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Author by :
Languange Used : en
Release Date : 1978
Publisher by :

ISBN : OCLC:4909828

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Author by : V.M. Malhotra
Languange Used : en
Release Date : 2003-12-29
Publisher by : CRC Press

ISBN : 9781420040050

Civil and structural engineering consultants engaged in quality control or investigations of hardened concrete need a comprehensive resource that explains the methods of determining strength and other performance characteristics. Handbook on Nondestructive Testing of Concrete, Second Edition answers this demand by providing a thorough analys...

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Author by : Irving Kett
Languange Used : en
Release Date : 2009-12-23
Publisher by : CRC Press

ISBN : 9781420091175

As every civil engineer knows, Portland Cement is the most versatile and important material of construction, and will probably remain so far into the future. Yet few books, if any, exist that offer an in-depth analysis of the mixing and testing methods of this vital hydraulic cement. This statement, written about the first edition of Engineere...

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Author by : John H. Bungey
Languange Used : en
Release Date : 2006-01-12
Publisher by : CRC Press

ISBN : 9781482264685

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....

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Author by : H.W. Reinhardt
Languange Used : en
Release Date : 1991-01-31
Publisher by : CRC Press

ISBN : 9781482289039

Testing concrete while construction is underway enables decisions to be made which can improve the quality of the finished structure. The book covers testing and measuring techniques for fresh concrete and concrete during the first few days after placing, and for reinforcement and prestressing tendons. Many examples are given of practical methods w...

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Author by : J.H. Bungey
Languange Used : en
Release Date : 2010-09-03
Publisher by : CRC Press

ISBN : 9780203487839

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....

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Author by :
Languange Used : en
Release Date : 1978
Publisher by : ASTM International

ISBN :

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Author by : Maitham Fadhil Abbas Alwash
Languange Used : en
Release Date : 2017
Publisher by :

ISBN : OCLC:988611239

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....

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Author by : Denys Breysse
Languange Used : en
Release Date : 2012-01-20
Publisher by : Springer Science & Business Media

ISBN : 9789400727359

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....

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Author by : Sándor Popovics
Languange Used : en
Release Date : 1998-03-23
Publisher by : John Wiley & Sons

ISBN : 0471149039

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....