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Author : Alexander M. Vaysburd
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (125 download)
Download or read book Predicting the Performance of Concrete Repair Materials :. written by Alexander M. Vaysburd and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alexander M. Vaysburd
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (958 download)
Download or read book Predicting the Performance of Concrete Repair Materials written by Alexander M. Vaysburd and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (946 download)
Download or read book Performance Criteria for Concrete Repair Materials, Phase II Summary Report written by and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a study to develop performance criteria for cement-based repair materials are summarized herein. Results of laboratory tests and field performance studies were correlated and guidance for selection of repair materials that would reduce the risk of premature failures was developed. This guidance includes a standard protocol for repair material data sheets and proposed performance criteria. Results of this study illustrate the significant effect of drying shrinkage on the performance of restrained repair materials. While there was a general correlation between the results of laboratory tests on unrestrained shrinkage specimens and field performance, there is a need for restrained shrinkage tests to evaluate the cracking resistance of repair materials. Although there was a general lack of significant correlation between individual material properties and field performance, results of this study indicate that it is possible to predict the field performance of repair materials based on a combination of material properties determined in laboratory tests. Results of this study emphasize the need for a comprehensive analytical model to predict the cracking resistance of repair materials that considers the interrelationship of pertinent material properties, the relative importance of individual properties, and the effect of environmental conditions on time-dependent material properties.
Author : Behnam Kiani
Publisher :
ISBN 13 :
Total Pages : 120 pages
Book Rating : 4.:/5 (112 download)
Download or read book Novel Repair Material Selection Methodology for Concrete Structures and Related Long-term Performance Prediction Model written by Behnam Kiani and published by . This book was released on 2017 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this thesis is to increase the performance of repair materials in concrete overlays. To meet this objective, a new material selection process is applied. Then, with a focus on volume change in concrete overlays new models for shrinkage and creep are developed, and the ACI model for shrinkage is modified. First, a straightforward repair material selection procedure which covers all criteria and technical requirements is developed. In this regard, a recently proposed MCDM method, namely comprehensive VIKOR is used. Then, the strategy is applied on five different types of patch repair materials to validate the accuracy of the outcomes of the proposed procedure. Second, the improvement of ACI model for shrinkage of concrete containing three types of pozzolans including silica fume (SF) Fly ash (FA) and Slag (SL) is conducted base on a comprehensive database. Particle Swarm Optimization (PSO) method is used to modify time function of ACI model for each type of pozzolan. In addition, a new correction factor associated with compressive strength is generated to capture the effect of dosage and type of each pozzolans. The results of several indicators show better prediction performance the modied ACI model compared to it's original formula. Third, new empirical models are derived to predict the compressive strength of preformed foam cellular concrete using volumetric and weighted approaches. The proposed models are generated by utilizing a robust predictive tool known as genetic programming. A comprehensive database is collected from the literature to cover a wide range of mixture components (such as sand and pozzolans) and mix proportions. The models link the compressive strength to binder, water, and foam volume. Validation of the best model is carried out by using a portion of the data set that is not employed in the calibration process. A comparative study is conducted to evaluate the performance of the proposed model versus other models presented in the literature. Sensitivity and parametric analyses were conducted. The final model has a simple formulation and provides better prediction performance than the other models in the literature.
