Multi-scale Investigation of Tensile Creep of Ultra-high Performance Concrete for Bridge Applications PDF Download

Author: Victor Youssef Garas Yanni
Publisher:
ISBN: 9781109622881
Category : Concrete
Languages : en
Pages : 267

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Book Description
There is a specific interest in using UHPC for precast prestressed bridge girders because it has the potential to reduce maintenance costs associated with steel and conventional concrete girders, replace functionally obsolete or structurally deficient steel girders without increasing the weight or the depth of the girder, and increase bridge durability to between 75 and 100 years. UHPC girder construction differs from that of conventional reinforced concrete in that UHPC may not need transverse reinforcement due to the high tensile and shear strengths of the material. Before bridge designers specify such girders without using shear reinforcement, the long-term tensile performance of the material must be characterized.

Author: Caijun Shi
Publisher: CRC Press
ISBN: 100383471X
Category : Technology & Engineering
Languages : en
Pages : 505

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Book Description
Ultra-high performance concrete (UHPC) is an advanced cement-based composite material with compressive strength of over 120 MPa, high toughness, and superior durability. Since its development in the early 1990s, UHPC has attracted great interest worldwide due to its advantages. This book covers material selection and mixture design methods for developing UHPC, as well as the performance of UHPC, including fresh and hardened properties, setting and hardening, dimensional stability, static and dynamic properties, durability, long-term properties, and self-healing properties. A range of potential applications and case studies are presented to illustrate how UHPC meets requirements for lightweight, high-rise, large-span, heavy-load bearing, fast-construction, and highly durable structures in civil and construction engineering. Also introduced is a typical new concrete, seawater sea-sand UHPC, which avoids the use of freshwater and river sand in marine construction. The first book to fully cover the design, performance, and applications of UHPC, this is ideal for concrete technologists, designers, contractors, and researchers.

Author: Pedro Serna
Publisher: Springer
ISBN: 9402410015
Category : Technology & Engineering
Languages : en
Pages : 244

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Book Description
This is the first publication ever focusing strictly on the creep behaviour in cracked sections of Fibre Reinforced Concrete (FRC). These proceedings contain the latest scientific papers about new testing methodologies, results and conclusions of multiple experimental campaigns and recommendations about significant factors of long-term behaviour, experiences from more than ten years of creep testing and some reflections about future perspectives on this topic. This book is an essential reference for all researchers of creep behaviour on FRC. This volume is the result of the efforts of the RILEM TC 261-CCF, that has been working since 2014 to develop standardized methodologies and guidelines to compare results from different laboratories and get a better understanding of the significant parameters related to creep of FRC.

Author: Fernando Pacheco-Torgal
Publisher: Woodhead Publishing
ISBN: 0081026420
Category : Technology & Engineering
Languages : en
Pages : 896

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Book Description
Covering the latest technologies, Nanotechnology in eco-efficient construction provides an authoritative guide to the role of nanotechnology in the development of eco-efficient construction materials and sustainable construction. The book contains a special focus on applications concerning concrete and cement, as nanotechnology is driving significant development in concrete technologies. The new edition has 14 new chapters, including 3 new parts: Mortars and concrete related applications; Applications for pavements and other structural materials; and Toxicity, safety handling and environmental impacts. Civil engineers requiring an understanding of eco-efficient construction materials, as well as researchers and architects within any field of nanotechnology, eco-efficient materials or the construction industry will find this updated reference to be highly valuable. Addresses issues such as toxicity and LCA aspects New chapters covering safety handling on occupational exposure of nanoparticles and the assessment of personal exposure to airborne nanomaterials Discusses the effects of adding nano-particles on the durability and on the properties of geopolymers

Author: Masayasu Ohtsu
Publisher: Woodhead Publishing
ISBN: 0128235144
Category : Technology & Engineering
Languages : en
Pages : 332

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Book Description
Acoustic Emission and Related Non-destructive Evaluation Techniques in the Fracture Mechanics of Concrete: Fundamentals and Applications, Second Edition presents innovative Acoustic Emission (AE) and related non-destructive evaluation (NDE) techniques that are used for damage detection and inspection of aged and deteriorated concrete structures. This new edition includes multi-modal applications such as DIC, thermography, X-ray and in-situ implementations, all of which are helpful in better understanding feasibility and underlying challenges. This new edition is an essential resource for civil engineers, contractors working in construction, and materials scientists working both in industry and academia. Completely updated, with a new chapter on multi-technique damage monitoring Presents new applications and novel technologies on AE and related NDT in the fracture mechanics of concrete Features contributions from recognized world-leaders in the application of acoustic emission (AE) and NDE techniques used for the damage assessment of concrete and concrete structures

