Radial deformation and failure of stabilised soft clay under uniaxial compression
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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18
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SOILS AND FOUNDATIONS, Volume 62, issue 5
Abstract
This study examined the performances of four newly developed binders in stabilising soft Finnish clay by considering both the mechanical behaviour and environmental effect (i.e., carbon footprint). Thirty-six compacted clay-binder mixtures were investigated via uniaxial compression tests, during which photogrammetric scans were performed at axial strains of 0, 1, 3, and 7.5%. The testing protocol enabled the characterisation of full-field radial deformations and fracture developments. Experimental results demonstrated that varying the amounts and types of industrial by-products used in the production of binders has substantial potential to reduce carbon footprints. In terms of radial deformations, their distributions were highly non-uniform at different heights and loading stages. Radial displacements increased continuously at axial strains smaller than 3% (corresponding to peak strength point), whereas such a continuity disappeared afterwards, and global failures appeared. Based on three-dimensional (3D) reconstructions, the observed failures were categorised into three modes: inclined shearing (IS), axial splitting (AS) and hybrid shearing-splitting (HSS). For the studied specimens, shearing was the most common mechanism leading to failure. (C) 2022 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).Description
Funding Information: The authors thank their partners (City of Helsinki, Ecolan Oy, Finnsementti and Nordkalk Oy) for providing the binders/clays. The technical group at Aalto Civil Engineering Department helped in building the photogrammetric studio. The comments of Professor Jean-Marie Fleureau on the initial draft of this paper are acknowledged. Data presented in the present study are available from the corresponding author upon request. Publisher Copyright: © 2022
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Li, Z S, Zhang, Y, Janiszewski, M & Korkiala-Tanttu, L 2022, 'Radial deformation and failure of stabilised soft clay under uniaxial compression', SOILS AND FOUNDATIONS, vol. 62, no. 5, 101213. https://doi.org/10.1016/j.sandf.2022.101213