Infiltration characteristics of chemically-treated water-repellent kaolin

Youngmin Choi, Sanghyeong Lim, Tae Sup Yun, Woojin Lee, Changho Lee

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

Abstract

Degree of water repellency significantly influences the infiltration behavior of water-repellent soils. In this study, the chemically treated water-repellent kaolin clays with different concentrations (CO) of an organosilane solution are examined to explore the effect of water repellency on its infiltration characteristics. Experimental results show that the soil-water contact angle tends to increase with increasing CO until CO = 5%, and then shows an almost constant value with increasing CO. The water infiltration time (WIT) results show that water infiltration resistance is significantly improved by organosilane treatment (CO ≥ 5%) under low hydrostatic pressure (WP). However, as the hydrostatic pressure increases, WIT is converged (CO = 5%) or exacerbated (CO = 10% and 20%) to the WIT of untreated clay. The different behaviors of infiltration are discussed in terms of wetting patterns. The findings can be used to improve a conventional hydraulic barrier system.

Original languageEnglish
Title of host publicationGeotechnical Special Publication
EditorsThomas L. Brandon, Richard J. Valentine
PublisherAmerican Society of Civil Engineers (ASCE)
Pages730-735
Number of pages6
EditionGSP 280
ISBN (Electronic)9780784480434
DOIs
Publication statusPublished - 2017
EventGeotechnical Frontiers 2017 - Orlando, United States
Duration: 2017 Mar 122017 Mar 15

Publication series

NameGeotechnical Special Publication
NumberGSP 280
Volume0
ISSN (Print)0895-0563

Conference

ConferenceGeotechnical Frontiers 2017
CountryUnited States
CityOrlando
Period17/3/1217/3/15

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Architecture
  • Building and Construction
  • Geotechnical Engineering and Engineering Geology

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