result, a novel environmentally friendly shrinkage reducing technique based on using partially hydrated cementitious materials (PHCM) from waste concrete is proposed. The PHCM principle, mechanisms and efficiency were evaluated compared to other mitigation methods. Furthermore, the potential of replacing cement with wollastonite microfibers was investigated as a new strategy to produce UHPC with lower carbon foot-print, through reducing the cement production. Finally, an artificial neural networks (ANN) model for early-age autogenous shrinkage of concrete was proposed. The evidence and insights provided by the experiments can be summarized in: drying and autogenous shrinkage are dependant phenomena and applying the conventional superposition principle will lead to an overestimation of the actual autogenous shrinkage, adequately considering in-situ conditions in testing protocols should allow gaining a better understanding of shrinkage mitigation mechanisms, the iii PHCM technique provides a passive internal restraining system that resists deformation as early as the cementitious materials are mixed, wollastonite microfibers can act as an internal restraint for shrinkage, reinforcing the microstructure at the micro-crack level and leading to an enhancement of the early-age engineering properties, along with gaining environmental benefits, and ANN showed success in predicting autogenous shrinkage under simulated field conditions.

Mechanical Behavior of High Performance Concretes

Author :
Publisher :
ISBN 13 :
Total Pages : 179 pages
Book Rating : 4.:/5 (929 download)

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Book Synopsis Mechanical Behavior of High Performance Concretes by :

Download or read book Mechanical Behavior of High Performance Concretes written by and published by . This book was released on 1993 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Early Age Shrinkage of High Performance Concrete

Author : Maqbool Ahmed Mohammed
Publisher :
ISBN 13 :
Total Pages : 218 pages
Book Rating : 4.:/5 (556 download)

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Book Synopsis Early Age Shrinkage of High Performance Concrete by : Maqbool Ahmed Mohammed

Download or read book Early Age Shrinkage of High Performance Concrete written by Maqbool Ahmed Mohammed and published by . This book was released on 2003 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

High Performance Concretes

Author : Paul Zia
Publisher :
ISBN 13 :
Total Pages : 262 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis High Performance Concretes by : Paul Zia

Download or read book High Performance Concretes written by Paul Zia and published by . This book was released on 1991 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: This state-of-the-art report summarizes the results of an extensive search and review of available literature on the mechanical properties of concrete, with particular reference to high performance concrete for highway applications. Included in the review and discussion are the behavior of plastic concrete as well as the strength and deformation characteristics of hardened concrete. Both short-term and long-term effects are considered. Based on the review of the available information, research needs are identified. It is concluded that much research is needed to develop data on the strength and durability properties of concrete which develops high strength, particularly very early strength.

Materials for Civil and Construction Engineers: Pearson New International Edition

Author : Michael S. Mamlouk
Publisher : Pearson Higher Ed
ISBN 13 : 1292038462
Total Pages : 619 pages
Book Rating : 4.2/5 (92 download)

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Book Synopsis Materials for Civil and Construction Engineers: Pearson New International Edition by : Michael S. Mamlouk

Download or read book Materials for Civil and Construction Engineers: Pearson New International Edition written by Michael S. Mamlouk and published by Pearson Higher Ed. This book was released on 2013-08-27 with total page 619 pages. Available in PDF, EPUB and Kindle. Book excerpt: For courses in Civil Engineering Materials, Construction Materials, and Construction Methods and Materials offered in Civil, Environmental, or Construction engineering departments. This introduction gives students a basic understanding of the material selection process and the behavior of materials — a fundamental requirement for all civil and construction engineers performing design, construction, and maintenance. The authors cover the various materials used by civil and construction engineers in one useful reference, limiting the vast amount of information available to the introductory level, concentrating on current practices, and extracting information that is relevant to the general education of civil and construction engineers. A large number of experiments, figures, sample problems, test methods, and homework problems gives students opportunity for practice and review.

Thermal Cracking in Concrete at Early Ages

Author : R. Springenschmid
Publisher : CRC Press
ISBN 13 : 9780419187103
Total Pages : 500 pages
Book Rating : 4.1/5 (871 download)

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Book Synopsis Thermal Cracking in Concrete at Early Ages by : R. Springenschmid

Download or read book Thermal Cracking in Concrete at Early Ages written by R. Springenschmid and published by CRC Press. This book was released on 1994-10-13 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: Restraint and intrinsic stresses in concrete at early ages are vitally important for concrete structures which must remain free of water-permeable cracks, such as water-retaining structures, tunnel linings, locks and dams. The development of hydration heat, stiffness and strength, also the degree of restraint and, especially for high-strength concrete, non-thermal effects, are decisive for sensitivity to cracking. Determining thses stresses in the laboratory and in construction components has led to a clearer understanding of how they develop and how to optimize mix design, temperature and curing conditions. New testing equipment has enabled the effects of all the important parameters to be qualified and more reliable models for predictiong restraint stresses to be developed. Thermal Cracking in Conrete at Early Ages contains 56 contributions by leading international specialists presented at the RILEM Symposium held in October 1994 at the Technical University of Munich. It will be valuable for construction and site engineers, concrete technologists and scientists.

