The heterogeneity of mechanical properties of concrete in formed constructions horizontally

Stawiski, Bohdan

doi:10.1016/j.acme.2012.03.006

Cited by 29 publications

(26 citation statements)

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“…The ultrasonic tomography and impact-echo techniques are suitable for this purpose (Gorzelańczyk et al 2012a, b;Gorzelańczyk, Schabowicz 2012;Hoła et al 2008Hoła et al , 2011Hoła, Schabowicz 2010;Schabowicz, Hoła 2012). Although these acoustic techniques (Hoła, Schabowicz 2010;Gorzelańczyk 2011Gorzelańczyk , 2012Goszczyńska et al 2012;Hoła, Schabowicz 2010;Stawiski 2012) have been described by Samokrutov and Shevaldykin (2011), Shevaldykin et al (2003) and Sansalone and Strett (1997) and in reports (ACI 228.2R-98 1998;Bundesanstalt für Straßenwesen 2001;ASTM C1383-04 2010, no methodology for their comprehensive (in the sense that the results of tests carried out using one of the techniques are subsequently verified by the results obtained by the other technique) use has been developed. The comprehensive approach is necessary especially when it is impossible to verify the test results in a destructive way.…”

Section: Introductionmentioning

confidence: 95%

Methodology for Non-Destructive Identification of Thickness of Unilaterally Accessible Concrete Elements by Means of State-of-the-Art Acoustic Techniques

Schabowicz

2013

Journal of Civil Engineering and Management

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The paper presents a methodology for comprehensive use of ultrasonic tomography and impact-echo Á the state-of-the-art acoustic techniques Á for non-destructive identification of the thickness of unilaterally accessible concrete elements. Since the techniques are not commonly used, they are little known. Therefore, a brief description of the techniques is given to facilitate the understanding of the subsequently presented methodology. The article gives a practical example of the use of the methodology, which demonstrates its suitability for non-destructive identification of the thickness of concrete elements, particularly those only accessible from one side. In the example, the concrete shell of a heat pipe, carrying tunnel located under a river was tested using the ultrasonic tomography and impact-echo techniques. The tests were carried out according to the proposed methodology. It should be noted that the test results yielded by the two methods were similar. In this way, the proposed methodology has been validated.

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Section: Introductionmentioning

confidence: 95%

Methodology for Non-Destructive Identification of Thickness of Unilaterally Accessible Concrete Elements by Means of State-of-the-Art Acoustic Techniques

Schabowicz

2013

Journal of Civil Engineering and Management

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“…However, the task of evaluating steel fibre cement in concrete used to make industrial floors is difficult. Steel fibre reinforced concrete is mostly formed horizontally when constructing industrial floors on the ground and it is assumed its mechanical strength is not identical in all directions [17]. The impact of the air content and the density of hardened concrete on the properties of this kind of industrial floor is also unknown.…”

Section: Introductionmentioning

confidence: 99%

The effect of the concentration of steel fibres on the properties of industrial floors

Krzywiński¹,

Chajec²,

Sadowski³

2019

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The effect of the concentration of steel fibres on the properties of industrial floors Wpływ zawartości włókien stalowych na właściwości posadzek przemysłowych Abstract This paper presents the results of a series of experiments on samples made of steel fibre reinforced concrete. The investigated samples were made with different concentrations of steel fibres ranging from 20.0 to 32.5 kg/m3. Twenty-one cubic samples (15 x 15 x 15 cm) and fourteen cuboid samples (15 x 15 x 60 cm) were used for this investigation. The article focusses on the effect of the concentration of steel fibres on the properties of industrial floors. for this purpose, both destructive and non-destructive methods were used and compared. as a result of this study, it has been proved that compressive and flexural tensile strength are lower with increasing air content and decreasing density of concrete. moreover, it was found that there is a correlation between ultrasonic pulse velocity and rebound hammer results which together can be used to estimate the compressive strength of steel fibre reinforced concrete. Streszczenie W niniejszym artykule przedstawiono wyniki serii eksperymentów wykonanych na próbkach z betonu zbrojonego włóknami stalowymi. badane próbki zbrojone były różną zawartością włókien stalowych od 20.0 do 32.5 kg/m3. Do badań użyto 21 sześciennych (15 x 15 x 15 cm) i 14 prostopadłościennych (15 x 15 x 60 cm) próbek betonowych. W artykule skupiono się na zbadaniu wpływu zawartości włókien stalowych na właściwości posadzek przemysłowych. Do badań zastosowano i porównano metody niszczące oraz nieniszczące. W rezultacie udowodniono, że wytrzymałość na ściskanie i rozciąganie przy zginaniu zmniejsza się wraz ze wzrostem zawartości powietrza i malejącą gęstością betonu. Ponadto stwierdzono, że istnieje korelacja między wynikami ultradźwiękowymi i sklerometrycznymi, które mogą być wykorzystane do oszacowania wytrzymałości na ściskanie betonu zbrojonego włóknami stalowymi. Słowa kluczowe: włókna stalowe, posadzki przemysłowe, metody nieniszczące

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“…Also in Bishko (2007) the nondestructive ultrasonic tomography method was recommended for identifying defects in concrete members. Stawiski (2012) used the nondestructive ultrasonic method and point probes to identify concrete nonhomogeneities in horizontally formed members. Quiviger et al (2010) proposed to use the nondestructive ultrasonic echo method to identify macrononhomogeneities and macrocracks in concrete members.…”

Section: Survey Of Literaturementioning

confidence: 99%

Methodology of Nondestructive Identification of Defective Concrete Zones in Unilaterally Accessible Massive Members

Gorzelańczyk

Hoła

Sadowski

et al. 2013

Journal of Civil Engineering and Management

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Abstract. The paper deals with the nondestructive identification of defective concrete zones in unilaterally accessible massive members, for example, access galleries in hydroelectric power plants. The concrete in such zones is, for various reasons, excessively porous. The authors propose to use state-of-the-art acoustic testing techniques, including ultrasonic tomography, integratively to detect and identify defective zones. An original methodology for such tests has been developed. The methodology is illustrated with an example of its practical application to a real civil engineering structure.

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The heterogeneity of mechanical properties of concrete in formed constructions horizontally

Cited by 29 publications

References 1 publication

Methodology for Non-Destructive Identification of Thickness of Unilaterally Accessible Concrete Elements by Means of State-of-the-Art Acoustic Techniques

Methodology for Non-Destructive Identification of Thickness of Unilaterally Accessible Concrete Elements by Means of State-of-the-Art Acoustic Techniques

The effect of the concentration of steel fibres on the properties of industrial floors

Methodology of Nondestructive Identification of Defective Concrete Zones in Unilaterally Accessible Massive Members

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