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Article

Destructive and Non-Destructive Evaluation of Fibre-Reinforced Concrete: A Comprehensive Study of Mechanical Properties

1
Department of Civil Engineering, Zakir Husain Engineering College, Aligarh Muslim University, Aligarh 202002, India
2
Department of Civil Engineering, Xi’an Jiaotong-Liverpool University, Suzhou 215000, China
3
Peter the Great St. Petersburg Polytechnic University, St. Petersburg 195251, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Angelo Marcello Tarantino
Materials 2022, 15(13), 4432; https://doi.org/10.3390/ma15134432
Received: 17 May 2022 / Revised: 17 June 2022 / Accepted: 20 June 2022 / Published: 23 June 2022
(This article belongs to the Section Construction and Building Materials)
Ultrasonic pulse velocity (UPV) and rebound hammer tests are accepted as alternatives to destructive testing to determine the compressive strength, dynamic modulus of elasticity, and Poisson’s ratio, which are needed for structural design. Although much work has been conducted for plain concrete, the research data for fibre-reinforced concrete (FRC) is insufficient. In this regard, this study explains the correlations between compressive strength, rebound hammer, and UPV tests for plain concrete and FRC contains 0.25%, 0.50%, and 1.00% of 30 mm and 50 mm long steel fibres. A total of 78 concrete cube and beam specimens were tested by direct, semi-direct, and indirect UPV and rebound hammer test methods. The study found that the rebound hammer test is more suitable for measuring the compressive strength of matured FRC than young concrete. The UPV test revealed that the volume fraction does not, but the length of steel fibres does affect the UPV results by the direct test method. The UPV direct method has the highest velocity, approximately two times the indirect velocity in FRC. UPV measurements can be effectively used to determine the dynamic modulus of elasticity and Poisson’s ratio of FRC. The dynamic elastic modulus increases while the Poisson’s ratio decreases for the same steel fibre length when at increasing FRC fibre content. The results of this study will be significant for non-destructive evaluations of FRC, while additional recommendations for future studies are presented at the end of the paper. View Full-Text
Keywords: non-destructive test; ultrasonic pulse velocity (UPV); modulus of elasticity; fibre-reinforced concrete (FRC); Poisson’s ratio non-destructive test; ultrasonic pulse velocity (UPV); modulus of elasticity; fibre-reinforced concrete (FRC); Poisson’s ratio
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MDPI and ACS Style

Najm, H.M.; Nanayakkara, O.; Sabri, M.M.S. Destructive and Non-Destructive Evaluation of Fibre-Reinforced Concrete: A Comprehensive Study of Mechanical Properties. Materials 2022, 15, 4432. https://doi.org/10.3390/ma15134432

AMA Style

Najm HM, Nanayakkara O, Sabri MMS. Destructive and Non-Destructive Evaluation of Fibre-Reinforced Concrete: A Comprehensive Study of Mechanical Properties. Materials. 2022; 15(13):4432. https://doi.org/10.3390/ma15134432

Chicago/Turabian Style

Najm, Hadee M., Ominda Nanayakkara, and Mohanad M.S. Sabri. 2022. "Destructive and Non-Destructive Evaluation of Fibre-Reinforced Concrete: A Comprehensive Study of Mechanical Properties" Materials 15, no. 13: 4432. https://doi.org/10.3390/ma15134432

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