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Author: Jared Earl Brewe
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 424
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Book Description
"The dissertation presented here discusses research to develop improved methods of material selection for the production of high-performance concrete and to examine the behavior of these materials in structural applications. The results of the research have been submitted for publication in five conference proceedings and technical journals. The first paper investigates a particle packing model for determination of the optimal proportions of materials for high performance concrete. Since concrete with higher strength and durability will have a higher packing density, this research used particle packing to optimize a mix to achieve the maximum density. The model was used to produce high-strength concrete with a reduced amount of cement. The second paper studies the shrinkage behavior of high-strength concrete subjected to accelerated curing. It shows that shrinkage is reduced with increasing curing temperatures and presents correction factors for current prediction equations. The third and fourth papers, published as a two-part series, examine the behavior of prestressed concrete girders produced with self-consolidating concrete and subjected to elevated compressive fiber stress levels. Members were monitored to examine the prestress loss behavior and the camber development over time, then tested to failure for prediction comparison. Flexural behavior was predicted with relative accuracy, but the shear behavior showed the need for additional test data. The final paper examines the effect of reduced concrete elastic modulus values on the performance of prestressed concrete girders. At maximum span lengths, the increase in live load deflection over allowable limits is reason for concern when reduced elastic modulus values are found"--Abstract, leaf iv.
Author: Jared Earl Brewe
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 424
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Book Description
"The dissertation presented here discusses research to develop improved methods of material selection for the production of high-performance concrete and to examine the behavior of these materials in structural applications. The results of the research have been submitted for publication in five conference proceedings and technical journals. The first paper investigates a particle packing model for determination of the optimal proportions of materials for high performance concrete. Since concrete with higher strength and durability will have a higher packing density, this research used particle packing to optimize a mix to achieve the maximum density. The model was used to produce high-strength concrete with a reduced amount of cement. The second paper studies the shrinkage behavior of high-strength concrete subjected to accelerated curing. It shows that shrinkage is reduced with increasing curing temperatures and presents correction factors for current prediction equations. The third and fourth papers, published as a two-part series, examine the behavior of prestressed concrete girders produced with self-consolidating concrete and subjected to elevated compressive fiber stress levels. Members were monitored to examine the prestress loss behavior and the camber development over time, then tested to failure for prediction comparison. Flexural behavior was predicted with relative accuracy, but the shear behavior showed the need for additional test data. The final paper examines the effect of reduced concrete elastic modulus values on the performance of prestressed concrete girders. At maximum span lengths, the increase in live load deflection over allowable limits is reason for concern when reduced elastic modulus values are found"--Abstract, leaf iv.
Author: Y. Malier
Publisher: CRC Press
ISBN: 135144090X
Category : Architecture
Languages : en
Pages : 567
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Book Description
Provides a thorough review of properties, durability and use of high performance concrete, derived from recent research and experience. This book contains contributions from the leading French, Canadian and Swiss researchers, designers and material specialists, translated into English for the first time.
Author: fib Fédération internationale du béton
Publisher: fib Fédération internationale du béton
ISBN: 2883940827
Category : Technology & Engineering
Languages : en
Pages : 134
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Book Description
High Strength/High Performance Concrete (HSC/HPC) continues to be the object of particular interest and extensive research, and its use in construction is increasing continuously. fib Bulletin 42 summarises the available information on the material behaviour of HSC/HPC, and develops a set of code-type constitutive relations as an extension of CEB-FIP Model Code 1990. Literature on experimental data and international guidelines, standards and recommendations were reviewed, and already-existing constitutive relations and models were evaluated. In addition to a number of material laws chosen and adjusted for this report, some new constitutive relations were developed based on the collected data. The criteria for the choice of the existing relations as well as the development of the new constitutive relations involved their simplicity and operationality (code-type mathematical formulations). Furthermore, they had to be physically sound and if possible describe the behaviour of both high-performance and normal strength concretes by a unique relation. Finally, compliance with the specifications given in the CEB-FIP Model Code 1990 was examined. This State-of-art report is intended for engineers and represents a summary of the relevant knowledge available to and possessed by the members of the Task Group at the time of its drafting.
