Importance of the surface roughness of a steel fibre pulled out from cement paste by slowly increasing load cycles

Antonova, Anna; Eik, Marika; Puttonen, Jari

doi:10.1016/j.cemconcomp.2022.104799

Cited by 7 publications

(4 citation statements)

References 45 publications

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“…The provided summary of previous studies reported in Refs. [10, 11] confirmed, that the utilisation of SEM enabled to indicate the significance of fibre surface roughness on the changes in the distribution of surrounding porosity and UH grains. The increase in fibre surface roughness facilitated the uniform wetting of fibres, leading to a reduction in the porosity near fibre surface.…”

Section: Discussionmentioning

confidence: 88%

“…A detailed information about the processing of the fibre surfaces and sample preparation are provided in Refs. [10,11].…”

Section: Methodsmentioning

confidence: 99%

“…Further details of these tests are reported in Ref. [11]. The BSE images were taken from the middle part of each fibre with resolution of

1\nobreakspace \umu \mathrm{m/px}

to ensure clear contrast between steel fibre surface and cement paste.…”

Section: Methodsmentioning

confidence: 99%

“…The current report provides a reflection on the benefits of SEM investigations applied in Refs. [10, 11] and corresponding results. The discussed outcomes and SEM images were used to characterise the microstructure of the ITZ around fibres with different roughness and indicate potential reasons of the degradation behaviour of fibre‐matrix bond under non‐monotonic loading.…”

Section: Introductionmentioning

confidence: 99%

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Characterisation of bond between cement paste and steel fibres with different surface roughness using SEM

Antonova,

Eik,

Puttonen

2024

Journal of Microscopy

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The performance of cementitious composites reinforced with fibres or/and bars depends on the bond strength between inclusion and cementitious matrix. The nature of formation of fibre‐matrix bond is crucial for enhancing the reliability and utilisation of reinforced composites. The research provides a review on the recently published result about the changes in the microstructure of cement matrix surrounding steel fibres with different surface roughness, using a scanning electron microscope (SEM) coupled with k‐means clustering algorithm for image segmentation. The debonding pattern of the fibre‐matrix bond after the tensile loading cycles was discussed by observing the amount of adhered cement paste to the pulled out fibre surface with SEM. Therefore, analysis of SEM images enabled to explain the connection between the micro‐scale properties of cement paste and fibre after application of cyclic loading.

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Section: Discussionmentioning

confidence: 88%

“…A detailed information about the processing of the fibre surfaces and sample preparation are provided in Refs. [10,11].…”

Section: Methodsmentioning

confidence: 99%

“…Further details of these tests are reported in Ref. [11]. The BSE images were taken from the middle part of each fibre with resolution of