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A Model For Chloride Penetration In Concrete
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Book Synopsis Resistance of Concrete to Chloride Ingress by : Luping Tang
Download or read book Resistance of Concrete to Chloride Ingress written by Luping Tang and published by CRC Press. This book was released on 2011-10-06 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chloride ingress in reinforced concrete induces corrosion and consequent spilling and structural weakness, and it occurs world-wide and imposes an enormous cost. Yet it can be resisted by using test methods and relevant models for service life prediction.Resistance of Concrete to Chloride Ingress sets out current understanding of chloride transport
Book Synopsis PRO 38: 3rd International RILEM Workshop on Testing and Modelling the Chloride Ingress into Concrete by : Carmen Andrade
Download or read book PRO 38: 3rd International RILEM Workshop on Testing and Modelling the Chloride Ingress into Concrete written by Carmen Andrade and published by RILEM Publications. This book was released on 2004 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transport and Interactions of Chlorides in Cement-based Materials by : Caijun Shi
Download or read book Transport and Interactions of Chlorides in Cement-based Materials written by Caijun Shi and published by CRC Press. This book was released on 2019-07-26 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chloride-induced corrosion is the most important durability issue of reinforced concrete structures, and the prediction and prevention of chloride-induced corrosion has attracted considerable interest all over the world. Given that chloride penetrates through the concrete cover, the issues concerning its transport are crucial. These include testing methods, prediction, and the prevention of ingress. During the transport process, physical and chemical interaction occurs between chloride and cement hydrates, which in turn affects the further transport, so the transport of chloride and these interactions are closely related and underpin our understanding of chloride-induced corrosion in RC structures. This book provides in-depth discussion of chloride transport and its interaction in cement-based materials, and reviews and summarizes the state of the art. The mechanisms and testing methods for chloride transport, chemical interactions of chloride with cement hydrates, chloride binding isotherms, measurement of penetration depths, factors affecting chloride transport, and modeling of chloride transport are discussed in detail. This book serves as a reference for researchers or engineer, and a textbook for graduate students.
Book Synopsis Modeling of Chloride Penetration Into Concrete Structures Under Flexural Cyclic Load and Tidal Environment by :
Download or read book Modeling of Chloride Penetration Into Concrete Structures Under Flexural Cyclic Load and Tidal Environment written by and published by . This book was released on 2008 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: In marine environment, the deterioration of concrete structures is mainly due to chloride induced corrosion. With real concrete structures, the deterioration is controlled by the combination of mechanical load and climatic load. The mechanical load results cracks in concrete structures. The cracks accelerate the chloride penetration into concrete structures. As a result, the service life of concrete structures will be reduced considerably. There were many models proposed to predict the deterioration of concrete structures. However, these models are not reliable due to not having simultaneous combination of mechanical and climatic loads. In this research, a model, which simulates the chloride ingress into plain concrete, using different cement types, under flexural cyclic load and tidal environment, was proposed. This model is based on theoretical analysis and experiments of chloride diffusion test, chloride content test and flexural cyclic loading test. Flexural cyclic load is applied from 50% to 80% of to ultimate bending load. Fictitious crack model is adopted to predict fatigue crack growth of plain concrete beam under flexural fatigue. Experimental results show the linear relation between results of short-term and long-term test of chloride diffusion coefficient. Of the four common cement types, Ordinary Portland cement is the best cement type using for concretes in term of the chloride induced corrosion resistance because of the highest capacity to bind chloride ions. The proposed model shows that the flexural cyclic load accelerates chloride penetration into concrete. The higher the flexural load level, SR, the faster chloride penetration occurred. The model predictions fit well with experimental results when the crack density parameter, and the tortuosity parameter, are introduced.
