Mechanical Resistance due to Shearing of Partially Wet Granular Media

Mixing granular media with a given amount of liquid is an operation conducted and used intensively for the preparation of concrete. The power and time required to obtain good homogeneity of the granular paste are known to have a complex relationship with the physical properties of the particles, wit...

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Main Authors: Driss Oulahna, Romain Collet, Alain de Ryck
Format: Article
Language:English
Published: Hosokawa Powder Technology Foundation 2013-12-01
Series:KONA Powder and Particle Journal
Subjects:
Online Access:https://www.jstage.jst.go.jp/article/kona/30/0/30_2013012/_html/-char/en
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spelling doaj-5f5a04a1573741cda44d1b34778b3f752021-02-03T00:54:14ZengHosokawa Powder Technology FoundationKONA Powder and Particle Journal0288-45342187-55372013-12-0130010911810.14356/kona.2013012konaMechanical Resistance due to Shearing of Partially Wet Granular MediaDriss Oulahna0Romain Collet1Alain de Ryck2Université de Toulouse, Mines Albi, CNRS, Centre RAPSODEEUniversité de Toulouse, Mines Albi, CNRS, Centre RAPSODEEUniversité de Toulouse, Mines Albi, CNRS, Centre RAPSODEEMixing granular media with a given amount of liquid is an operation conducted and used intensively for the preparation of concrete. The power and time required to obtain good homogeneity of the granular paste are known to have a complex relationship with the physical properties of the particles, with the liquid and with the mixer design. In this paper some of these issues are addressed by evaluating the shear resistance of a granular paste. Using model spherical materials (glass beads) and ground and sieved minerals (calcite CaCO3), we investigate experimentally the impact of the particle size, liquid amount and morphology of the particles.From quasi-static experiments in shear cells, different regimes of shear resistance are revealed. In dry conditions, van der Waals’ forces dominate. In wet conditions, a capillary or consolidation regime where shear resistance is dominated by capillary forces is strongly impacted by the morphology of the particles and by the formation of texture. These regimes are qualitatively observed in a bowl mixer for which the variation of the current intensity correlates with the shear resistance observed in quasi-static experiments.https://www.jstage.jst.go.jp/article/kona/30/0/30_2013012/_html/-char/enwet granular mixingshearingquasi-static systempowder mechanics
collection DOAJ
language English
format Article
sources DOAJ
author Driss Oulahna
Romain Collet
Alain de Ryck
spellingShingle Driss Oulahna
Romain Collet
Alain de Ryck
Mechanical Resistance due to Shearing of Partially Wet Granular Media
KONA Powder and Particle Journal
wet granular mixing
shearing
quasi-static system
powder mechanics
author_facet Driss Oulahna
Romain Collet
Alain de Ryck
author_sort Driss Oulahna
title Mechanical Resistance due to Shearing of Partially Wet Granular Media
title_short Mechanical Resistance due to Shearing of Partially Wet Granular Media
title_full Mechanical Resistance due to Shearing of Partially Wet Granular Media
title_fullStr Mechanical Resistance due to Shearing of Partially Wet Granular Media
title_full_unstemmed Mechanical Resistance due to Shearing of Partially Wet Granular Media
title_sort mechanical resistance due to shearing of partially wet granular media
publisher Hosokawa Powder Technology Foundation
series KONA Powder and Particle Journal
issn 0288-4534
2187-5537
publishDate 2013-12-01
description Mixing granular media with a given amount of liquid is an operation conducted and used intensively for the preparation of concrete. The power and time required to obtain good homogeneity of the granular paste are known to have a complex relationship with the physical properties of the particles, with the liquid and with the mixer design. In this paper some of these issues are addressed by evaluating the shear resistance of a granular paste. Using model spherical materials (glass beads) and ground and sieved minerals (calcite CaCO3), we investigate experimentally the impact of the particle size, liquid amount and morphology of the particles.From quasi-static experiments in shear cells, different regimes of shear resistance are revealed. In dry conditions, van der Waals’ forces dominate. In wet conditions, a capillary or consolidation regime where shear resistance is dominated by capillary forces is strongly impacted by the morphology of the particles and by the formation of texture. These regimes are qualitatively observed in a bowl mixer for which the variation of the current intensity correlates with the shear resistance observed in quasi-static experiments.
topic wet granular mixing
shearing
quasi-static system
powder mechanics
url https://www.jstage.jst.go.jp/article/kona/30/0/30_2013012/_html/-char/en
work_keys_str_mv AT drissoulahna mechanicalresistanceduetoshearingofpartiallywetgranularmedia
AT romaincollet mechanicalresistanceduetoshearingofpartiallywetgranularmedia
AT alainderyck mechanicalresistanceduetoshearingofpartiallywetgranularmedia
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