Analysis of short fibres orientation in steel fibre-reinforced concrete (SFRC) by X-ray tomography

Suuronen, Jussi‐Petteri; Kallonen, Aki; Eik, Marika; Puttonen, Jari; Serimaa, Ritva; Herrmann, Heiko

doi:10.1007/s10853-012-6882-4

Cited by 97 publications

(44 citation statements)

References 33 publications

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“…The method has also been used to study fibre and steel fibre reinforced concrete [16,42,50,51]. The X-ray micro-tomography (μCT) basically works on the same principle as conventional CT, except that in μCT the sample is rotated instead of the X-ray source and detector.…”

Section: X-ray Computed Tomographymentioning

confidence: 99%

DC-conductivity testing combined with photometry for measuring fibre orientations in SFRC

et al. 2013

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Dissertation for the Doctoral degree to be presented with due permissions of the School of Engineering, Aalto University and Tallinn University of Technology for public examination and debate in Auditorium R1 (Rakentajanaukio 4A) at the Aalto University (Espoo, Finland) on the 4th of April 2014 at 12 noon. Aalto University School of Engineering Tallinn University of TechnologyS up e r v i s i ng p r o f e s s o r P ro f e s s o r J ari P ut t o ne n, A al t o U ni v e rs i t y , F i nl and T h e s i s a d v i s o r D r. re r. nat . H e i k o H e rrmann, T al l i nn U ni v e rs i t y o f T e c h no l o g y , E s t o ni aP r e l i mi na r y e x a mi ne r s P ro f e s s o r H o l m A l t e nb ac h , F ac ul t y o f M e c h ani c al E ng i ne e ri ng , O t t ov o n G ue ri c k e -U ni v e rs i t ät M ag d e b urg , G e rmany P ro f e s s o r K e nne t h R une s s o n, D e p art me nt o f A p p l i e d M e c h ani c s , C h al me rs U ni v e rs i t y o f T e c h no l o g y , S w e d e n O p p o ne nt P ro f e s s o r K ari n L und g re n, D e p art me nt o f C i v i l and E nv i ro nme nt al E ng i ne e ri ng , C h al me rs U ni v e rs i t y o f T e c h no l o g y , S w e d e n A al t o U ni v e rs i t y p ub l i c at i o n s e ri e s D O C T O R A L D I S S E R T A T I O N S 2 8/ 2 0 1 4© M ari k a E i k I S BN 9 7 8-9 5 2 -6 0 -5 5 9 1 -6 I S BN 9 7 8-9 5 2 -6 0 -5 5 9 2 -3 ( p d f ) I S S N -L 1 7 9 9 -4 9 34 I S S N 1 7 9 9 -4 9 34 ( p ri nt e d ) I S S N 1 7 9 9 -4 9 4 2 ( p d f ) h t t p : / / urn. f i / U R N : I S BN : 9 7 8-9 5 2 -6 0 -5 5 9 2 -3 U ni g raf i a O y H e l s i nk i 2 0 1 4 F i nl and S up e r v i s i ng p r o f e s s o r P ro f e s s o r J ari P ut t o ne n, A al t o U ni v e rs i t y , F i nl andT h e s i s a d v i s o r D r. re r. nat . H e i k o H e rrmann, T al l i nn U ni v e rs i t y o f T e c h no l o g y , E s t o ni a P r e l i mi na r y e x a mi ne r s P ro f e s s o r H o l m A l t e nb ac h , F ac ul t y o f M e c h ani c al E ng i ne e ri ng , O t t ov o n G ue ri c k e -U ni v e rs i t ät M ag d e b urg , G e rmany P ro f e s s o r K e nne t h R une s s o n, D e p art me nt o f A p p l i e d M e c h ani c s , C h al me rs U ni v e rs i t y o f T e c h no l o g y , S w e d e n O p p o ne nt P ro f e s s o r K ari n L und g re n, D e p art me nt o f C i v i l and E nv i ro nme nt al E ng i ne e ri ng , C h al me rs U ni v e rs i t y o f T e c h no l o g y , S w e d e n A al t o U ni v e rs i t y p ub l i c at i o n s e ri e s D O C T O R A L D I S S E R T A T I O N S 2 8/ 2 0 1 4 © M ari k a E i k I S BN 9 7 8-9 5 2 -6 0 -5 5 9 1 -6 I S BN 9 7 8-9 5 2 -6 0 -5 5 9 2 -3 ( p d f ) I S S N -L 1 7 9 9 -4 9 34 I S S N 1 7 9 9 -4 9 34 ( p ri nt e d ) I S S N 1 7 9 9 -4 9 4 2 ( p d f ) h t t p : / / urn. f i / U R N : I S BN : 9 7 8-9 5 2 -6 0 -5 5 9 2 -3 U ni g raf i a O y H e l s i nk i 2 0 1 4 F i nl and S up e r v i s i ng p r o f e s s o r P ro f e s s o r J ari P ut t o ne n, A al t o U ni v e rs i t y , F i nl and © M ari k a E i k I S BN 9 7 8-9 5 2 -6 0 -5 5 9 1 -6 I S BN 9 7 8-...