Powerskin Conference

Author : Thomas Auer
Publisher :
ISBN 13 : 9789492516299
Total Pages : pages
Book Rating : 4.5/5 (162 download)

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Book Synopsis Powerskin Conference by : Thomas Auer

Download or read book Powerskin Conference written by Thomas Auer and published by . This book was released on 2016-12-28 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The PowerSkin Conference aims to address the role of building skinsto accomplish a carbon neutral building stock. Topics such as buildingoperation, embodied energy, energy generation and storage in context offacades, structure and environment are considered."

Engineered Cementitious Composites (ECC)

Author : Victor C. Li
Publisher : Springer
ISBN 13 : 3662584387
Total Pages : 419 pages
Book Rating : 4.6/5 (625 download)

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Book Synopsis Engineered Cementitious Composites (ECC) by : Victor C. Li

Download or read book Engineered Cementitious Composites (ECC) written by Victor C. Li and published by Springer. This book was released on 2019-04-30 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first book on Engineered Cementitious Composites (ECC), an advanced concrete material attracting world-wide attention in both the academic community and in industry. The book presents a comprehensive coverage of the material design methodology, processing methodology, mechanical and durability properties, smart functions, and application case studies. It combines effective use of illustrations, graphical data, and tables. It de-emphasizes mathematics in favor of physical understanding. The book serves as an introduction to the subject matter, or as a reference to those conducting research in ECC. It will also be valuable to engineers who need to quickly search for relevant information in a single comprehensive text.

Concrete Construction

Author : Akhtar Surahyo
Publisher : Springer
ISBN 13 : 3030105105
Total Pages : 320 pages
Book Rating : 4.0/5 (31 download)

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Book Synopsis Concrete Construction by : Akhtar Surahyo

Download or read book Concrete Construction written by Akhtar Surahyo and published by Springer. This book was released on 2019-03-05 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a thorough and comprehensive update of the 2002 edition, that incorporates detailed references to the Canadian, American, and British (European) standards, contextualized by the author based on over 30 years of construction experience. In addition to updates to the core text, many new topics are presented in the second edition, including a chapter discussing the methods for achieving quality control and ensuring quality assurance in concrete construction. The book consists of two parts. The first part provides basic information about normal concrete, its grades used on sites and various kinds of modified concretes such as fiber- reinforced concrete, sulphur concrete, roller compacted concrete, high performance concrete, ultra- high performance concrete, and flowing concrete. . It further addresses physical properties of concrete and various types of Portland cement, blended cements, admixtures, additives including properties of aggregates and their influence. The second part of the book highlights the principal causes of concrete deterioration along with protective measures, resulting from incorrect selection of constituent materials, poor construction methods, external factors, chemical attack, corrosion problems, hot and cold weather effects, and the various errors in designing and detailing. Featuring an extensive bibliography of the highly adopted standards as well as manuals and journals critical to the construction industry at the end of each chapter, the volume offers readers an advanced understanding of the theory and practical application of concrete technology and international standards in North America and Britain. Addresses concrete technology as well as concrete construction practices, meeting national and international standards; Maximizes readers' understanding of the principal causes of concrete deterioration along with protective measures; Facilitates readers' grasp of different nomenclature used for the same materials in different parts of the world; Features suitable tables, charts, and diagrams that illustrate and organize useful information; Explains sustainable concrete doctrine and how to achieve it meeting green concrete / building requirements; Provides a glossary, conversion factors, and examples of concrete mix design. ·

Mechanical Behavior of High Performance Concretes

Author :
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (359 download)

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Book Synopsis Mechanical Behavior of High Performance Concretes by :

Download or read book Mechanical Behavior of High Performance Concretes written by and published by . This book was released on 1993 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary report: This report presents a summary of each phase of a 4-year research program of the Strategic Highway Research Program (SHRP), which examined the mechanical behavior of high performance concretes. -- Production of high performance concrete: This report details the laboratory developmental work on producing high performance concrete for highway applications. -- Very early strength (VES)concrete: This report details the laboratory investigation of the mechanical behavior and field trials of high performance concrete for highway applications, and more specifically, VES concrete. -- High early strength (HES) concrete: The objective of this particular investigation is to obtain information on the mechanical behavior of HES concrete and to demonstrate its use under field conditions. -- Very high strength (VHS) concrete: The objective of this particular investigation is to obtain information on the mechanical behavior of VHS concrete. -- High early strength fiber reinforced concrete: This study provides an extensive data base and a summary of a comprehensive experimental investigation on the fresh state and mechanical properties of high early strength fiber reinforced concrete (HESFRC).

