Effects of Wet-dry and Intermittent Freeze-thaw Cycles on the Volume Change Behaviour of Some Geomaterials
الباحث الأول:
Snehasis TRIPATHY
الباحثين الآخرين:
, Osama Mahdi AL-HUSSAINI, Peter J CLEALL, Stephen W REES, Vinay Kumar GADI
المجلة:
Geo-Resilience 2023 Conference, Cardiff, Wales
تاريخ النشر:
1 يناير، 2024
مختصر البحث:
Climate change has led to more extreme weather events during the last decades. Seasonally hot weather regions
have experienced harsh winters. Similarly, global warming has contributed to raising the mean summer
temperature in cold regions. Geomate…
Climate change has led to more extreme weather events during the last decades. Seasonally hot weather regions
have experienced harsh winters. Similarly, global warming has contributed to raising the mean summer
temperature in cold regions. Geomaterials in various civil engineering applications are expected to experience
changes in environmental loading conditions and may undergo freezing, thawing, wetting and drying processes
accompanied by volume change which may cause severe distress to many civil engineering structures. In this
paper the effects of wet-dry cycles accompanied by intermittent freeze-thaw cycles on the volume change
behaviour of some materials (soils and industrial waste) were studied. Compacted samples of the materials were
prepared, subjected to several wet-dry cycles and then exposed to one cycle of freeze-thaw. The patterns of
wet-dry and freeze-thaw cycles were repeated. The intermittent freeze-thaw cycles destabilised the equilibrium
strain that was achieved by the materials during the previous wet-dry cycles; however, a new equilibrium in
terms of vertical strain was attained by the materials with an increasing number of wet-dry cycles, but with a
reduced equilibrium strain. Wet-dry cycles caused an increase in the frost heave and thaw settlement for the
materials studied indicating that the hydraulic conductivity increased due to exposure of the materials to
increasing number of wet-dry cycles