Book Synopsis A Model For Chloride Penetration In Concrete by : H'mida Hamidane
Download or read book A Model For Chloride Penetration In Concrete written by H'mida Hamidane and published by LAP Lambert Academic Publishing. This book was released on 2013 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major durability problem facing concrete structures in cold and marine regions is the corrosion of the reinforcing steel, mainly caused by chloride penetration, which results in the loss of structural integrity or even bearing capacity and subsequently collapse. A method for predicting the chloride ingress into concrete structures, which is the first and main phase of chloride induced reinforcement corrosion, is developed. It couples the problems of heat transfer, moisture transport, chloride diffusion and convection.The model is based on a multiscale two dimensional nonlinear time dependent finite element method. The model is capable of reproducing, with good precision, available test data
Book Synopsis International Review of Chloride Ingress Into Structural Concrete by : P. B. Bamforth
Download or read book International Review of Chloride Ingress Into Structural Concrete written by P. B. Bamforth and published by Thomas Telford. This book was released on 1997-04-10 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: The deterioration of reinforced and prestressed concrete structures resulting from the corrosion of the steel reinforcement is a worldwide problem. As long as salt is used for de-icing or structures are built near the coast, chloride will continue to be a primary factor in compromising the durability of a structure. This report deals specifically with the ingress of salt from the environment, which can lead to severe corrosion of reinforcement. It reviews the international state-of-the-art with regard to chloride ingress into concrete and, in particular, considers: - The influence of concreting materials, mix design, curing and environment - methods for the detection of chloride ingress in structures - techniques used for studying chloride ingress
Book Synopsis PRO 19: 2nd International RILEM Workshop on Testing and Modelling the Chloride Ingress into Concrete by : Carmen Andrade
Download or read book PRO 19: 2nd International RILEM Workshop on Testing and Modelling the Chloride Ingress into Concrete written by Carmen Andrade and published by RILEM Publications. This book was released on 2001 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis PRO 2: International RILEM Workshop on Chloride Penetration into Concrete by : Lars-Olof Nilsson
Download or read book PRO 2: International RILEM Workshop on Chloride Penetration into Concrete written by Lars-Olof Nilsson and published by . This book was released on 1997 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Diffusion of Chloride in Concrete by : E. Poulsen
Download or read book Diffusion of Chloride in Concrete written by E. Poulsen and published by CRC Press. This book was released on 2014-04-21 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the most comprehensive and flexible theory of chloride ingress in concrete to date. Based on test results and field observations, the book demonstrates the easy application of this theory to practice. The information is presented in a clear style with each chapter containing an introduction, technical applications and examples, and a f
Book Synopsis Benchmarking Chloride Ingress Models on Real-life Case Studies—Marine Submerged and Road Sprayed Concrete Structures by : Eddie Koenders
Download or read book Benchmarking Chloride Ingress Models on Real-life Case Studies—Marine Submerged and Road Sprayed Concrete Structures written by Eddie Koenders and published by Springer Nature. This book was released on 2022-04-10 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the work of RILEM Technical Committee 270-CIM: Benchmarking Chloride Ingress Models on Real-life Case Studies - Theory and Practice. It provides a comparative benchmark analysis of various types of chloride ingress models with emphasis on short, medium and long-term predictions. The book is subdivided in five chapters. The first chapter is an introduction on the benchmark and selected cases. The second chapter reports theoretical backgrounds of various analytical and numerical models for chloride ingress, followed by a short description of the models employed in the benchmark analysis. Chapter three describes the benchmark results of the Marine Submerged case, and chapter 4 of the Road Sprayed case. The last chapter reports conclusions, guidelines for calibration and recommendations. The book will benefit academics, designers, engineers, consultants, but also asset owners and standardization committees interested in durability and service life assessment of concrete structures.
Book Synopsis Second RILEM International Conference on Concrete and Digital Fabrication by : Freek P. Bos
Download or read book Second RILEM International Conference on Concrete and Digital Fabrication written by Freek P. Bos and published by Springer Nature. This book was released on 2020-07-08 with total page 1209 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers peer-reviewed contributions presented at the 2nd RILEM International Conference on Concrete and Digital Fabrication (Digital Concrete), held online and hosted by the Eindhoven University of Technology, the Netherlands from 6-9 July 2020. Focusing on additive and automated manufacturing technologies for the fabrication of cementitious construction materials, such as 3D concrete printing, powder bed printing, and shotcrete 3D printing, the papers highlight the latest findings in this fast-growing field, addressing topics like mixture design, admixtures, rheology and fresh-state behavior, alternative materials, microstructure, cold joints & interfaces, mechanical performance, reinforcement, structural engineering, durability and sustainability, automation and industrialization.
