Abstract

A method of improving hydraulic performance of clay comprising its modification by the addition to the clay of a silica component containing free silica or a siliceous material. The clay is advantageously a swelling sodium bentonite clay with smectite content greater than 70 wt%. The modified clay may be employed in geosynthetic clay liners used for the containment of strong alkaline solutions as well as other barrier systems.

IPC Classes  ?

• E02D 17/00 - ExcavationsBordering of excavationsMaking embankments
• B28C 1/00 - Apparatus or methods for obtaining or processing clay
• C09K 17/00 - Soil-conditioning materials or soil-stabilising materials
• B09B 1/00 - Dumping solid waste
• C04B 14/00 - Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stoneTreatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
• E02D 31/00 - Protective arrangements for foundations or foundation structuresGround foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution