Water retention behavior of palm oil mixed kaolin

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This paper presents a laboratory study to evaluate the effect of increasing palm-oil content on the water-retention properties of kaolin clay. The amount of palm oil added to dry kaolin varied up to 40% by dry weight of kaolin, at intervals of 10%. Two separate experimental techniques on thirty independent samples were employed to capture the water-retention properties over a range of soil suction (ψ) values; a stress-controlled volumetric pressure plate extractor to capture measurements in the range of 101< ψ<103 kPa and chilled-mirror dew-point potentiometer for ψ values up to 106 kPa. The measured data on soil suction-water content (ψ−w) relationship for the palm oil mixed kaolin samples (POMK) were analysed using van Genuchten model. The results of this study show a reduction in the air-entry values and water holding capacity with increasing palm oil content. The discussions draw attention to contact angle and water repellency of the POMK samples as key factors dictating the water retention behavior of kaolin.

Original languageEnglish
Title of host publicationNovel Issues on Unsaturated Soil Mechanics and Rock Engineering - Proceedings of the 2nd GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2018 – The Official International Congress of the Soil-Structure Interaction Group in Egypt SSIGE
EditorsLaureano R. Hoyos, John S. McCartney
Number of pages11
ISBN (Print)9783030019341
Publication statusPublished - 2019
EventGeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures 2018 - Cairo, Egypt
Duration: 24 Nov 201828 Nov 2018
Conference number: 2nd
https://link.springer.com/book/10.1007/978-3-030-01935-8 (Proceedings)

Publication series

NameSustainable Civil Infrastructures
ISSN (Print)2366-3405
ISSN (Electronic)2366-3413


ConferenceGeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures 2018
Abbreviated titleGeoMEast 2018
Internet address


  • Kaolin Samples
  • Palm Oil
  • Pressure Plate Extractor
  • Soil Suction
  • Water Retention Behaviour

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