The positive effects of silica fume on the permeability, swelling pressure and compressive strength of natural clay liners

http://labmem.unsl.edu.ar/Publicados/Fran_10.pdf

Long term hydraulic conductivity of compacted soils permeated with landfill leachate.

Diffusion of contaminants can play a significant if not dominant role in many applications encountered within the field of environmental geotechnics. The objective of this paper is to provide an ov...

The ISSMGE Kerry Rowe Lecture: The role of diffusion in environmental geotechnics1

Long-term characterization, lagoon treatment and migration potential of landfill leachate: a case study in an active Italian landfill

Severe modification of geotechnical properties of soils mainly occurred due to physical and/or physicochemical interactions between soil and contaminants such as oils, landfill leachate, and fertilizers. However, the degree of natural soil alteration in terms of permeability, shear strength, compaction, Atterberg limits, consolidation, and compressibility is dependent on contaminant and soil type. A sharp reduction in natural soil permeability occurred due to the migration of particle fragments of the contaminant and clogging the pores between soil particles. Nevertheless, the permeability of the contaminated soil with acidic and alkaline solutions could be increased due to the dissolution of the soil minerals. Physical and physicochemical interactions are predominant in granular and fine-grained soils, respectively. Atterberg limits of the natural soil are deteriorated due to physicochemical interaction with contaminants. Moreover, some contaminants tend to reduce the thickness of the diffuse double layer (DDL), resulting in soil shrinkage and causing a decrease in repulsive forces, thus promoting flocculation of particles.

Jens Baumann

Papers

Clay membrane made of natural high plasticity clay:: Leachate migration due to advection and diffusion