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Hydraulic conductivity of sediment cubes before and after freezing

Author:
Vaitl, Tobias, Gökpinar, Thorsten, Englert, Andreas
Source:
Grundwasser 2014 v.19 no.3 pp. 201-209
ISSN:
1430-483X
Subject:
freezing, gravel, hydraulic conductivity, porous media, sand, thawing
Abstract:
To study flow and transport processes in heterogeneous porous media, frozen sediment cubes that were assembled in sandbox experiments may represent a viable procedure. In this investigation, it was important to find out how flow and transport properties would be modified by sediment freezing. In this study, a medium sand, a coarse sand and a fine gravel were investigated to find out to what extent the hydraulic conductivities might change before and after freezing. For this purpose, a cubic Darcy-cell was developed. The results of the study show that it is possible to produce 10 × 10 × 10 cm frozen sediment cubes with the presented apparatus. The study also suggests that freezing and subsequent thawing only caused small changes in hydraulic conductivity of the investigated sediments.
Agid:
814083