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Early-age Thermal Crack Control in Concrete by P. B. Bamforth Pdf
This guide provides a method for estimating the magnitude of crack inducing strain and the risk of cracking; and where cracking will occur guidance is provided on the design of reinforcement to control crack widths.
Early-Age Thermal Crack Control in Concrete by T. A. Harrison Pdf
This book brings together the current knowledge on early-age therman cracking, which occurs when the restrained thermal contraction strain exceeds the tensile strain capacity of the concrete.
Control of Cracking in Reinforced Concrete Structures by Francis Barre,Philippe Bisch,Daniele Chauvel,Jacques Cortade,Jean-François Coste,Jean-Philippe Dubois,Silvano Erlicher,Etienne Gallitre,Pierre Labbé,Jacky Mazars,Claude Rospar,Alain Sellier,Jean-Michel Torrenti,François Toutlemonde Pdf
This book presents new guidelines for the control of cracking in massive reinforced and prestressed concrete structures. Understanding this behavior during construction allows engineers to ensure properties such as durability, reliability, and water- and air-tightness throughout a structure’s lifetime. Based on the findings of the French national CEOS.fr project, the authors extend existing engineering standards and codes to advance the measurement and prediction of cracking patterns. Various behaviors of concrete under load are explored within the chapters of the book. These include cracking of ties, beams and in walls, and the simulation and evaluation of cracking, shrinkage and creep. The authors propose new engineering rules for crack width and space assessment of cracking patterns, and provide recommendations for measurement devices and protocols. Intended as a reference for design and civil engineers working on construction projects, as well as to aid further work in the research community, applied examples are provided at the end of each chapter in the form of expanded measurement methods, calculations and commentary on models.
Cracking Control on Early-Age Concrete Through Internal Curing by Dejian Shen Pdf
This monograph is written based on the author's research on the assessment, control, and repair of cracking of early-age concrete in the recent decade. The technique of internal curing for increasing cracking resistance of early-age concrete is further developed through experimental and theoretical research. It establishes models for predicting the internal relative humidity and autogenous shrinkage of internally cured concrete at early age; reveals the variation law and mechanism of early-age tensile creep of internally cured concrete; and explores the variation law and mechanism of early-age cracking resistance of internally cured concrete under continuous restrained condition or uniaxial restrained condition. It is designed as a reference work for professionals or practitioners and a textbook for undergraduates or postgraduates. As such, this book provides valuable knowledge, useful methods, and practical experience that can be considered in the field of concrete cracking control.
Thermal Cracking in Concrete at Early Ages by R. Springenschmid Pdf
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.
Prevention of Thermal Cracking in Concrete at Early Ages by R. Springenschmid Pdf
An important new report from the RILEM Technical Committee 119. This book presents models and methods to determine thermal stresses and cracking risks in concrete. The possible influences on and causes of thermal cracking of concrete are discussed and cases of practical measures for avoiding cracking are detailed.
Control of Cracking in Early Age Concrete by H. Mihashi,Folker H. Wittmann Pdf
This volume contains a collection of peer-reviewed papers addressing durability and integrity of high-performance, high-strength and mass concrete by predicting and preventing the cracking due to thermal stresses and shrinkage at the early age.
Thermal Cracking of Massive Concrete Structures by Eduardo M.R. Fairbairn,Miguel Azenha Pdf
This book provides a State of the Art Report (STAR) produced by RILEM Technical Committee 254-CMS ‘Thermal Cracking of Mas-sive Concrete Structures’. Several recent developments related to the old problem of understanding/predicting stresses originated from the evolution of the hydration of concrete are at the origin of the creation this technical committee. Having identified a lack in the organization of up-to-date scientific and technological knowledge about cracking induced by hydration heat effects, this STAR aims to provide both practitioners and scientists with a deep integrated overview of consolidated knowledge, together with recent developments on this subject.
International RILEM Conference on Early-Age and Long-Term Cracking in RC Structures by Fragkoulis Kanavaris,Farid Benboudjema,Miguel Azenha Pdf
This volume gathers the latest advances, innovations and applications in the field of crack control in concrete, as presented by leading international researchers and engineers at the International RILEM Conference on Early-age and Long-term Cracking in RC Structures (CRC 2021), held in Paris, France on April 9, 2021. It covers early-age and long-term imposed deformations in concrete, analytical formulations for calculating crack widths in concrete, numerical simulations of early-age and long-term restrained behaviour of concrete elements, experimental investigations on cracking, on-site monitoring of imposed deformations and cracking, crack control and repair, and sustainability of design and remediation. The conference demonstrated that a comprehensive approach to this problem requires the design of robust experimental techniques, the development of multiscale models and the evaluation of code-based and other analytical approaches relevant to crack control in concrete. The contributions, which were selected through a rigorous international peer-review process, share exciting ideas that will spur novel research directions and foster new multidisciplinary collaborations.
Early-age Cracking Control on Modern Concrete by Dejian Shen Pdf
This monograph is written based on the author's extensive research over the last decade on the assessment and control of cracking of early-age concrete. The technique of crack control of modern concrete at early age is further developed through experimental and theoretical research, such as mitigating the drop of IRH, controlling the hydration process, decreasing the shrinkage, and increasing the tensile strength. It indicates the innovative findings and establishes prediction models on early-age internal relative humidity, autogenous shrinkage, tensile creep of modern concrete considering water-to-cement ratio, curing temperature., etc; reveals the variation law and mechanism of early-age cracking resistance of modern concrete with different kinds of fibers, supplementary cementitious materials, chemical admixtures, and internal curing agents under circumferential or uniaxial restrained condition. It is designed as a reference work for professionals or practitioners and a textbookfor undergraduates or postgraduates.
Report 25: Early Age Cracking in Cementitious Systems - Report of RILEM Technical committee TC 181-EAS: Early age cracking shrinkage induced stresses and cracking in cementitious systems by Arnon Bentur Pdf
Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, Two Volume Set by Tada-aki Tanabe,Kenji Sakata,Hirozo Mihashi,Ryoichi Sato,Kochi Maekawa,Hikaru Nakamura Pdf
CREEP, SHRINKAGE AND DURABILITY MECHANICS OF CONCRETE AND CONCRETE STRUCTURES contains the keynote lectures, technical reports and contributed papers presented at the Eighth International Conference on Creep, Shrinkage and Durability of Concrete and Concrete Structures (CONCREEP8, Ise-shima, Japan, 30 September - 2 October 2008). The topics covered