Early Age Autogenous Shrinkage of Concrete PDF Download

Author: Erika E. Holt
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 200

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Author: Ei-ichi Tazawa
Publisher: CRC Press
ISBN: 9780419238904
Category : Architecture
Languages : en
Pages : 432

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Book Description
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.

Author: R. Springenschmid
Publisher: CRC Press
ISBN: 9780419187103
Category : Architecture
Languages : en
Pages : 500

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Book Description
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.

Author: Tada-aki Tanabe
Publisher: CRC Press
ISBN: 0203882954
Category : Technology & Engineering
Languages : en
Pages : 1552

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Book Description
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

Author: Viktor Mechtcherine
Publisher: Springer Science & Business Media
ISBN: 9400727321
Category : Technology & Engineering
Languages : en
Pages : 170

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This is the state-of-the-art report prepared by the RILEM TC “Application of Super Absorbent Polymers (SAP) in concrete construction”. It gives a comprehensive overview of the properties of SAP, specific water absorption and desorption behaviour of SAP in fresh and hardening concrete, effects of the SAP addition on rheological properties of fresh concrete, changes of cement paste microstructure and mechanical properties of concrete. Furthermore, the key advantages of using SAP are described in detail: the ability of this material to act as an internal curing agent to mitigate autogenous shrinkage of high-performance concrete, the possibility to use SAP as an alternative to air-entrainment agents in order to increase the frost resistance of concrete, and finally, the benefit of steering the rheology of fresh cement-based materials. The final chapter describes the first existing and numerous prospective applications for this new concrete additive.

Author: Robert G. Shogren
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 264

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Author: Ei-ichi Tazawa
Publisher: CRC Press
ISBN: 1482272121
Category : Architecture
Languages : en
Pages : 424

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Book Description
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.

Author: Steven H. Kosmatka
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 224

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Book Description
Portland Cement Association reference, dealing with fundamentals, cold weather concreting, curing, admixtures, aggregates, mixing, and much more.

Author: Jiayin Tao
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 17

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Book Description
Autogenous shrinkage caused by the self-desiccation of cement-based materials at early age requires more attention from researchers because it can increase the risk of cracking in concrete. This article presents the relationships among autogenous shrinkage after final setting, the estimated effective capillary stress, and electrical resistivity of cement pastes. Autogenous shrinkage, internal relative humidity, chemical shrinkage, and electrical resistivity were measured for the plain cement paste that had water to cement ratios (W/C) of 0.3, 0.35, and 0.4 at early age. Electrical resistivity and its rate curve were presented to analyze the influence of W/C on the hydration process. A fitting function containing W/C, electrical resistivity, and three constant parameters was put forward to quantify the relationship between autogenous shrinkage and electrical resistivity. The autogenous shrinkage of cement paste at different ages can be predicted by the resistivity at 24 h; the relationship between electrical resistivity at 24 h and the effective capillary stress S.?cap at 24 h, 48 h, 72 h, and 96 h was also established to support the effectiveness of relating the self-desiccation development trend and electrical property of cement paste. This study introduces innovative and quick methods to estimate the autogenous shrinkage of cement paste by electrical resistivity.

Author: P. B. Bamforth
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 116

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Book Description
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.