Strength assessment of in-situ concrete for the evaluation of structural capacity: State of the art

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Title: Strength assessment of in-situ concrete for the evaluation of structural capacity: State of the art
Authors: Sourav, Shah Nur AlamAl-Sabah, SalamMcNally, Ciaran
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Date: 30-Aug-2016
Online since: 2017-01-04T12:58:24Z
Abstract: With more emphasis on reusing and extending the life of structures, it often becomes necessary to assess the capacity of existing concrete structures. One major component of this assessment relates to the concrete strength. Most reliable results are obtained by taking cores. However, such assessment is ideally made with a combination of destructive and nondestructive testing to minimise damage to the structure. The currently available methods for assessing in-situ concrete strength of the existing structures can be broadly divided into two groups. One group of tests is completely non-destructive. The other group is partially destructive where limited damage to the surface is caused by the tests. For the strength evaluation of existing concrete, methods such as surface hardness test, ultrasonic pulse velocity test, penetration resistance test and maturity test fall under the non-destructive category. Partially destructive tests include pull out test, CAPO test, pull off test and break off test. This paper critically evaluates and analyses the applicability and limitations of the methods used for evaluating concrete strength in existing structures. Most methods for strength evaluation are found to measure a certain property such as elasticity, density, tensile strength or hardness of concrete and then relate the measured value to compressive strength. Studies on these methods show a wide variation in the correlations between estimated and predicted compressive strength. Partially destructive methods are noted to provide correlations with good consistency between estimated and predicted compressive strength.
Funding Details: European Commission Horizon 2020
Type of material: Conference Publication
Publisher: Civil Engineering Research Association of Ireland
Copyright (published version): 2016 the authors
Keywords: In-situ testsConcreteCompressive strength
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Language: en
Status of Item: Peer reviewed
Conference Details: Civil Engineering Research in Ireland Conference (CERI 2016), Galway, Ireland, 29-30 August 2016
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Appears in Collections:Civil Engineering Research Collection
TRUSS-ITN Research Collection

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