Author: Victor Y. Garas
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 9

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Book Description
This paper describes the development and use of a high cost and space efficient tensile creep test setup for cement-based materials. This test setup features a load capacity of 6800 kg (15 000 lb), capacity for three specimens in series, and the ability to measure deformations at four points for each specimen with an accuracy of 10 micro-strains. This newly developed test setup allowed testing the long-term tensile creep of ultra-high performance concrete (UHPC) for the first time. In the experimental study, steel fiber-reinforced UHPC prisms were subjected to tensile creep to investigate the effect of different thermal treatment conditions on their viscoelastic response over a 1-year period. Results from the experimental study showed the necessity to perform tensile creep tests rather that direct tensile strength tests to predict the long-term tensile performance of UHPC. These results show that the quality of the bond between the fibers and cementitious paste was better evaluated using tensile creep than direct tension tests. Experimental results showed that specific tensile creep of UHPC decreased between 63 % and 69 % when thermal treatment of 60°C (140°F) for 72 h or of 90°C (194°F) for 48 h was applied, respectively, prior to loading. Results from this study also point to the necessity of having a standard tensile creep test similar to the currently existing compressive creep standard, especially if the tensile capacity of concrete is considered in structural design.

Author: Heiko Herrmann
Publisher: Springer
ISBN: 3030008681
Category : Technology & Engineering
Languages : en
Pages : 139

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Book Description
This volume shines a new light on short fibre reinfoced cementitious composites and particle reinforced ceramics. It offers insight from various disciplines like civil engineering, material sciences and micro-mechanics, and collects 9 experimental, numerical and theoretical studies written by top researchers in composite concrete science. The book presents the outcome of the EUROMECH 582 colloquium “Short Fibre Reinfoced Cementitious Composites and Ceramics” held 20 – 22 March 2017, Tallinn, Estonia.

Author: Yingjie Liang
Publisher: Walter de Gruyter GmbH & Co KG
ISBN: 3110608529
Category : Mathematics
Languages : en
Pages : 146

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Book Description
This book introduces the fundamental concepts, methods, and applications of Hausdorff calculus, with a focus on its applications in fractal systems. Topics such as the Hausdorff diffusion equation, Hausdorff radial basis function, Hausdorff derivative nonlinear systems, PDE modeling, statistics on fractals, etc. are discussed in detail. It is an essential reference for researchers in mathematics, physics, geomechanics, and mechanics.

Author: Xudong Shao
Publisher: Elsevier
ISBN: 0443158665
Category : Technology & Engineering
Languages : en
Pages : 976

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Book Description
Innovative Bridge Structures Based on Ultra-High Performance Concrete (UHPC): Theory, Experiments and Applications introduces more than a dozen innovative bridge structures and engineering applications developed by the author's team based on UHPC. As the new bridge structure developed by UHPC can make outstanding contributions to the realization of the "carbon peaking and carbon neutrality goals" and "sustainable development," and since recent studies have shown that the application of UHPC is expected to greatly reduce the amount of materials and carbon emissions and prolong the life of the structure, this book is an ideal update on the topic. For example, after calculation, when UHPC is applied to the arch bridge with compression as the main stress characteristic, compared with the steel arch bridge, the dead weight of the UHPC arch bridge is basically the same, and the cost and carbon emission are only 34% and 20% of the latter. Ultra-high performance concrete (UHPC) as a new generation of civil structural materials has the characteristics of high strength, high toughness and high durability. Through the collaborative innovation of new materials and new structures, the application of UHPC in bridge engineering is expected to achieve the goal of economical, environmentally-friendly, durable and high performance of the main structure. Teachers readers about the new structures and technologies in bridge engineering developed by the author's team based on UHPC Provides relevant experimental studies and the mechanical properties of different UHPC structures Helps users understand the design method and calculation theory of UHPC bridge structures Covers the characteristics and advantages of new UHPC structures and technologies applied to engineering

Author: Mauricio Lopez
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages :

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Book Description
This multi-scale investigation aimed to provide new knowledge and understanding of creep and shrinkage of high performance lightweight concrete (HPLC) by assessing prestress losses in HPLC prestressed members in a large-scale study; by quantifying the effect of the constituent materials and external conditions on creep and shrinkage in a medium-scale study; and by improving the fundamental understanding of creep and shrinkage in a small-scale study. Creep plus shrinkage prestress losses were between two and eight times lower than those estimated for the design standards and approximately 50% of those measured in similar strength normal weight high performance concrete girders. The lower creep and shrinkage exhibited by HPLC was found to be caused by a synergy between the pre-soaked lightweight aggregate and the low water-to-cementitious material ratio matrix. That is, the water contained in the lightweight aggregate contributes to enhance hydration by providing an internal moist curing. The water in the aggregate also contributes to maintain a high internal relative humidity which reduces or eliminates autogenous shrinkage. This higher internal relative humidity also reduces creep by preventing load-induced water migration. Finally, lightweight aggregate exhibits a better elastic compatibility with the paste than normal weight aggregate. This improved elastic matching and the enhanced hydration are believed to reduce peak deformations at the ITZ which further decreases creep and shrinkage.