Velocity gradients of concrete mass reconstructed based on measured fibre orientations in hardened concrete

Marika Eik; Christina Papenfuss

doi:10.1016/j.compstruct.2019.111008

Velocity gradients of concrete mass reconstructed based on measured fibre orientations in hardened concrete

Marika Eik, Christina Papenfuss

Research output: Contribution to journal › Article › Scientific › peer-review

1 Citation (Scopus)

Abstract

During the casting of steel fibre reinforced concrete (SFRC) the orientation of fibres is influenced by flow dynamics of concrete mass. A simple theoretical model presented allows the calculation of velocity gradient matrices for concrete mass based on steel fibre orientations measured in the hardened concrete samples taken from the different regions in the slabs. This made it possible to examine the realistic trends of the flow near the formwork or free surface or in the bulk material. Eigenvalues and eigenvectors of the matrices show the directions of the maximal and minimal velocity changes, which can be compared in different positions of the slabs. The outcomes of the study can contribute to controlled production technology of SFRC.

Original language	English
Article number	111008
Journal	Composite Structures
Volume	225
DOIs	https://doi.org/10.1016/j.compstruct.2019.111008
Publication status	Published - 1 Oct 2019
MoE publication type	A1 Journal article-refereed

Keywords

fibres
reinforced cement/plaster
anisotrophy
rheological properties
Reinforced cement/plaster
Anisotropy
Fibres
Rheological properties

Access to Document

10.1016/j.compstruct.2019.111008

Link to publication in Scopus

Embargoed Document

ENG_Eik_Velocity_gradients_COST
Accepted author manuscript, 2.57 MB
Licence: CC BY-NC-ND
Embargo ends: 29/05/2021

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1 Finished

Experimentally validated approach for simulating cracking in steel fibre reinforced concrete
Eik, M.
01/09/2015 → 21/07/2019
Project: Academy of Finland: Other research funding

Cite this

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title = "Velocity gradients of concrete mass reconstructed based on measured fibre orientations in hardened concrete",

abstract = "During the casting of steel fibre reinforced concrete (SFRC) the orientation of fibres is influenced by flow dynamics of concrete mass. A simple theoretical model presented allows the calculation of velocity gradient matrices for concrete mass based on steel fibre orientations measured in the hardened concrete samples taken from the different regions in the slabs. This made it possible to examine the realistic trends of the flow near the formwork or free surface or in the bulk material. Eigenvalues and eigenvectors of the matrices show the directions of the maximal and minimal velocity changes, which can be compared in different positions of the slabs. The outcomes of the study can contribute to controlled production technology of SFRC.",

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T1 - Velocity gradients of concrete mass reconstructed based on measured fibre orientations in hardened concrete

AU - Eik, Marika

AU - Papenfuss, Christina

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N2 - During the casting of steel fibre reinforced concrete (SFRC) the orientation of fibres is influenced by flow dynamics of concrete mass. A simple theoretical model presented allows the calculation of velocity gradient matrices for concrete mass based on steel fibre orientations measured in the hardened concrete samples taken from the different regions in the slabs. This made it possible to examine the realistic trends of the flow near the formwork or free surface or in the bulk material. Eigenvalues and eigenvectors of the matrices show the directions of the maximal and minimal velocity changes, which can be compared in different positions of the slabs. The outcomes of the study can contribute to controlled production technology of SFRC.

AB - During the casting of steel fibre reinforced concrete (SFRC) the orientation of fibres is influenced by flow dynamics of concrete mass. A simple theoretical model presented allows the calculation of velocity gradient matrices for concrete mass based on steel fibre orientations measured in the hardened concrete samples taken from the different regions in the slabs. This made it possible to examine the realistic trends of the flow near the formwork or free surface or in the bulk material. Eigenvalues and eigenvectors of the matrices show the directions of the maximal and minimal velocity changes, which can be compared in different positions of the slabs. The outcomes of the study can contribute to controlled production technology of SFRC.

KW - fibres

KW - reinforced cement/plaster

KW - anisotrophy

KW - rheological properties

KW - Reinforced cement/plaster

KW - Anisotropy

KW - Fibres

KW - Rheological properties

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DO - 10.1016/j.compstruct.2019.111008

M3 - Article

VL - 225

JO - Composite Structures

JF - Composite Structures

SN - 0263-8223

M1 - 111008

ER -

Velocity gradients of concrete mass reconstructed based on measured fibre orientations in hardened concrete

Abstract

Keywords

Access to Document

Embargoed Document

Experimentally validated approach for simulating cracking in steel fibre reinforced concrete

Cite this