Assessment of Pore Fluid Effects Using Flexible Wall and Consolidation Permeameters

by Yalcin B. Acar, Louisiana State Univ, Baton Rouge, LA, USA,
Eugene D'Hollosy, Louisiana State Univ, Baton Rouge, LA, USA,



Document Type: Proceeding Paper

Part of: Geotechnical Practice for Waste Disposal '87

Abstract:

Hydraulic conductivity tests were conducted on compacted soil specimens prepared at activities of 0. 36, 0. 60, 1. 00 and 1. 39 at a fine fraction of 25 percent. Na-montmorillonite, Georgia kaolinite and fine sand were used in the mixture. Hydraulic conductivity tests are conducted with both flexible wall and consolidation permeameters. Specimens are permeated sequentially with water and acetone. The ratio of final (acetone) to initial (water) absolute hydraulic conductivity displayed a decreasing trend with increasing activity in both types of tests. Volume changes recorded in consolidation permeameters indicated that volume decrease during acetone permeation is one factor that would explain this trend. The results demonstrate the need to measure hydraulic conductivity and volume changes simultaneously in a comparative study investigating the suitability of soils for use as earthen liners.

Subject Headings: Hydraulic conductivity | Soil pollution | Permeability (soil) | Clay liners | Waste disposal | Walls | Volume measurement | Georgia | United States

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