Factors influencing the performance of rebound hammer used for non-destructive testing of concrete members: A review

Kumavat, Hemraj R.; Chandak, Narayan R.; Patil, Ishwar T.

doi:10.1016/j.cscm.2021.e00491

Cited by 40 publications

(34 citation statements)

References 26 publications

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“…The influencing factors on the rebound index make it quite difficult to define a conversion model which can be applied to all testing conditions, as has been reported by several authors [9,15]. The present work aims to highlight that, even if the same experimental conditions are ensured, the effects of some influencing factors are minimized and variability in the coefficients of conversion models still remains, which can be predicted by means of ad hoc empirical laws that have been proposed for different analytical formulations of the conversion model.…”

Section: Conversion Models and Calibration Proceduresmentioning

confidence: 99%

“…However, as with any non-destructive test, even if the correct procedure is followed, there is still a number of factors affecting the rebound index (see [13][14][15]).…”

Section: Introductionmentioning

confidence: 99%

“…Another topic is the choice of the analytical formulation that correlates the concrete strength and rebound index and, in detail, if by varying the adopted formulation, the range of variability of the corresponding coefficients varies. Indeed, the influencing factors on the rebound index make it quite difficult to define a conversion model which can be applied to all testing conditions, as has been pointed out by several authors [9,15]. This paper deals with these topics by analyzing the data acquired during an experimental campaign in an existing building on which both compression tests on drilled cores and rebound hammer tests have been performed.…”

Section: Introductionmentioning

confidence: 99%

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The Performance of Empirical Laws for Rebound Hammer Tests on Concrete Structures

Diaferio

Varona

2022

Applied Sciences

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The assessment of concrete compressive strength plays a key role in the analysis of the seismic vulnerability of existing buildings. However, the adoption of classical destructive tests is usually limited by their invasiveness, cost and time needed for the execution. Thus, in order to overcome these limits and allow investigations to be extended to a large number of points, the use of the rebound hammer test is investigated here with a detailed analysis of the effects on the accuracy of the strength assessment related to the choice of the conversion model relating rebound index to compressive strength. The analysis has been performed by comparing several empirical laws calibrated with data acquired in an experimental investigation of an existing concrete building. The relationships between the coefficients of the examined conversion models are then established, with the aim of reducing the unknowns in the calibration procedure. Furthermore, the influence of the coefficients of variation of concrete strength and rebound index on the results of the calibration procedure has been analyzed, thereby supporting the assessment of the accuracy of the concrete strength.

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Section: Conversion Models and Calibration Proceduresmentioning

confidence: 99%

“…However, as with any non-destructive test, even if the correct procedure is followed, there is still a number of factors affecting the rebound index (see [13][14][15]).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Performance of Empirical Laws for Rebound Hammer Tests on Concrete Structures

Diaferio

Varona

2022

Applied Sciences

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“…Samson and Omoniyi [10] demonstrated that for all grades of concrete, the higher the rebound number is, the higher the compressive strength is, and vice versa. However, previous studies also found that the compressive strength regression model, which is established by the rebound hammer method, is affected by the concrete surface (such as the degree of saturation, carbonation, temperature, and surface finish), type of aggregate and cement, mix proportions, and curing conditions [1,[11][12][13][14][15][16]. Nis ¸proposed that the curing methods and duration significantly change the compressive strength of the specimens even in the novel construction materials [17].…”

Section: Introductionmentioning

confidence: 99%

“…Szilágyi et al [7] objected to directly correlating the average rebound number with compressive strength as univariate functions and argued for "a series of multivariate functions with independent variables of the degree of hydration, type and amount of cement and aggregate, environmental conditions, and testing conditions." Kumavat et al [11] considered that the regression models based on the laboratory test might be valid within their implementation boundaries for estimating the compressive strength of concrete. Brencich et al [4] suggested that the conception of a universal calibration curve for any concrete does not exist under any conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Special Testing Strength Curve for Compressive Strength Evaluation by Rebound Method

Yuan

Yang

Jin³

et al. 2021

Advances in Materials Science and Engineering

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This article aims to improve the accuracy and predictability of rebound method in compressive strength evaluation of concrete members of the Yanchong Expressway, which is an important traffic guarantee project for the 2022 Winter Olympics Games in Zhangjiakou city, Hebei Province, China. For this purpose, concrete specimens were prepared by the mixing ratios of C35, C40, and C50. First of all, the paper investigated the effects of curing age, types, and dosage of mineral admixtures (fly ash and slag) on concrete rebound number and compressive strength. Then, the special testing strength curves of 7 d and 90 d curing age were proposed. The results showed that the average relative errors of the special testing strength curves were reduced by 35.99% and 20.26% respectively, compared with the national testing strength curve. Fly ash and slag were beneficial to the growth of concrete rebound numbers but cannot contribute to the growth of concrete compressive strength (except for fly ash single-mixed with 15% dosage). The present results can provide a significant reference for the compressive strength evaluation and later maintenance of concrete members of the Yanchong Expressway or other projects with tight construction period in this area.

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Prozessbegleitende Ableitung mechanischer Eigenschaften hochfester Betone bei Schnellfertigung

Hoppe,

Schwarz,

Stindt

et al. 2024

Beton und Stahlbetonbau

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Die Vorfertigung von Stahlbetonbauteilen bietet erhebliche Vorteile gegenüber einer konventionellen Ortbetonbauweise. Beispielsweise erlaubt die Integration einer rapiden Wärmebehandlung die Reduktion der Fertigungszeit hin zu einer Schnellfertigung in nur wenigen Stunden. Behandlungsdauern und ‐temperaturen nehmen dabei Einfluss auf die Entwicklung der mechanischen Eigenschaften. Die Kontrolle Letzterer gewährleistet die Qualität der Bauteile. Für Betonbauteile werden dazu in der Regel zerstörende Prüfungen in Begleitversuchen eingesetzt. Im Beitrag wird eine Methode entwickelt, mit der sich Druckfestigkeit, E‐Modul und Verbundfestigkeit anhand einer im Prozess integrierbaren Prüfung ableiten lassen. Untersucht wird dazu die Eignung der Rückprallhammerprüfung, wobei die Randbedingungen der Wärmebehandlung berücksichtigt werden. In experimentellen Untersuchungen werden die aufgeführten Zielgrößen für den hochfesten Nanodur‐Beton bei Herstellung mit variierender Wärmebehandlungsdauer bestimmt. Den experimentellen werden rechnerisch, anhand normativ beschriebener Zusammenhänge, abgeleitete Größen gegenübergestellt. So wird ein Modell gebildet, mit dem sich die Druckfestigkeit und auf Basis dieser der Elastizitätsmodul und die Verbundfestigkeit ableiten lassen. Die Methode wird anhand der gegenübergestellten Werte diskutiert und die Anwendung an einem simplen Beispiel gezeigt sowie Empfehlungen für den Einsatz zur Kontrolle mechanischer Eigenschaften in der Schnellfertigung gegeben.

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Factors influencing the performance of rebound hammer used for non-destructive testing of concrete members: A review

Cited by 40 publications

References 26 publications

The Performance of Empirical Laws for Rebound Hammer Tests on Concrete Structures

The Performance of Empirical Laws for Rebound Hammer Tests on Concrete Structures

Experimental Study on Special Testing Strength Curve for Compressive Strength Evaluation by Rebound Method

Prozessbegleitende Ableitung mechanischer Eigenschaften hochfester Betone bei Schnellfertigung

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