Anisotropic capillary barrier for waste site surface covers

Details Anisotropic capillary barrier for waste site surface covers Anisotropic capillary barrier for waste site surface covers

1995-03-23

1996-08-27

Suchfield, George A.

Hazardous or toxic waste destruction or containment

Containment

Secondary containment

405128, 405129, B04B 100

Patent

active

055503152

ABSTRACT:
Waste sites are capped or covered upon closure. The cover structure incorporates a number of different layers each having a contributory function. One such layer is the barrier layer. Traditionally the barriers have been compacted soil and geosynthetics. These types of barriers have not been successfully implemented in unsaturated ground conditions like those found in dry climates. Capillary barriers have been proposed as barrier layers in dry environments, but the divergence length of these barriers has been found to be inadequate. An alternative to the capillary barrier is a anisotropic capillary barrier. An anisotropic capillary barrier has an increased divergence length which results in more water being diverted laterally preventing the majority of water from percolating in a downward direction through the barrier.

REFERENCES:
patent: 5061119 (1991-10-01), Balthaus et al.
patent: 5259697 (1993-11-01), Allen et al.
patent: 5295763 (1994-03-01), Stenborg et al.
patent: 5372459 (1994-12-01), Prange et al.

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