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Section: X-ray Computed Tomographymentioning

confidence: 99%

DC-conductivity testing combined with photometry for measuring fibre orientations in SFRC

et al. 2013

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“…XCT imaging is a NDT method for obtaining a large number of consecutive sectional images of the internal structure of the specimens. It has been successfully used in several previous studies to characterize the mechanical properties of cement-based materials [22,26,41,44] while taking into consideration air-voids volume, spatial distribution of air and clogging.…”

Section: Introductionmentioning

confidence: 99%

Steel fibre spacing in self-compacting concrete precast walls by X-ray computed tomography

et al. 2014

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In the paper, a research programme focused on determination of steel fibre dispersion in self-compacting concrete using the X-ray computed tomography method is presented. Large scale specimens were cast (in the form of walls 1.2 m 9 1.2 m 9 0.15 m), containing different types of steel fibre. The tests were conducted on beam specimens cut from each wall. Both traditional destructive tests (compressive strength, three point bending) and non-destructive tests (X-ray computed tomography imaging followed by image analysis) were performed. The X-ray computed tomography method allowed to precisely determine fibre dispersion in the whole volume of the walls. These results were compared with mechanical properties of cut beams and their original location in the walls. Differences in fibre volume and dispersion between top and bottom parts of the walls were observed. The influence of the fibre type and the casting point location was also significant. Longer fibres became more effectively orientated in parallel to the bending loading direction, resulting in enhancement of the mechanical properties of the concrete. Tests on 16 beams (cut from each wall), through load-deflection relations, provided a thorough picture of mechanical uniformity of the material properties inside the walls. The X-ray computed tomography imaging proved to be intuitive and accurate in the assessment of steel fibre dispersion.

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“…X-ray Computed Tomography (CT) scans have been also widely employed in the last decade: as a matter of fact, they allow effective 3D visualization of the fiber network inside a FRC specimen [13,39,[54][55][56][57][58][59][60][61][62], also in the case of non-conductive fibers [63], for which electrical methods cannot be applied. Limits on the specimen size and the need of an image analysis software for the quantitative processing of the collected data are so far the main concern in promoting the method for wider use, especially at the industrial scale.…”

Section: Non-destructive Monitoring Of Fiber Dispersionmentioning

confidence: 99%

Structural elements made with highly flowable UHPFRC: Correlating computational fluid dynamics (CFD) predictions and non-destructive survey of fiber dispersion with failure modes

Ferrara

Cremonesi

Faifer

et al. 2017

Engineering Structures

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Structural design with highly flowable Fibre Reinforced Concrete has to duly take into account the preferential alignment of fibers, which can be governed through the rheological properties of the fluid mixture and the casting process and by the geometry of the structure. The possibility of predicting the fiber alignment, by tailoring the casting process, and of non-destructively monitoring it, can foster more efficient structural applications and design approaches. Focusing on UHPFRC slabs with pre-arranged casting defects, the flowinduced alignment of the fibers has been predicted by means of a suitable CFD modelling approach and hence monitored via a non-destructive method based on magnetic inductance properties of the fiber reinforced composite. The comparison between the assessed data on the fibre orientation and the crack patterns as visualized by image analysis supports the effectiveness of casting flow modelling and non-destructive fiber dispersion monitoring in supporting the structural design of elements made with highly flowable fiber reinforced cementitious composites. Response to the reviewers of the manuscript ENGSTRUCT D-16-00912Structural elements made with highly flowable UHPFRC:can Computational Fluid Dynamics (CFD) and non-destructive survey of fiber dispersion complement structural design in predicting failure modes? submitted for publication to Engineering StructuresThe authors thank the reviewers for the time they have dedicated to read their manuscript and for the insightful comments they have made and for the overall evaluation of the manuscript.The authors have taken in high consideration all the comments, mainly made by the second reviewers, and have addressed them in the revised version of the manuscript, which is now resubmitted.In detail:RESPONSE TO REVIEWER 1 -The authors agree that citing "structural design" in the title may rise some expectations in the reader which the paper does not fully address. In view of this the tile has been modified as follows Structural elements made with highly flowable UHPFRC: correlating Computational FluidDynamics (CFD) predictions and non-destructive survey of fiber dispersion with failure modes? (see also response to 1st general remark of reviewer 2) -The thickness of the slab (30 mm) has been declared -Reference [93] (which has now become reference [94]) contains details about the test set-up and the mechanical test results with elaboration of the digital image correlation measurements of the cracks, which in this paper are taken as reference and simply compared with CFD predictions and ND fiber dispersion monitoring. -The citation by Svec has been added. As for the other reference cited by the reviewer, the authors are doubtful whether to cite or not since it is likely an internal publication which is not indexed nor widely available. -With reference to the slab with the defect at 1/3 of the side it is not true that the defect does not affect the crack pattern; even in the major crack does not develop along the casting defect line, the...

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Analysis of short fibres orientation in steel fibre-reinforced concrete (SFRC) by X-ray tomography

Cited by 97 publications

References 33 publications

DC-conductivity testing combined with photometry for measuring fibre orientations in SFRC

DC-conductivity testing combined with photometry for measuring fibre orientations in SFRC

Steel fibre spacing in self-compacting concrete precast walls by X-ray computed tomography

Structural elements made with highly flowable UHPFRC: Correlating computational fluid dynamics (CFD) predictions and non-destructive survey of fiber dispersion with failure modes

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