Author : Peter H. Emmons
Publisher :
ISBN 13 :
Total Pages : 136 pages
Book Rating : 4.3/5 (91 download)
Download or read book Performance Criteria for Concrete Repair Materials written by Peter H. Emmons and published by . This book was released on 1995 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.3/5 (91 download)
Download or read book Performance Criteria for Concrete Repair Materials written by and published by . This book was released on 1999 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.3/5 (91 download)
Download or read book Performance Criteria for Concrete Repair Materials written by and published by . This book was released on 1998 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : J. Glanville
Publisher : CRC Press
ISBN 13 : 1482294915
Total Pages : 204 pages
Book Rating : 4.4/5 (822 download)
Download or read book Prediction of Concrete Durability written by J. Glanville and published by CRC Press. This book was released on 1997-06-12 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Poor durability of concrete is a continuing concern to owners of structures and their professional advisors. Advances in methods of assessing and predicting durability are being made in many areas, and this book provides a state of art review of the current situation. Contributions from leading researchers and consultants make it a valuable guide f
Author : Dan J. Naus
Publisher : RILEM Publications
ISBN 13 : 9782912143365
Total Pages : 408 pages
Book Rating : 4.1/5 (433 download)
Download or read book PRO 29: 2nd International RILEM Workshop on Life Prediction and Aging Management of Concrete Structures written by Dan J. Naus and published by RILEM Publications. This book was released on 2003 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Randall W. Poston
Publisher :
ISBN 13 :
Total Pages : 310 pages
Book Rating : 4.:/5 (319 download)
Download or read book Performance Criteria for Concrete Repair Materials written by Randall W. Poston and published by . This book was released on 1998 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study reported herein is part of an overall investigation to develop performance criteria for cement-based repair materials. In Phase I of the study, preliminary criteria for dimensionally compatible repair materials were developed based on a review of the literature. This review concentrated on identifying pertinent material properties, appropriate test methods, and demonstrated field performance. Laboratory and field tests to evaluate the preliminary performance criteria were conducted in Phase II of the project Twelve candidate repair materials were selected for the experimental portion of the project Bach material was subjected to a series of standard and nonstandard laboratory tests to determine properties which were perceived to be of interest in a repair context and to provide some basic information about their behavior. These tests included: (a) unrestrained and restrained drying shrinkage, (b) modulus of elasticity, (c) tensile and compressive creep, (d) coefficient of thermal expansion, and (e) flexural, compressive, and direct tensile strengths. Concurrent field tests were also conducted to evaluate material durability. Results of the laboratory investigation are described herein. Results of laboratory and field performance tests will be correlated (Phase III) to provide a basis for development of performance criteria for cement-based materials that will provide durable concrete repairs.
Author : Christian U. Grosse
Publisher : Springer Science & Business Media
ISBN 13 : 3540724486
Total Pages : 764 pages
Book Rating : 4.5/5 (47 download)
Download or read book Advances in Construction Materials 2007 written by Christian U. Grosse and published by Springer Science & Business Media. This book was released on 2007-08-14 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is a compilation of recent research results on building construction materials. Civil Engineers and Materials Scientists from all over the world present their ideas for further material developments, the testing of structures and solutions for in situ applications. Many of the innovations, composites and the design of existing material mixes, especially for concrete, are discussed.
Author : Prasada Rao Rangaraju
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.:/5 (277 download)
Download or read book Evaluation of Rapid-set Patching Materials for Portland Cement Concrete Applications written by Prasada Rao Rangaraju and published by . This book was released on 2008 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: A wide variety of rapid set patching materials are available in the industry for repair of concrete. However, the selection of an appropriate material for a particular repair job is challenging as these materials possess a range of physical and mechanical properties and definitive criteria for establishing the compatibility between repair materials and substrate concrete are not adequately defined. Improper selection of repair material, without investigating the compatibility between repair materials and substrate concrete, is a common reason for failure. In this research study, compatibility between eight repair materials, that are on the approved list of the South Carolina Department of Transportation, and a typical substrate concrete was investigated in three stages. First, individual properties of the repair materials such as setting time, flow, compressive strength, flexural strength, split tensile strength, bond strength, drying shrinkage, freeze-thaw resistance, and permeability, were determined using standard ASTM test procedures. Second, the compatibility between repair material and substrate concrete was investigated by testing a composite beam (substrate concrete patched with repair material) in flexure under third point loading. Third, a correlation between the individual repair material properties and the performance of the composite beam was investigated to predict the compatibility of the concrete repair. Based on these studies, the compatibility of the repair materials was evaluated and a new test method is proposed to examine the compatibility between repair material and substrate concrete.
