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

An alternative approach for determining suction of polyethyleneglycols for soil testing

Lieske, W., Tripathy, S. ORCID:, Baille, W. and Schanz, T. 2020. An alternative approach for determining suction of polyethyleneglycols for soil testing. Géotechnique Letters 10 (1) , pp. 45-49. 10.1680/jgele.19.00017

[thumbnail of Tripathy S - An alternative approach to determine ....pdf] PDF - Accepted Post-Print Version
Download (278kB)


Determination of suction of Polyethylenglycol (PEG) is vital for unsaturated laboratory testing that use osmotic technique to study the hydro-mechanical behaviour of fine-grained soils. To date, suctions of PEG solutions are either experimentally measured or calculated from established semi-empirical relationships between concentration of PEG and suction. The current paper presents an alternative approach to determine suctions of aqueous PEG solutions based on a modified Flory-Huggins equation. Using the proposed method, suctions of various PEGs can be precisely calculated by knowing the average molar mass, concentration of the solution and an interaction coefficient which represents the quality of PEG-solvent interaction. The suggested method relies on the characteristics and thermodynamical behaviour of PEGs in solution. Experimental data of several PEG-water mixtures reported in the literature were analysed. The superiority of the current approach remains with abilities to verify molar of mass of PEGs and estimate suctions of PEG at high concentrations.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Publisher: Thomas Telford (ICE Publishing)
ISSN: 2045-2543
Date of First Compliant Deposit: 29 July 2019
Date of Acceptance: 5 July 2019
Last Modified: 06 Nov 2023 20:24

Citation Data

Cited 3 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