Prediction of concrete compressive strength by combined non-destructive methods

Nobile, Lucio

doi:10.1007/s11012-014-9881-5

Cited by 37 publications

(14 citation statements)

References 5 publications

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“…For normal strength concrete, some in situ core tests were carried out [18,19]. However, such tests are rare for high strength concrete members.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Compressive Strength of High Strength Concrete Using Non-Destructive Technique and Concrete Core Strength

Park

2017

Applied Sciences

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Abstract:Estimating the compressive strength of high strength concrete (HSC) is an essential investigation for the maintenance of nuclear power plant (NPP) structures. This study intends to evaluate the compressive strength of HSC using two approaches: non-destructive tests and concrete core strength. For non-destructive tests, samples of HSC were mixed to a specified design strength of 40, 60 and 100 MPa. Based on a dual regression relation between ultrasonic pulse velocity (UPV) and rebound hammer (RH) measurements, an estimation expression is developed. In comparison to previously published estimation equations, the equation proposed in this study shows the highest accuracy and the lowest root mean square error (RMSE). For the estimation of compressive strength using concrete core specimens, three different concrete core diameters were examined: 30, 50, and 100 mm. Based on 61 measured compressive strengths of core specimens, a simple strength correction factor is investigated. The compressive strength of a concrete core specimen decreases as the core diameter reduces. Such a relation is associated with the internal damage of concrete cores and the degree of coarse aggregate within the core diameter from the extracting process of the cores. The strength estimation expressions was formulated using the non-destructive technique and the core strength estimation can be updated with further test results and utilized for the maintenance of NPP.

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“…For normal strength concrete, some in situ core tests were carried out [18,19]. However, such tests are rare for high strength concrete members.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Compressive Strength of High Strength Concrete Using Non-Destructive Technique and Concrete Core Strength

Park

2017

Applied Sciences

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“…The values a, b and c are constants and were determined by the least square's method. In the case study, the following correlation curve was derived by an optimization procedure where best-fit curve has been obtained using Mathematica® software: , = 3.1 × 10 −5 1.8468 0.8516 (9) in which concrete cubic compressive strength, Rc, is expressed in MPa while the ultrasonic velocity in m/s with the mean error estimated in e = 0.065. Figure 9 shows the comparison between the compressive strengths, fc, obtained from the crushing of the cores with the respective values, Rc,corr, calculated through the correlation (9) from the Ir and V measured on the structural element where the cores have been extracted.…”

Section: Non-destructive Tests -Sonreb Methodsmentioning

confidence: 99%

“…The solution for assessing the behaviour of existing structures made of reinforced concrete is using of both methods, the destructive (DT) and non-destructive (NDT) methods, and their improvements [8], that allow extending the results obtained with DT surveys at all points. To identify the best correlations between NDT and DT, as seen in [9], the author investigates the properties of concrete by some structural elements extracted from school buildings, designed for vertical loads only. The results of NDT and DT are analysed both on beam elements and on pillar elements.…”

Section: Introductionmentioning

confidence: 99%

The Use of Destructive and Non-Destructive Testing in Concrete Strength Assessment for a School Building

Minutolo¹,

Ronza²,

Eramo³

et al. 2019

IJARET

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The present paper aims to increase knowledge of the methods of resistance estimating of concrete in situ by means of non-destructive tests used to integrate the quantitative results from cylindrical specimens (core). The results of experimental investigations carried out on concrete conglomerate samples of a school building are shown. The experimental campaign then will be presented like a case study, conducted on a series of concrete beams and pillars of an existing building. The expression obtained through the calibration procedure of the values of non-destructive tests with those provided by the core drills allowed to estimate the average values of the compressive strength of the concrete. It is highlighted how this result was achieved with a very limited core number that are extracted in randomly selected points and that there was a proportionality link with the resistances obtained from non-destructive tests.

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“…Before taking the core sample, [28], Ultrasonic methods manual book [29] and SonReb method formulations [30][31][32][33]. Another formulation proposed in Technical Standards of Tuscany Region [33] is the mean value calculated by the above three formulations [34].…”

Section: Methodsmentioning

confidence: 99%

A New Nomogram Proposal to Determine Concrete Compressive Strength by Combined Nondestructive Testing Methods

Bingöl

Çavdar

2016

Research in Nondestructive Evaluation

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Concrete is the most widely used construction material in contemporary construction technology.In particular, it holds an important place in the building industry in the World. Since concrete is an un-homogeneous material, determining the strength of concrete accurately is quite difficult. In this respect, to check the mechanical properties of concrete in-situ, non-destructive test methods can be used. They are useful as they do not damage concrete, however, these test results are sometimes deceptive. To reduce these deceptive results, destructive test methods were proposed to increase the accuracy of non-destructive methods (NDT).The objective of this study is to determine the strength of concrete with different characteristic strengths using destructive and non-destructive testing methods, and to establish new relationships between the compressive strength of concrete and Schmidt rebound values, and ultrasonic wave velocities. For this purpose, 101 concrete cube samples were prepared. After 7 Downloaded by [University of Sussex Library] at 00:11 28 June 2016A c c e p t e d M a n u s c r i p t 2 and 28 days of curing, Schmidt rebound and ultrasonic wave velocity tests were applied as nondestructive testing methods. New formulations and graphs were established by carrying out a multiple regression analysis between the ultrasonic wave velocities, Schmidt rebound values and compressive strengths. Thus, a new combined NDT method was developed with a nomogram. Furthermore, the applicability and accuracy of the formula and graph obtained were investigated by comparing the results of core samples from existing structures.The most important findings obtained from the study are summarized below. The concrete strength can be determined with non-destructive formulas obtained with an accuracy of 85%.High strength concrete cube samples in-house are obtained with 1.6% deviation and core samples in-situ can be obtained with 7.3% deviation with the newly developed NDT nomogram.These test results show that the newly developed NDT formulas in this study are a very good alternative for determining concrete strength in-situ.

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Prediction of concrete compressive strength by combined non-destructive methods

Cited by 37 publications

References 5 publications

Estimation of Compressive Strength of High Strength Concrete Using Non-Destructive Technique and Concrete Core Strength

Estimation of Compressive Strength of High Strength Concrete Using Non-Destructive Technique and Concrete Core Strength

The Use of Destructive and Non-Destructive Testing in Concrete Strength Assessment for a School Building

A New Nomogram Proposal to Determine Concrete Compressive Strength by Combined Nondestructive Testing Methods

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