Author :
Publisher :
ISBN 13 : 9780949160133
Total Pages : pages
Book Rating : 4.1/5 (61 download)
Download or read book Laboratory Performance of Concrete Repair Materials written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Boyu Wang
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (119 download)
Download or read book Durability Evaluation of Cement-based Repair Materials Used for Corrosion-damaged Steel-reinforced Concrete Structures written by Boyu Wang and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete repair materials are being widely used to restore and extend the service life of structures. While most cement-based repair materials are compatible with concrete structures, their durability properties do not attract much attention which it deserves from researchers. Since repair materials can deteriorate like conventional concrete, the search for reliable, long-lasting concrete repair materials is becoming more intensive. Amongst other factors, concrete permeability and chloride diffusivity within concrete are believed to play a major role in determining the durability and success of the repair. These two parameters determine the penetration rate of aggressive substances into concrete and how fast degradation could take place. A number of test methods have been proposed to study these two factors, and the commonly used test methods are water penetration, surface/bulk electrical resistivity, rapid chloride permeability (RCP), and half-cell potential. However, the relationship between each durability test method and their correlation with compressive strength measurement have not been fully understood. So, in this study, we aim for using multiple testing techniques, destructive and non-destructive, to evaluate the durability of concrete repair materials as well as correlating different test methods. Three types of commercially available cement-based materials are tested and evaluated, and results have indicated that cementitious concrete mortar (termed as Mix M) amongst others has the best durability performance which means low water permeability, high resistivity, and compressive strength. Whereas, the flexural performance of Mix M still needs some improvement in terms of flexural strength and flexural toughness. For various durability testing methods, surface resistivity is found to have a strong linear relation and a polynomial relation to bulk resistivity and water permeability respectively. No relationship is established between concrete resistivity and compressive strength, though high-strength concrete tends to have a high resistivity in our study. RCP test results do not correlate well with resistivity measurements, which requires further study to overcome its heating and binding effect when measurements are being taken. Half-cell potential method is used for validating test results but it reveals no difference for materials with different permeability and resistivity. A model is proposed to counteract temperature's effect while calculating the coefficient of diffusion, which indicates the concrete to resist chloride diffusion. It is found that this model can shift the RCP measurement slightly closer to its theoretical prediction but the difference between them is still large. Therefore, further research is required for acquiring more raw data from RCP measurements as the regression analysis input. In addition, a more comprehensive model that involves more correction factors for binding effects, etc., is also needed.
Author : Lawrence I. Knab
Publisher :
ISBN 13 :
Total Pages : 74 pages
Book Rating : 4.:/5 (359 download)
Download or read book Factors Related to the Performance of Concrete Repair Materials written by Lawrence I. Knab and published by . This book was released on 1988 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nayef Ghasem
Publisher : CRC Press
ISBN 13 : 0415468507
Total Pages : 478 pages
Book Rating : 4.4/5 (154 download)
Download or read book Principles of Chemical Engineering Processes written by Nayef Ghasem and published by CRC Press. This book was released on 2008-09-19 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written in a clear, concise style, Principles of Chemical Engineering Processes provides an introduction to the basic principles and calculation techniques that are fundamental to the field. The text focuses on problems in material and energy balances in relation to chemical reactors and introduces software that employs numerical methods to solve these problems. Upon mastery of this material, readers will be able to: Understand basic processing terminology (batch, semibatch, continuous, purge, and recycle) and standard operations (reaction, distillation, absorption, extraction, and filtration) Draw and fully label a flowchart for a given process description Choose a convenient basis for calculation for both single- and multiple-unit processes Identify possible subsystems for which material and energy balances might be written Perform a degree of freedom analysis for the overall system and each possible subsystem, formulating the appropriate material and energy balance equations Apply the first law of thermodynamics, calculate energy and enthalpy changes, and construct energy balances on closed and open systems Written as a text to fully meet the needs of advanced undergraduate students, it is also suitable as a reference for chemical engineers with its wide coverage across the biochemical and electromechanical fields. Each chapter of the text provides examples, case studies, and end-of-chapter problems, and the accompanying CD-ROM contains software designed for solving problems in chemical engineering.
Author : Arnon Bentur
Publisher : RILEM Publications
ISBN 13 : 9782912143297
Total Pages : 406 pages
Book Rating : 4.1/5 (432 download)
Download or read book PRO 23: International RILEM Conference on Early Age Cracking in Cementitious Systems - EAC'01 written by Arnon Bentur and published by RILEM Publications. This book was released on 2002 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
