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Autogenous Shrinkage of Concrete

Autogenous Shrinkage of Concrete PDF Author: Ei-ichi Tazawa
Publisher: CRC Press
ISBN: 9780419238904
Category : Architecture
Languages : en
Pages : 432

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.

Autogenous Shrinkage of Concrete

Autogenous Shrinkage of Concrete PDF Author: Ei-ichi Tazawa
Publisher: CRC Press
ISBN: 9780419238904
Category : Architecture
Languages : en
Pages : 432

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.

Creep and Hygrothermal Effects in Concrete Structures

Creep and Hygrothermal Effects in Concrete Structures PDF Author: Zdeněk P. Bažant
Publisher: Springer
ISBN: 9402411380
Category : Technology & Engineering
Languages : en
Pages : 960

Book Description
This comprehensive treatise covers in detail practical methods of analysis as well as advanced mathematical models for structures highly sensitive to creep and shrinkage. Effective computational algorithms for century-long creep effects in structures, moisture diffusion and high temperature effects are presented. The main design codes and recommendations (including RILEM B3 and B4) are critically compared. Statistical uncertainty of century-long predictions is analyzed and its reduction by extrapolation is discussed, with emphasis on updating based on short-time tests and on long-term measurements on existing structures. Testing methods and the statistics of large randomly collected databases are critically appraised and improvements of predictions of multi-decade relaxation of prestressing steel, cyclic creep in bridges, cracking damage, etc., are demonstrated. Important research directions, such as nanomechanical and probabilistic modeling, are identified, and the need for separating the long-lasting autogenous shrinkage of modern concretes from the creep and drying shrinkage data and introducing it into practical prediction models is emphasized. All the results are derived mathematically and justified as much as possible by extensive test data. The theoretical background in linear viscoelasticity with aging is covered in detail. The didactic style makes the book suitable as a textbook. Everything is properly explained, step by step, with a wealth of application examples as well as simple illustrations of the basic phenomena which could alternate as homeworks or exams. The book is of interest to practicing engineers, researchers, educators and graduate students.

Early Age Autogenous Shrinkage of Concrete

Early Age Autogenous Shrinkage of Concrete PDF Author: Erika E. Holt
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 200

Book Description


Ultra-High Performance Concrete UHPC

Ultra-High Performance Concrete UHPC PDF Author: Ekkehard Fehling
Publisher: John Wiley & Sons
ISBN: 3433030871
Category : Technology & Engineering
Languages : en
Pages : 198

Book Description
Selected chapters from the German concrete yearbook are now being published in the new English "Beton-Kalender Series" for the benefit of an international audience. Since it was founded in 1906, the Ernst & Sohn "Beton-Kalender" has been supporting developments in reinforced and prestressed concrete. The aim was to publish a yearbook to reflect progress in "ferro-concrete" structures until - as the book's first editor, Fritz von Emperger (1862-1942), expressed it - the "tempestuous development" in this form of construction came to an end. However, the "Beton-Kalender" quickly became the chosen work of reference for civil and structural engineers, and apart from the years 1945-1950 has been published annually ever since. Ultra high performance concrete (UHPC) is a milestone in concrete technology and application. It permits the construction of both more slender and more durable concrete structures with a prolonged service life and thus improved sustainability. This book is a comprehensive overview of UHPC - from the principles behind its production and its mechanical properties to design and detailing aspects. The focus is on the material behaviour of steel fibre-reinforced UHPC. Numerical modelling and detailing of the connections with reinforced concrete elements are featured as well. Numerous examples worldwide - bridges, columns, facades and roofs - are the basis for additional explanations about the benefits of UHPC and how it helps to realise several architectural requirements. The authors are extensively involved in the testing, design, construction and monitoring of UHPC structures. What they provide here is therefore a unique synopsis of the state of the art with a view to practical applications.

Thermal Cracking in Concrete at Early Ages

Thermal Cracking in Concrete at Early Ages PDF Author: R. Springenschmid
Publisher: CRC Press
ISBN: 9780419187103
Category : Architecture
Languages : en
Pages : 500

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.

Concrete Mixture Proportioning

Concrete Mixture Proportioning PDF Author: Francois de Larrard
Publisher: CRC Press
ISBN: 9780419235002
Category : Architecture
Languages : en
Pages : 450

Book Description
The design of concrete mixes is becoming increasingly complex, with the addition of new materials in the compounds, such as organic admixtures, fibres and supplementary cementitious materials. Moreover, the list of properties which concretes are required to possess for certain applications has increased, and interest is developing in rheology, durability, deformability and whole-life behaviour. This book presents a number of simple models for the understanding of a concrete system, and provides the techniques for developing more sophisticated models for the practical design of concrete mixes.

Application of Super Absorbent Polymers (SAP) in Concrete Construction

Application of Super Absorbent Polymers (SAP) in Concrete Construction PDF Author: Viktor Mechtcherine
Publisher: Springer Science & Business Media
ISBN: 9400727321
Category : Technology & Engineering
Languages : en
Pages : 170

Book Description
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.

Development of Ultra-High Performance Concrete against Blasts

Development of Ultra-High Performance Concrete against Blasts PDF Author: Chengqing Wu
Publisher: Woodhead Publishing
ISBN: 0081024967
Category : Technology & Engineering
Languages : en
Pages : 424

Book Description
Development of Ultra-High Performance Concrete against Blasts: From Materials to Structures presents a detailed overview of UHPC development and its related applications in an era of rising terrorism around the world. Chapters present case studies on the novel development of the new generation of UHPC with nano additives. Field blast test results on reinforced concrete columns made with UHPC and UHPC filled double-skin tubes columns are also presented and compiled, as is the residual load-carrying capacities of blast-damaged structural members and the exceptional performance of novel UHPC materials that illustrate its potential in protective structural design. As a notable representative, ultra-high performance concrete (UHPC) has now been widely investigated by government agencies and universities. UHPC inherits many positive aspects of ultra-high strength concrete (UHSC) and is equipped with improved ductility as a result of fiber addition. These features make it an ideal construction material for bridge decks, storage halls, thin-wall shell structures, and other infrastructure because of its protective properties against seismic, impact and blast loads. - Focuses on the principles behind UHPC production, properties, design and detailing aspects - Presents a series of case studies and filed blast tests on columns and slabs - Focuses on applications and future developments

Pore Structure of Cement-Based Materials

Pore Structure of Cement-Based Materials PDF Author: Kalliopi K. Aligizaki
Publisher: CRC Press
ISBN: 9780419228004
Category : Science
Languages : en
Pages : 442

Book Description
Pore Structure of Cement-Based Materials provides a thorough treatment of the experimental techniques used to characterize the pore structure of materials. The text presents the principles and practical applications of the techniques used, organized in an easy-to-follow and uncomplicated manner, providing the theoretical background, the way to analyze experimental data, and the factors affecting the results. The book is the single comprehensive source of the techniques most commonly used for pore structure analysis, covering simple techniques like mercury intrusion porosimetry and water absorption, to the more sophisticated small-angle scattering and nuclear magnetic resonance. The book is an essential reference text for researchers, users, and students in materials science, applied physics, and civil engineering, who seek a deep understanding of the principles and limitations of the techniques used for pore structure analysis of cement-based materials.

Design and Control of Concrete Mixtures

Design and Control of Concrete Mixtures PDF Author: Steven H. Kosmatka
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 224

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