Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Experimental investigation of the impact of salinity on Champlain Sea clay
This paper presents an experimental investigation of the impact of leaching on the geotechnical properties of Champlain Sea clay. Champlain Sea clay has a high salinity level in its pore fluid. A leaching apparatus was developed to leach a series of 15-cm diameter undisturbed Champlain Sea clay samples to different salinity levels. A series of geotechnical tests were conducted on leached samples. The salinity levels investigated in this study ranged from an initial salinity value of 9.50 g/l to as low as 0.35 g/l. Based on test results, it was found that leaching causes profound and significant property changes in Champlain Sea clay. It results in a greater reduction for the liquid limit than that of the plastic limit. In the study, the plasticity index was reduced by 14% to 31% due to leaching, while the liquidity index reduced by 4% to 26%. Leaching also causes an increase in the sensitivity of the clay since leaching reduces more the remolded shear strength of the clay than that of undisturbed shear strength. Within the studied salinity levels, leaching increased the compressibility of Champlain Sea clay by 20% and reduced the preconsolidation pressure of the clay sample by one-third. At the same time, leaching reduced the shear strength by more than 40% and undrained shear modulus of Champlain Sea clay by about 50%.
Experimental investigation of the impact of salinity on Champlain Sea clay
This paper presents an experimental investigation of the impact of leaching on the geotechnical properties of Champlain Sea clay. Champlain Sea clay has a high salinity level in its pore fluid. A leaching apparatus was developed to leach a series of 15-cm diameter undisturbed Champlain Sea clay samples to different salinity levels. A series of geotechnical tests were conducted on leached samples. The salinity levels investigated in this study ranged from an initial salinity value of 9.50 g/l to as low as 0.35 g/l. Based on test results, it was found that leaching causes profound and significant property changes in Champlain Sea clay. It results in a greater reduction for the liquid limit than that of the plastic limit. In the study, the plasticity index was reduced by 14% to 31% due to leaching, while the liquidity index reduced by 4% to 26%. Leaching also causes an increase in the sensitivity of the clay since leaching reduces more the remolded shear strength of the clay than that of undisturbed shear strength. Within the studied salinity levels, leaching increased the compressibility of Champlain Sea clay by 20% and reduced the preconsolidation pressure of the clay sample by one-third. At the same time, leaching reduced the shear strength by more than 40% and undrained shear modulus of Champlain Sea clay by about 50%.
Experimental investigation of the impact of salinity on Champlain Sea clay
Liu, Jinyuan (Autor:in) / Afroz, Mohammad (Autor:in) / Ahmad, Ali (Autor:in)
Marine Georesources & Geotechnology ; 39 ; 494-504
03.04.2021
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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