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Article: Grain surface analysis of a hydrophobized sand: Thickness estimation of the soft coating layer

TitleGrain surface analysis of a hydrophobized sand: Thickness estimation of the soft coating layer
Authors
KeywordsSoft coating layer Coating thickness
Rough surface
Soil grain
Power spectral density
Issue Date2021
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/powtec
Citation
Powder Technology, 2021, v. 377, p. 827-831 How to Cite?
AbstractSoil grains when treated with dimethyldichlorosilane (DMDCS) create a thin soft coating layer. The presence of such a layer changes the grain surface wettability giving desirable hydraulic properties which has great potential in engineering practice. The thickness of such a layer has been identified to be an influencing parameter for the mechanical properties. But its estimation is not straightforward as the soil grain contains a relatively rough surface which is non-negligible compared to the thin soft coating. In this paper, we proposed a method that is based on the surface topography to estimate the soft coating thickness. A high-resolution microscope equipped with a white light interferometer was employed to examine the soil grain surface. It was found that the coating thickness is largely dependent on the surface topography of soil grains. The present method, applicable for particles with a very thin coating layer that is comparable to the surface roughness, such as for natural sands, could be used to further study the effect of coatings, of synthetic or natural origin, on the hydro-mechanical behaviour of coated soil samples.
Persistent Identifierhttp://hdl.handle.net/10722/290873
ISSN
2020 Impact Factor: 5.134
2020 SCImago Journal Rankings: 1.079
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYang, HW-
dc.contributor.authorNunes Lourenco, SD-
dc.contributor.authorXING, X-
dc.date.accessioned2020-11-02T05:48:19Z-
dc.date.available2020-11-02T05:48:19Z-
dc.date.issued2021-
dc.identifier.citationPowder Technology, 2021, v. 377, p. 827-831-
dc.identifier.issn0032-5910-
dc.identifier.urihttp://hdl.handle.net/10722/290873-
dc.description.abstractSoil grains when treated with dimethyldichlorosilane (DMDCS) create a thin soft coating layer. The presence of such a layer changes the grain surface wettability giving desirable hydraulic properties which has great potential in engineering practice. The thickness of such a layer has been identified to be an influencing parameter for the mechanical properties. But its estimation is not straightforward as the soil grain contains a relatively rough surface which is non-negligible compared to the thin soft coating. In this paper, we proposed a method that is based on the surface topography to estimate the soft coating thickness. A high-resolution microscope equipped with a white light interferometer was employed to examine the soil grain surface. It was found that the coating thickness is largely dependent on the surface topography of soil grains. The present method, applicable for particles with a very thin coating layer that is comparable to the surface roughness, such as for natural sands, could be used to further study the effect of coatings, of synthetic or natural origin, on the hydro-mechanical behaviour of coated soil samples.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/powtec-
dc.relation.ispartofPowder Technology-
dc.subjectSoft coating layer Coating thickness-
dc.subjectRough surface-
dc.subjectSoil grain-
dc.subjectPower spectral density-
dc.titleGrain surface analysis of a hydrophobized sand: Thickness estimation of the soft coating layer-
dc.typeArticle-
dc.identifier.emailNunes Lourenco, SD: lourenco@hku.hk-
dc.identifier.authorityNunes Lourenco, SD=rp01872-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.powtec.2020.09.062-
dc.identifier.scopuseid_2-s2.0-85091896898-
dc.identifier.hkuros318123-
dc.identifier.volume377-
dc.identifier.spage827-
dc.identifier.epage831-
dc.identifier.isiWOS:000598623000005-
dc.publisher.placeNetherlands-
dc.identifier.issnl0032-5910-

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