Use of Posidonia Oceanica ash in stabilization of expansive soils

Malekzadeh, Mona, and Bilsel , Huriye (2014) Use of Posidonia Oceanica ash in stabilization of expansive soils. Marine Georesources & Geotechnology, 32 (2). 179 -186.

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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.

Item ID: 45420
Item Type: Article (Research - C1)
ISSN: 1521-0618
Keywords: one-dimensional swell, Posidonia oceanica, swelling soils, unconfined compressive strength
Date Deposited: 13 Sep 2016 00:30
FoR Codes: 04 EARTH SCIENCES > 0405 Oceanography > 040599 Oceanography not elsewhere classified @ 10%
09 ENGINEERING > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering @ 50%
09 ENGINEERING > 0914 Resources Engineering and Extractive Metallurgy > 091402 Geomechanics and Resources Geotechnical Engineering @ 40%
SEO Codes: 96 ENVIRONMENT > 9699 Other Environment > 969999 Environment not elsewhere classified @ 100%
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