Compaction effect on the gas diffusion coefficient in soils

Research output: Contribution to journalArticlepeer-review

100 Scopus citations

Abstract

This study investigated the effects of compaction in four soils. The experiment involved equilibrating bulk loose soil to a known matric potential in a pressure chamber, compressing the equilibrated moist soil in metal cores at a given applied stress, and measuring the concentration of N2 diffusing through these cores into a diffusion chamber. The diffusion coefficient of N2 varied exponentially as a function of air-filled porosity and was nearly the same function for all four soils. A model for predicting the diffusion coefficient of gases in soils based on the diffusion coefficient of individual soil constituents overpredicted the coefficient for all four soils. A reduction factor suggested in the literature to account for blocked air slightly improved predictions. -from Authors

Original languageEnglish (US)
Pages (from-to)1743-1750
Number of pages8
JournalSoil Science Society of America Journal
Volume56
Issue number6
DOIs
StatePublished - 1992

Fingerprint Dive into the research topics of 'Compaction effect on the gas diffusion coefficient in soils'. Together they form a unique fingerprint.

Cite this