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Use of Posidonia oceanica ash in stabilization of expansive soils

journal contribution
posted on 31.07.2018, 00:00 by Mona MalekzadehMona Malekzadeh, H Bilsel
Posidonia oceanica (PO) is the most plentiful seaweed of the Mediterranean Sea, which grows all along the coastal areas, forming widespread meadows. The leaf rejuvenation process of Posidonia oceanica typically occurs in fall when an increase in wave action causes the dead seaweeds to be transported and usually piled up along the coastal areas. This paper investigates the effect of PO ash stabilization on behaviour of an expansive clay. The ash was obtained by combustion of crushed PO pieces in a muffle furnace at 550°C. Atterberg limits, linear shrinkage, particle size distribution, one-dimensional swell, and unconfined compression tests have been carried out on natural soil as well as soil mixtures with 5% and 10% PO ash. There has been no significant improvement in the soil properties with 5% ash inclusion, whereas 10% ash has noticeably reduced the swell amount and increased the compressive strength. It is therefore concluded that there is a potential for the use of PO ash in geotechnical engineering applications.

History

Volume

32

Issue

2

Start Page

179

End Page

186

eISSN

1521-0618

ISSN

1064-119X

Publisher

Taylor & Francis

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Eastern Mediterranean University, Turkey

Era Eligible

Yes

Journal

Marine Georesources and Geotechnology