Author :FIB – International Federation for Structural Concrete Publisher :FIB - International Federation for Structural Concrete ISBN 13 :0907862055 Total Pages :18 pages Book Rating :4.9/5 (78 download)
Book Synopsis Cover to steel reinforcement for floating concrete structures by : FIB – International Federation for Structural Concrete
Download or read book Cover to steel reinforcement for floating concrete structures written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 1982-03-01 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Penetration of Chloride in Concrete Subject to Wetting and Drying by : S. Bioubakhsh
Download or read book The Penetration of Chloride in Concrete Subject to Wetting and Drying written by S. Bioubakhsh and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of reinforcing steel arising from contamination by chlorides from de-icing salt is the major cause of deterioration of concrete bridges in the UK and many parts of the world. Those elements of structures exposed to cyclic wetting and drying (BS 8500-1, XD3) have proven to be the most vulnerable to corrosion damage. Penetration of chloride in concrete exposed to wet/dry environments occurs by diffusion and absorption. Diffusion is a relatively slow and quite well understood process. However, absorption is a relatively rapid transport mechanism and there is a lack of understanding of the role of this mechanism on chloride ingress as studies on chloride penetration in concrete exposed to wet/dry cycles ignore the effect of this mechanism on chloride ingress. In addition, chloride penetration prediction models are mostly based on Fick's laws of diffusion, ignoring the effect of absorption on chloride ingress. The aims of this work are: to develop a more detailed understanding of chloride penetration in concrete subjected to wet/dry cycles and identify the effect of absorption on chloride ingress; to produce reliable numerical model for chloride penetration due to this transport process; to recommend values of the minimum thickness of concrete cover to steel reinforcement relevant to this service environment or identify exposure conditions which require alternative methods of protection. The absorption test method used in this work is a cyclic regime as developed by TRL [Emerson and Butler, 1997] to represent site conditions. Concrete cubes, 100 mm3, were subjected to wet/dry cycles with the suction surface in contact with NaCl solution. Drying temperature was found to be the most critical factor influencing sorptivity and depth of chloride penetration. The salt solution concentration also had a significant effect on chloride penetration via the apparent surface chloride content. Moreover, the depth of chloride penetration was found to be proportional to the square root of exposure time. Two approaches to predict chloride penetration in concrete exposed to wet/dry cycling are proposed. The first is based on the relationship obtained in the present study between equilibrium sorptivity of concrete, Se, depth of chloride penetration, d, and time, t, which leads to the following general expression, where A, B and C are constants for a given cement type and salt solution concentration d = A×√t + B×Se + C The second method is simply based on the well known solution of Fick's second law but utilises values of apparent diffusion coefficient appropriate to this transport process. The first model suggests that, initially, absorption has a significant effect on chloride ingress but that diffusion dominates long-term behaviour. The outputs from these models suggest that the thicknesses of concrete cover in structures exposed to class XD3 should be higher than those currently recommended in BS 8500-1 (2006). However, there are practical limits as to what can be specified for thickness of concrete cover and therefore alternative methods of protection such as coatings or cathodic protection should be adopted when the concrete cover does not provide sufficient protection.
Book Synopsis Corrosion Rates of Steel in Concrete by : Neal Steven Berke
Download or read book Corrosion Rates of Steel in Concrete written by Neal Steven Berke and published by ASTM International. This book was released on 1990 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Permeability of Concrete by : David Whiting
Download or read book Permeability of Concrete written by David Whiting and published by . This book was released on 1988 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Modeling Concrete Service Life by : Carmen Andrade
Download or read book Advances in Modeling Concrete Service Life written by Carmen Andrade and published by Springer Science & Business Media. This book was released on 2011-11-23 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, a critical analysis is made on service life models related to reinforcement corrosion. The contributors are on the frontier of knowledge in the field of durability of reinforced concrete. Topics covered in the book include: causes and mechanisms of deterioration, transport mechanisms in concrete, numerical modeling of concrete behavior, durability modeling and prediction, reliability approach to structural design for durability, structural behavior following degradation of concrete structures, deterioration and repair of concrete structures, and corrosion measurement techniques.
Author :fib Fédération internationale du béton Publisher :fib Fédération internationale du béton ISBN 13 :9782883940741 Total Pages :128 pages Book Rating :4.9/5 (47 download)
Book Synopsis Model Code for Service Life Design by : fib Fédération internationale du béton
Download or read book Model Code for Service Life Design written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2006-01-01 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: fib Bulletin 34 addresses Service Life Design (SLD) for plain concrete, reinforced concrete and pre-stressed concrete structures, with a special focus on design provisions for managing the adverse effects of degradation. Its objective is to identify agreed durability related models and to prepare the framework for standardization of performance based design approaches. Four different options for SLD are given: - a full probabilistic approach, - a semi probabilistic approach (partial factor design), - deemed to satisfy rules, - avoidance of deterioration. The service life design approaches described in this document may be applied for the design of new structures, for updating the service life design if the structure exists and real material properties and/or the interaction of environment and structure can be measured (real concrete covers, carbonation depths), and for calculating residual service life. The bulletin is divided into five chapters: 1. General 2. Basis of design 3. Verification of Service Life Design 4. Execution and its quality management 5. Maintenance and condition control It also includes four informative annexes, which give background information and examples of procedures and deterioration models for the application in SLD. The format of Bulletin 34 follows the CEB-FIP tradition for Model Codes: the main provisions are given on the right-hand side of the page, and on the left-hand side, the comments. Note: An Italian translation of Bulletin 34 is also available; contact us for further details.
