Infiltration characteristics of chemically-treated water-repellent kaolin

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

Research output: Contribution to journalConference article

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
Pages (from-to)730-735
Number of pages6
JournalGeotechnical Special Publication
Issue numberGSP 280
DOIs
Publication statusPublished - 2017 Jan 1
EventGeotechnical Frontiers 2017 - Orlando, United States
Duration: 2017 Mar 122017 Mar 15

Fingerprint

Kaolin
kaolin
Infiltration
infiltration
Water
water
hydrostatic pressure
Hydrostatic pressure
Clay
clay
Soils
wetting
low pressure
Contact angle
Wetting
soil water
hydraulics
Hydraulics

All Science Journal Classification (ASJC) codes

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

Cite this

Choi, Youngmin ; Lim, Sanghyeong ; Yun, Tae Sup ; Lee, Woojin ; Lee, Changho. / Infiltration characteristics of chemically-treated water-repellent kaolin. In: Geotechnical Special Publication. 2017 ; No. GSP 280. pp. 730-735.
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Infiltration characteristics of chemically-treated water-repellent kaolin. / Choi, Youngmin; Lim, Sanghyeong; Yun, Tae Sup; Lee, Woojin; Lee, Changho.

In: Geotechnical Special Publication, No. GSP 280, 01.01.2017, p. 730-735.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Infiltration characteristics of chemically-treated water-repellent kaolin

AU - Choi, Youngmin

AU - Lim, Sanghyeong

AU - Yun, Tae Sup

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AU - Lee, Changho

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AB - 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.

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