Author: Pierre Pimienta
Publisher: Springer
ISBN: 3319954326
Category : Technology & Engineering
Languages : en
Pages : 152
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Book Description
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.
Author: Ekkehard Fehling
Publisher: John Wiley & Sons
ISBN: 3433030871
Category : Technology & Engineering
Languages : en
Pages : 198
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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.
Author: Jacques Resplendino
Publisher: John Wiley & Sons
ISBN: 1118587553
Category : Technology & Engineering
Languages : en
Pages : 678
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Book Description
This book contains the proceedings of the international workshop “Designing and Building with Ultra-High Performance Fibre-Reinforced Concrete (UHPFRC): State of the Art and Development”, organized by AFGC, the French Association for Civil Engineering and French branch of fib, in Marseille (France), November 17-18, 2009. This workshop was focused on the experience of a lot of recent UHPFRC realizations. Through more than 50 papers, this book details the experience of many countries in UHPFRC construction and design, including projects from Japan, Germany, Australia, Austria, USA, Denmark, the Netherlands, Canada... and France. The projects are categorized as novel architectural solutions, new frontiers for bridges, new equipments and structural components, and extending the service life of structures. The last part presents major research results, durability and sustainability aspects, and the updated AFGC Recommendations on UHPFRC.
Author: Insert Name Here
Publisher: kassel university press GmbH
ISBN: 3862192644
Category : Concrete
Languages : en
Pages : 1059
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Book Description
Author: Chengqing Wu
Publisher: Woodhead Publishing
ISBN: 0081024967
Category : Technology & Engineering
Languages : en
Pages : 424
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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
Author: Georgios Gaganelis
Publisher: John Wiley & Sons
ISBN: 3433610703
Category : Technology & Engineering
Languages : en
Pages : 278
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Book Description
Optimierungsgestütztes Entwerfen und Bemessen liefert neuartige Methoden, bewehrten Beton besonders effizient einzusetzen. Dabei wird die mathematische Optimierung auf die praktischen Probleme des Betonbaus angewendet. Ziel ist es, sparsam mit dem weltweit meistverwandten Baustoff Stahlbeton umzugehen und damit den CO2-Ausstoß aus der Zement- und Stahlherstellung und den Ressourcenverbrauch an Kies, Sand und Wasser substanziell zu reduzieren. Drei Themenbereiche sind angesprochen. Erstens, die Strukturfindung, also die Frage nach der richtigen äußeren Form, dass schlanke, nach dem Kraftfluss ausgerichtete Tragwerke entstehen. Baustoffgerecht sind sie weitgehend auf Druck beansprucht. Zweitens, die Bewehrungsführung, die sich am inneren Kraftfluss orientiert. Vorteile ergeben sich gerade für Scheiben, volumenartige Bauteile, an Lasteinleitungsbereichen und Aussparungen. Es entstehen anschauliche, direkt in Bewehrungen umsetzbare Fachwerkmodelle. Dritter Entwicklungsschritt ist die Behandlung von Querschnitten. Sie werden in ihrer Form optimiert und in ihrer Bewehrung bemessen. Dies gilt auch für anspruchsvolle Beanspruchungen (zweiachsige Biegung) und nahezu beliebige Formen. Eine Parametrisierung ermöglicht die allgemeingültige Übertragung auf ganze Klassen von Querschnitten. Die optimierungsgestützten Methoden werden vertieft und anschaulich beschrieben. Sie sind universell anwendbar und unabhängig von Normen, Betonarten und Bewehrungen. Sie gelten für normalfeste bis zu ultrahochfesten Betonen, für Bewehrungen aus Stahl, Carbon oder Glasfasern und für Bewehrungsstäbe als auch -fasern. Zahlreiche Abbildungen und Berechnungsbeispiele verdeutlichen die Anwendung. Zudem werden praktische Umsetzungen vorgestellt, darunter ultra-leichte Stahl-Beton-Balken, schlanke Solarkollektoren aus Beton und verbesserte Bewehrungslayouts für Tunnelschalen. Das Buch richtet sich gleichermaßen an Studierende, Forscher und Praktiker.
Author:
Publisher:
ISBN:
Category : Concrete bridges
Languages : en
Pages : 260
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Book Description
