The effects of fines on the hydraulic properties of well graded materials

Katherine Kwa, Javad Ghorbani, David Airey

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

The maritime transportation of iron ore and other metallic ores has been of increasing concern as in recent years, several bulk carriers, their cargo and around 200 lives have been lost but the mechanics behind the liquefaction of the cargo is still not well understood. These cargoes are transported at relatively low densities below a certain Transportable Moisture Limit (TML) as specified in the International Maritime Solid Bulk Cargoes (IMSBC) standards to ensure that the ore’s degree of saturation is less than 70%. Studies are currently investigating the cyclic unsaturated soil behaviour and the moisture movements that occur during liquefaction of moist ores that can be caused by wave rocking motions during maritime transportation. Determining the hydraulic properties is necessary in developing a constitutive model that captures the hydro-mechanical response of these materials when subjected to unsaturated cyclic loading conditions. The hydraulic properties, including the permeabilities and soil water characteristic curves (SWCCs), of materials similar in grading to the ores, containing a range of particle sizes less than 9.5 mm and fines (<75 휇m) contents of 18%, 28% and 60% will be presented and the implications of the measured properties on the likelihood of cargo liquefaction will be discussed.
Original languageEnglish
Title of host publication7th International Conference on Unsaturated Soils 2018 (UNSAT 2018)
Number of pages6
Publication statusPublished - 2018
Externally publishedYes
EventInternational Conference on Unsaturated Soils 2018 - Hong Kong, China
Duration: 3 Aug 20185 Aug 2018
Conference number: 7th

Conference

ConferenceInternational Conference on Unsaturated Soils 2018
Abbreviated titleUNSAT 2018
CountryChina
CityHong Kong
Period3/08/185/08/18

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