Autogenous Shrinkage of Concrete

Author : Ei-ichi Tazawa
Publisher : CRC Press
ISBN 13 : 9780419238904
Total Pages : 432 pages
Book Rating : 4.2/5 (389 download)

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Book Synopsis Autogenous Shrinkage of Concrete by : Ei-ichi Tazawa

Download or read book Autogenous Shrinkage of Concrete written by Ei-ichi Tazawa and published by CRC Press. This book was released on 1999-01-28 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book forms the proceedings of a workshop held in Hiroshima in June 1998 and derive from the work of a Technical Committee of the Japan Concrete Institute. Topics include test and prediction methods, the science of autogenous shrinkage, strain and stress, and consequent design concerns.

Machine Learning with R

Author : Brett Lantz
Publisher : Packt Publishing Ltd
ISBN 13 : 1782162151
Total Pages : 587 pages
Book Rating : 4.7/5 (821 download)

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Book Synopsis Machine Learning with R by : Brett Lantz

Download or read book Machine Learning with R written by Brett Lantz and published by Packt Publishing Ltd. This book was released on 2013-10-25 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written as a tutorial to explore and understand the power of R for machine learning. This practical guide that covers all of the need to know topics in a very systematic way. For each machine learning approach, each step in the process is detailed, from preparing the data for analysis to evaluating the results. These steps will build the knowledge you need to apply them to your own data science tasks.Intended for those who want to learn how to use R's machine learning capabilities and gain insight from your data. Perhaps you already know a bit about machine learning, but have never used R; or perhaps you know a little R but are new to machine learning. In either case, this book will get you up and running quickly. It would be helpful to have a bit of familiarity with basic programming concepts, but no prior experience is required.

Proceedings of Integrated Intelligence Enable Networks and Computing

Author : Krishan Kant Singh Mer
Publisher : Springer Nature
ISBN 13 : 981336307X
Total Pages : 975 pages
Book Rating : 4.8/5 (133 download)

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Book Synopsis Proceedings of Integrated Intelligence Enable Networks and Computing by : Krishan Kant Singh Mer

Download or read book Proceedings of Integrated Intelligence Enable Networks and Computing written by Krishan Kant Singh Mer and published by Springer Nature. This book was released on 2021-04-23 with total page 975 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents best selected research papers presented at the First International Conference on Integrated Intelligence Enable Networks and Computing (IIENC 2020), held from May 25 to May 27, 2020, at the Institute of Technology, Gopeshwar, India (Government Institute of Uttarakhand Government and affiliated to Uttarakhand Technical University). The book includes papers in the field of intelligent computing. The book covers the areas of machine learning and robotics, signal processing and Internet of things, big data and renewable energy sources.

The Rough Guide to Climate Change

Author : Robert Henson
Publisher : Rough Guides UK
ISBN 13 : 140538865X
Total Pages : 418 pages
Book Rating : 4.4/5 (53 download)

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Book Synopsis The Rough Guide to Climate Change by : Robert Henson

Download or read book The Rough Guide to Climate Change written by Robert Henson and published by Rough Guides UK. This book was released on 2011-05-02 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Rough Guide to Climate Change gives the complete picture of the single biggest issue facing the planet. Cutting a swathe through scientific research and political debate, this completely updated 3rd edition lays out the facts and assesses the options-global and personal-for dealing with the threat of a warming world. The guide looks at the evolution of our atmosphere over the last 4.5 billion years and what computer simulations of climate change reveal about our past, present and future. This updated edition includes scientific findings that have emerged since the 2007 report from the Intergovernmental Panel on Climate Change (IPCC), as well as background on recent controversies and an updated politics section that reflects post-Copenhagen developments. Discover how rising temperatures and sea levels, plus changes to extreme weather patterns, are already affecting life around the world. The Rough Guide to Climate Change unravels how governments, scientists and engineers plan to tackle the problem and includes information on what you can do to help.