Micromechanical behaviour in shearing of reproduced flat LBS grains with strong and weak artificial bonds
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
---|---|
Pages (from-to) | 1355–1376 |
Journal / Publication | Acta Geotechnica |
Volume | 16 |
Issue number | 5 |
Online published | 9 Nov 2020 |
Publication status | Published - May 2021 |
Link(s)
Abstract
The shearing behaviour of reproduced flat LBS grains artificially bonded with ordinary Portland cement (OPC) and plaster of Paris (PP) was examined using micromechanical experiments. Monotonic shearing tests showed a distinct variation in the load–displacement relationship at low, medium and high normal loads, and a nonlinear shear strength envelope was proposed. For OPC-bonded sand grains, a brittle–ductile transition at 20–30 N normal load was observed and three breakage mechanisms in shearing (chipping, shear cracks and crushing) were distinguished in accordance with the changes in the load–displacement curves. OPC-bonded sands showed a predominant dilation at lower normal loads, whereas PP-bonded sands were highly compressive. Based on previously published works using element-scale tests, a new mechanism for dilation under micromechanical testing was proposed in the study. Cyclic shearing tests were conducted on OPC-bonded sands, and the effects of increased displacement amplitude and normal load were highlighted.
Research Area(s)
- Artificial bonding, Cemented sands, Dilation, Micromechanics, Nonlinear strength
Citation Format(s)
Micromechanical behaviour in shearing of reproduced flat LBS grains with strong and weak artificial bonds. / Kasyap, S. S.; Senetakis, K.; Coop, M. R. et al.
In: Acta Geotechnica, Vol. 16, No. 5, 05.2021, p. 1355–1376.
In: Acta Geotechnica, Vol. 16, No. 5, 05.2021, p. 1355–1376.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review