Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

Vapour transfer in unsaturated compacted bentonite

Cleall, Peter John ORCID:, Singh, Rao M. and Thomas, Hywel Rhys ORCID: 2013. Vapour transfer in unsaturated compacted bentonite. Géotechnique 63 (11) , pp. 957-964. 10.1680/geot.12.P.147

This is the latest version of this item.

[thumbnail of Cleall 2013.pdf]
PDF - Published Version
Download (426kB) | Preview


Results of an experimental and theoretical investigation of heat and moisture movement in unsaturated MX-80 bentonite are presented. A thermo-hydraulic cell that allows measurement of transient temperatures and facilitates the determination of pseudo-transients of moisture content, dry density and chemical composition has been used to perform thermal gradient tests. Results of a number of tests are presented, and observation of the accumulation of chloride ions near the hot end clearly indicates that there is a cycle of vapour and liquid moisture movement, with vapour moving from hotter to cooler regions, condensing, and then moving as liquid towards the hotter regions. An empirical method is applied to calculate approximate vapour fluxes using measured variations in chloride ion concentration and moisture content with time. The vapour fluxes calculated empirically are found to be lower than those determined by some existing vapour flow theories. Subsequently, an existing vapour flow model is modified to represent the observed vapour fluxes more closely.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Uncontrolled Keywords: partial saturation; laboratory tests; temperature effects
Additional Information: Pdf uploaded in accordance with publisher's policy at (accessed 24/04/2014).
Publisher: ICE Publishing
ISSN: 0016-8505
Date of First Compliant Deposit: 30 March 2016
Last Modified: 12 Aug 2023 16:25

Available Versions of this Item

Citation Data

Cited 16 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics