Hydraulic properties of crushed rock-bentonite mixtures used as low permeability materials in mine waste confinement structures
Yosra Hfaiedh, Vincent Boulanger-Martel, Bruno Bussière
In the proceedings of: GeoSaskatoon 2023: 76th Canadian Geotechnical ConferenceSession: Geoenvironmental 3
ABSTRACT: This study aims to characterize and optimize the hydraulic properties of crushed-rock bentonite mixtures for potential use as construction materials in mine wastes confinement structures. Several permeability tests were performed to assess the effects of bentonite type, bentonite content, crushed rock grain-size distribution and freeze-thaw cycle on the saturated hydraulic conductivity (ksat) of crushed rock-bentonite mixtures. Tests results show that the ksat of the tested mixtures varied from 5.8×10-7 to 3.5×10-8 cm/s for bentonite contents ranging from 5.0 to 9.0%. Crushed rock-bentonite mixtures with higher bentonite contents and higher uniformity coefficients generally resulted in lower measured ksat. The impact of freeze-thaw cycles on the ksat of the tested mixtures was limited. The results of this study provide insights on the factors governing the ksat of crushed-rock bentonite mixtures and their potential use as low permeability materials in confinement structures.
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Hfaiedh, Yosra, Boulanger-Martel, Vincent, Bussière, Bruno (2023) Hydraulic properties of crushed rock-bentonite mixtures used as low permeability materials in mine waste confinement structures in GEO2023. Ottawa, Ontario: Canadian Geotechnical Society.
@inproceedings{Hfaiedh_GEO2023_119,
author = {{Hfaiedh, Yosra}, {Boulanger-Martel, Vincent}, {Bussière, Bruno}}
title = {Hydraulic properties of crushed rock-bentonite mixtures used as low permeability materials in mine waste confinement structures }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
title = {Hydraulic properties of crushed rock-bentonite mixtures used as low permeability materials in mine waste confinement structures }
booktitle = {Proceedings of the 76th Canadian Geotechnical Conference}
year = {2023}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }