Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Volume Change Effects on Solute Transport in Clay Under Consolidation
This paper evaluates the effect of volume change due to consolidation on one-dimensional transport of contaminants. The rate of consolidation and excess pore pressure dissipation result in a transient, nonlinear advective component of transport through clay. Consolidation experiments were conducted on kaolinite samples prepared at 50% water content. Bromide, a non reactive tracer, was mixed with the upper half of the kaolinite sample at concentration of 960 mg/L. Flux of bromide as a result of consolidation was monitored in the water surrounding the kaolinite sample. The results show continuous flow of bromide as a result of water drainage by consolidation. The bromide mass flux compared well with consolidation rate and ceased at the end of the consolidation process. A formulation for the simultaneous consolidation and diffusion of solutes in clays, solved by finite difference, is also presented. A hypothetical case is solved to demonstrate the effect of consolidation under single and double drainage on contaminant transport and breakthrough. The results show that consolidation in doubly drained clay impacts concentration profiles, but does not significantly impact breakthrough of the diffusive flux. Consolidation under single drainage conditions significantly impacts the diffusional flux.
Volume Change Effects on Solute Transport in Clay Under Consolidation
This paper evaluates the effect of volume change due to consolidation on one-dimensional transport of contaminants. The rate of consolidation and excess pore pressure dissipation result in a transient, nonlinear advective component of transport through clay. Consolidation experiments were conducted on kaolinite samples prepared at 50% water content. Bromide, a non reactive tracer, was mixed with the upper half of the kaolinite sample at concentration of 960 mg/L. Flux of bromide as a result of consolidation was monitored in the water surrounding the kaolinite sample. The results show continuous flow of bromide as a result of water drainage by consolidation. The bromide mass flux compared well with consolidation rate and ceased at the end of the consolidation process. A formulation for the simultaneous consolidation and diffusion of solutes in clays, solved by finite difference, is also presented. A hypothetical case is solved to demonstrate the effect of consolidation under single and double drainage on contaminant transport and breakthrough. The results show that consolidation in doubly drained clay impacts concentration profiles, but does not significantly impact breakthrough of the diffusive flux. Consolidation under single drainage conditions significantly impacts the diffusional flux.
Volume Change Effects on Solute Transport in Clay Under Consolidation
Alshawabkeh, Akram N. (Autor:in) / Rahbar, Nima (Autor:in) / Sheahan, Thomas C. (Autor:in) / Tang, Guoping (Autor:in)
Geo Jordan Conference 2004 ; 2004 ; Irbid, Jordan
Geo Jordan 2004 ; 105-115
11.06.2004
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Volume Change Effects on Solute Transport in Clay Under Consolidation
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