PSI - Issue 64

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ScienceDirect Structural Integrity Procedia 00 (2024) 000 – 000 Structural Integrity Procedia 00 (2024) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 64 (2024) 130–136

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures On the Assessment of the In-place Concrete Quality: Rebound Hammer and Pull-off Tests Reliability Said DEBBAKH a, * Sihem CHAIBEDDRA a , Adel BENIDIR a a National Center of Integrated Studies and Research on Building Engineering (CNERIB), El Mokrani New city, 16097, Souidania, Algiers, Algeria Abstract Several non-destructive and partially destructive tests (NDT and PDT) are available for assessing of the in-place concrete quality. In this article, rebound hammer and pull-off tests are used to check the in-place concrete quality of reinforced concrete columns after one year of exposure to natural conditions, and which have been previously characterized in compression based on the influence of core diameter. Both tests were performed on different locations through the height of the columns (upper, medium and lower zones). Results of the compressive strength values derived (D fc ) from the rebound hammer test reveal a variability through the different zones, with a standard deviation greater than 13%. On the other hand, the results of the partially destructive test (pull-off test) show an increasing trend of the tensile bond strength toward the bottom of the columns (tensile bond strength of the upper zone is inferior to the medium and lower zones), with a standard deviation greater than 11% for each reinforced concrete column. Based on these results, the reliability of both tests has been discussed. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures On the Assessment of the In-place Concrete Quality: Rebound Hammer and Pull-off Tests Reliability Said DEBBAKH a, * Sihem CHAIBEDDRA a , Adel BENIDIR a a National Center of Integrated Studies and Research on Building Engineering (CNERIB), El Mokrani New city, 16097, Souidania, Algiers, Algeria Abstract Several non-destructive and partially destructive tests (NDT and PDT) are available for assessing of the in-place concrete quality. In this article, rebound hammer and pull-off tests are used to check the in-place concrete quality of reinforced concrete columns after one year of exposure to natural conditions, and which have been previously characterized in compression based on the influence of core diameter. Both tests were performed on different locations through the height of the columns (upper, medium and lower zones). Results of the compressive strength values derived (D fc ) from the rebound hammer test reveal a variability through the different zones, with a standard deviation greater than 13%. On the other hand, the results of the partially destructive test (pull-off test) show an increasing trend of the tensile bond strength toward the bottom of the columns (tensile bond strength of the upper zone is inferior to the medium and lower zones), with a standard deviation greater than 11% for each reinforced concrete column. Based on these results, the reliability of both tests has been discussed. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Concrete quality; non-destructive tests; zone effect; reliability. © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Peer-review under responsibility of SMAR 2024 Organizers Keywords: Concrete quality; non-destructive tests; zone effect; reliability.

Nomenclature NDT Nomenclature NDT PDT

Non-Destructive Test Partially Destructive Test Derived compressive strength Non-Destructive Test Partially Destructive Test Derived compressive strength

PDT D fc D fc

* Corresponding author. Tel.: +213-782-961-775; fax: +213-20-291-364. E-mail address: debbakh.cnerib@gmail.com * Corresponding author. Tel.: +213-782-961-775; fax: +213-20-291-364. E-mail address: debbakh.cnerib@gmail.com

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

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