Determination of steel fibres distribution in self-compacting concrete beams using X-ray computed tomography

Ponikiewski, Tomasz; Gołaszewski, Jacek; Rudzki, Marcin; Bugdol, Monika

doi:10.1016/j.acme.2014.08.008

Cited by 61 publications

(30 citation statements)

References 35 publications

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“…The greatest effect [53][54][55] is achieved through the synergistic impact of man-made pozzolanic additives (fly ash) and sedimentary-origin natural materials (limestone) at the content of OPC, 55 wt.%; LCW, 5 wt.%; and FA, 40 wt.%.…”

Section: Experimental Partmentioning

confidence: 99%

Mechanical Properties of Fiber-Reinforced Concrete Using Composite Binders

Fediuk

Smoliakov

Muraviov

2017

Advances in Materials Science and Engineering

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This paper investigates the creation of high-density impermeable concrete. The effect of the "cement, fly ash, and limestone" composite binders obtained by joint grinding with superplasticizer in the varioplanetary mill on the process of structure formation was studied. Compaction of structure on micro-and nanoscale levels was characterized by different techniques: X-ray diffraction, DTA-TGA, and electron microscopy. Results showed that the grinding of active mineral supplements allows crystallization centers to be created by ash particles as a result of the binding of Ca(OH) 2 during hardening alite, which intensifies the clinker minerals hydration process; the presence of fine grains limestone also leads to the hydrocarboaluminates calcium formation. The relation between cement stone neoplasms composition as well as fibrous concrete porosity and permeability of composite at nanoscale level for use of composite binders with polydispersed mineral supplements was revealed. The results are of potential importance in developing the wide range of fine-grained fiber-reinforced concrete with a compressive strength more than 100 MPa, with low permeability under actual operating conditions.

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Section: Experimental Partmentioning

confidence: 99%

Mechanical Properties of Fiber-Reinforced Concrete Using Composite Binders

Fediuk

Smoliakov

Muraviov

2017

Advances in Materials Science and Engineering

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“…The mix design has not been adjusted (as proposed by Ferrara et al [14]) to account for the incorporation of larger volumes of fibre. In this way the compliance with previous research programmes [36][37][38]43] was maintained and full comparison of achieved results is enabled.…”

Section: Materials and Mixture Compositionmentioning

confidence: 99%

“…Basic geometric properties of the fibres are presented in Table 1. The choice of the fibres was based on previous research experience of the authors and other researchers with SFRC and SCC mixes [33][34][35]37]. The commercial availability and number of civil engineering applications of specific fibre types were also studied and taken into consideration [22].…”

Section: Materials and Mixture Compositionmentioning

confidence: 99%

“…The main obstacle in successful implementation of SFR-SCC in civil engineering is the lack of thorough analysis of fibre distribution (especially when considering thin elements [8,23]). The results of a few research programmes dealing with SFR-SCC [6,7,24,26,37] prove that fibre distribution in such structural elements varies due to the type of casting process, the flow rate, the wall effect, the location of concrete casting point (CCP), the thickness of elements and the proximity to the bottom of moulds. Variations in fibre distribution in case of SFR-SCC can be higher compared to traditional SFRC.…”

Section: Introductionmentioning

confidence: 99%

“…Keeping in mind all previous technological experience with SFR-SCC, the authors decided to apply X-ray computed tomography (XCT) as a non-destructive method to assess its fibre distribution. XCT also proved to be an efficient and flexible non-destructive method of high-resolution microstructural characterization of different materials [24,25,37,39,40,48,49]. The main aim of the research programme was to denominate the correlation between the location of CCP, fibre distribution and mechanical properties of hardened SFR-SCC beams.…”

Section: Introductionmentioning

confidence: 99%

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X-ray computed tomography of fibre reinforced self-compacting concrete as a tool of assessing its flexural behaviour

Ponikiewski

Katzer

2015

Mater Struct

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The aim of the presented research programme was to investigate the flexural behaviour of steel fibre reinforced self-compacting concrete beams. The tested beams were reinforced with two types of crimped steel fibres. Fibres were added in volumes of 0.5, 1.0 and 1.5 %. The experimental tests were conducted on specimens cut from 1.2 m long elements. Before destructive mechanical testing the specimens were subjected to medical X-ray computed tomography (XCT) procedures. Results of XCT allowed to determine the distribution of fibres. The flexural behaviour of the beams was tested according to the RILEM TC 162-TDF recommendation. A comparison of non-destructive results and mechanical behaviour of tested specimens proved a very strong dependence. XCT also made it possible to assess the uniformity of fibre distribution throughout the tested elements. The influence of the location of concrete casting on fibre distribution was determined. The influence of mixture flow on fibre orientation was also analysed.

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Rettinger

Guhathakurta

Gänz

et al. 2022

Beton und Stahlbetonbau

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Die industrielle Computertomographie (CT) ermöglicht den Blick „hinter die Kulissen“ von erhärteten Betonbauteilen und liefert hochpräzise Messdaten aus dem Bauteilinneren. Unter der Voraussetzung der Verfügbarkeit eines für das Bauteil geeigneten Computertomographen kann so eine Vielzahl von Informationen erfasst werden, die zuvor meist nur durch eine Bauteilöffnung/‐zerstörung zugänglich war. Diese Informationen, wie z. B. die genaue Bewehrungslage oder die lokale Häufung von Lufteinschlüssen im Beton, sind relevant für die Qualität von Betonfertigteilen und können in einem Qualitätssicherungssystem im Betonfertigteilwerk gewinnbringend eingesetzt werden. Besonders im Rahmen der Automatisierung und Digitalisierung der Betonfertigteilherstellung birgt eine in den Fließfertigungsprozess integrierte CT‐Qualitätsüberwachung ein großes Potenzial. Auf diese Weise können beispielsweise Segmentfertigteilbrücken hergestellt werden, bei denen die einzeln qualitätsgeprüften Fertigteilsegmente später auf der Baustelle durch Vorspannung und mithilfe von verzahnten Kontaktfugen zu Brücken verbunden werden. Mit den durch CT erfassten Informationen ist es möglich, schwankende, bislang durch die Teilsicherheitsbeiwerte abgedeckte Parameter genau zu analysieren und somit das Sicherheitskonzept für Beton neu zu denken. Durch die Kontrolle von streuenden Parametern und die darauffolgende Reduktion von sicherheitsbedingtem Materialverbrauch kann ein wertvoller Beitrag zum Klimaschutz und zur Schonung von natürlichen Ressourcen geleistet werden.

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Determination of steel fibres distribution in self-compacting concrete beams using X-ray computed tomography

Cited by 61 publications

References 35 publications

Mechanical Properties of Fiber-Reinforced Concrete Using Composite Binders

Mechanical Properties of Fiber-Reinforced Concrete Using Composite Binders

X-ray computed tomography of fibre reinforced self-compacting concrete as a tool of assessing its flexural behaviour

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