Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
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Effect of Hydrophobic Condition and Water Content on the Spectral Information of Soil Particle Surface

흙 입자 표면의 소수성 조건과 함수비가 분광정보에 미치는 영향

  • Jeong-Jun, Park (Incheon Disaster Prevention Research Center, Incheon National University) ;
  • Seung-Kyong, You (Dept. of Civil Engineering, Myongji College) ;
  • Kwang-Wu, Lee (Dept. of Geotechnical Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Jung-Mann, Yun (Dept. of Construction Information System, ShinAnsan University) ;
  • Gigwon, Hong (Dept. of Civil Engineering, Halla University)
  • Received : 2022.12.11
  • Accepted : 2022.12.20
  • Published : 2022.12.30
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Abstract

This study describes the evaluation results on the effect of soil particle surfaces coated with various hydrophobic conditions on spectral information according to water content. Wettability test and spectral information evaluation test were performed on the hydrophobic coated standard sand. When the standard sand was coated with 1%, 3%, and 5% hydrophobic, the contact angles of sand-water interface were 130°~143°, 129°~144°, and 131°~144°, respectively. This means that the contact angle increased as the degree of hydrophobic coating increased at the same drying time, but the range of the contact angle had the same wettability. This means that the contact angle increases as the hydrophobic coating degree increases at the same drying time, whereas the contact angle range has the same wettability. As a result of spectral information evaluation, the maximum spectral reflectance of the dried sand with hydrophobic condition decreased compared to that of the hydrophilic sand, as the degree of hydrophobic increased. However, the maximum spectral reflectance was increased by increasing the degree of hydrophobic under the same water content conditions.

본 연구에서는 다양한 소수성 조건으로 코팅된 흙 입자 표면이 함수비 조건에 따라 분광정보에 미치는 영향을 평가하였다. 이를 위해 소수성으로 코팅된 표준사의 습윤성 실험 및 분광정보 평가 실험을 수행하였다. 습윤성 평가 결과, 1%, 3% 및 5%로 소수성 코팅된 표준사의 건조시간에 따른 표준사-물 경계면의 접촉각은 각각 약 130°~143°, 약 129°~144°와 약 131°~144°의 범위를 보였다. 이는 동일한 건조시간에서 소수성 코팅 정도가 증가할수록 접촉각은 증가하였지만, 접촉각의 범위는 동일한 범주의 습윤성을 갖는 것을 의미한다. 분광정보 평가 결과, 소수성 상태를 갖는 건조된 표준사는 친수성 상태의 표준사에 비하여 소수성 수준의 증가에 따라 최대분광반사율이 감소한 반면에, 동일한 함수비 조건에서는 소수성 정도가 증가할수록 최대분광반사율이 증가하는 것으로 평가되었다.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT). (NRF-2022R1F1A1074256)

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