Download or read book Assessment of Concrete Strength in Existing Structures Using Nondestructive Tests and Cores written by Maitham Fadhil Abbas Alwash and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: To assess concrete strength in an existing structure, the current methodology combines nondestructive measurements (NDT) like rebound hammer or/and pulse velocity with destructive technique (cores) in order to implement a relationship ''conversion model” between the compressive strength and NDT measurements. The conversion model is used to estimate the local strength value at each test location using the corresponding NDT value.Then the estimated mean strength and/or estimated strength standard deviation (concrete strength variability) values are calculated. However, the reliability of these estimated values isalways a questionable issue because of the uncertainties associated with the strength assessment based upon NDT measurements. To improve the reliability, the uncertainties must be reduced by specifying and controlling their influencing factors. Therefore, the objective of this thesis is to analyze the current assessment methodology in order to provide practical recommendations that can improve the reliability of assessing the in-situ strength in existing concrete structures by nondestructive tests and cores.To this end, a simulator was built in order to analyze the effects of the most influencing factors using a large campaign of datasets from different sources (in-situ or laboratory studies,and generated synthetic data).The first contribution of this work is the development of a new model identification approach“bi-objective” that can efficiently capture the strength variability in addition to the mean strength. After studying the effect of the way of selection the core locations, a method was proposed to select these locations depending on the NDT measurements “conditional selection” that improves the quality of assessment without additional cost. A third innovation was the development of a procedure to identify the relation between the number of cores and the accuracy of the estimation. Finally recommendations were derived in order to providemore reliable estimated values.

Download or read book The Testing of Concrete in Structures written by J. H. Bungey and published by Chapman & Hall. This book was released on 1982 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Non Destructive In Situ Strength Assessment of Concrete written by Denys Breysse and published by Springer Nature. This book was released on 2021-04-27 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents the work of the RILEM Technical Committee 249-ISC. Addressing the effective application of new recommendations for non-destructive in situ strength assessment of concrete, it provides information about the different steps of the investigation and processing of test results, until the delivery of strength estimates, and includes tables giving the minimum required number of cores in a variety of situations as well as several examples of how the recommendations can be used in practice. The book explores a topic which is of major importance, i.e. the assessment of concrete compressive strength in existing structures. This property (both mean and standard deviation) is a key input in many cases, such as the reinforcement of structures, the safety checking, the extension of service life. As the new RILEM recommendations imply a deep revision (and improvement) of field practice, the book is intended for managers of structures, structural engineers and specialists of NDT that have to answer these issues. More widely, it will benefit engineers and students who are interested in NDT and in the safety analysis of structures.

Download or read book In place Methods to Estimate Concrete Strength written by ACI Committee 228--Nondestructive Testing of Concrete and published by . This book was released on 1995 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook on Nondestructive Testing of Concrete written by V. M. Malhotra and published by CRC Press. This book was released on 2004 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: Civil engineers will value this resource that examines the tools and techniques used to estimate the in-place strength on concrete, permeation properties that relate to potential durability, and the methods used to assess the internal condition of concrete and the corrosion activity of steel reinforcement.

Download or read book Non Destructive Assessment of Concrete Structures Reliability and Limits of Single and Combined Techniques written by Denys Breysse and published by Springer Science & Business Media. This book was released on 2012-01-20 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives information on non destructive techniques for assessment of concrete structures. It synthesizes the best of international knowledge about what techniques can be used for assessing material properties (strength) and structural properties (geometry, defects...). It describes how the techniques can be used so as to answer a series of usual questions, highlighting their capabilities and limits, and providing advices for a better use of techniques. It also focuses on possible combinations of techniques so as to improve the assessment. It is based on many illustrative examples and give in each case references to standards and guidelines.

