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Thermohydromechanical behaviour of soils and soil structure interfaces 223
Figure 5.9 Accumulation of thermoplastic deformation at 20 C after each thermal cycle. Redrawn
after Di Donna, A., Laloui, L., 2015. Response of soil subjected to thermal cyclic loading: experimental
and constitutive study. Eng. Geol. 190 (1), 65 76.
Figure 5.10 Effect of thermal cycles on the oedometric curve of a fine-grained soil. Redrawn after
Di Donna, A., Laloui, L., 2015. Response of soil subjected to thermal cyclic loading: experimental and
constitutive study. Eng. Geol. 190 (1), 65 76.
to point 4 in Fig. 5.10) and then undergoes plasticity again, joining the normal com-
pression line (NCL). This behaviour results from the thermally induced overconsoli-
dation caused by the heating of fine-grained soils under NC conditions, which
requires (at the same temperature) a higher stress state to undergo plasticity (again)
after thermal cycling.