Download or read book In Situ Nondestructive Testing of Concrete written by and published by . This book was released on 1984 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Non destructive Testing of Materials in Civil Engineering written by Krzysztof Schabowicz and published by MDPI. This book was released on 2019-11-19 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was proposed and organized as a means to present recent developments in the field of nondestructive testing of materials in civil engineering. For this reason, the articles highlighted in this editorial relate to different aspects of nondestructive testing of different materials in civil engineering—from building materials to building structures. The current trend in the development of nondestructive testing of materials in civil engineering is mainly concerned with the detection of flaws and defects in concrete elements and structures, and acoustic methods predominate in this field. As in medicine, the trend is towards designing test equipment that allows one to obtain a picture of the inside of the tested element and materials. From this point of view, interesting results with significance for building practices have been obtained

Download or read book Strength Evaluation of Existing Concrete Buildings written by American Concrete Institute and published by . This book was released on 2003 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Strength and Related Properties of Concrete written by Sándor Popovics and published by John Wiley & Sons. This book was released on 1998-03-23 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work discusses the variations that occur in the strength of concrete and presents numerical methods useful in interpreting these variations. Individual chapters include the relationship between composition and strength of concrete.

Download or read book Compressive Strength of Concrete written by Pavel Krivenko and published by BoD – Books on Demand. This book was released on 2020-03-11 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete made using mineral cements, the raw materials which on earth are practically endless, is known as one of the oldest building materials and during the last decades of the twentieth century has become a dominant building material for general use. At the same time, the requirements of the quality of concrete and its performance properties, in particular compressive strength, durability, economical efficiency, and low negative impact of its manufacture on the environment have not yet been completely met. Bearing these requirements in mind, researchers and engineers worldwide are working on how to satisfy these requirements. This book has been written by researchers and experts in the field and provides the state of the art on recent progress achieved on the properties of concrete, including concrete in which industrial by-products are utilized. The book is dedicated to graduate students, researchers, and practicing engineers in related fields.

Download or read book Testing of Concrete in Structures written by John H. Bungey and published by CRC Press. This book was released on 2006-01-12 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classic reference has been thoroughly updated and is ideal for the non-specialist civil engineer involved in the assessment, repair or maintenance of concrete structures. Topics have been expanded to reflect significant advances in the field, including integrity assessment, sub-surface radar, corrosion assessment and localized dynamic response tests. It also covers new trends in equipment and procedures, such as in automated test methods and developments in digital technology and emphasizes performance monitoring, and includes new and updated references to standards.

Download or read book Guide for Obtaining Cores and Interpreting Compressive Strength Results written by ACI Committee 214 and published by . This book was released on 2003 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide summarizes current practices for obtaining cores and interpreting core compressive strength test results. Factors that affect the in-place concrete strength are reviewed so locations for sampling can be selected that are consistent with the objectives of the investigation.

Download or read book Assessment of Concrete Strength in Existing Structures written by F. Michael Bartlett and published by Department of Civil Engineering, University of Alberta. This book was released on 1994 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Non Destructive Evaluation of Reinforced Concrete Structures Deterioration Processes and Standard Test Methods written by Christiane Maierhofer and published by Woodhead Publishing. This book was released on 2010-06 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This authoritative book provides a comprehensive review of the highly important subject of non-destructive evaluation of reinforced concrete structures. Engineers have a range of sophisticated techniques at their disposal to assess the condition of reinforced concrete structures that do not cause material damage and which usually enable the structure to be used while the surveys are carried out. Non-destructive evaluation of the infrastructure also plays a key role in calculating and prioritising where money should be spent on repair or replacement. Providing details of related techniques and case studies, this book offers an overview of how to plan and implement the NDT of reinforced concrete structures.

Download or read book Guide to Assessment of Concrete Strength in Existing Structures written by British Standards Institute Staff and published by . This book was released on 1981-11-30 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concretes, Cement and concrete technology, Strength of materials, Mechanical testing, In situ, Field testing, Structural members, Test specimens, Cubic shape, Structural design, Ultrasonic testing, Fracture, Surface properties, Hardness testing, Compressive strength, Compression testing

Download or read book Testing of Concrete in Structures Third Edition written by J.H. Bungey and published by CRC Press. This book was released on 2010-09-03 with total page 297 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive overview of the techniques involved in testing concrete in structures. The non-specialist civil engineer involved in assessment, repair or maintanance of concrete structures will find this a thorough update of the second edition, with an expansion of those areas where recent developments have made significant advances, for example in integrity assessment.