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2024 Vol.40, Issue 6 Preview Page
Dryness Assessment of Biopolymer-treated Sandy Soils Based on Relative Permittivity

비유전율 기반 바이오폴리머 처리 사질토의 건조도 평가

Eun Sang Lee1
,
Hyunmuk Cho1
,
Won-Taek Hong2*
이 은상1
,
조 현묵1
,
홍 원택2*
1Member, Graduate Student, Dept. of Civil & Environmental Engineering, Gachon Univ.
2Member, Assistant Prof., Dept. of Civil & Environmental Engineering, Gachon Univ.
1정회원, 가천대학교 토목환경공학과 석사과정
2정회원, 가천대학교 토목환경공학과 조교수
*Corresponding Author
31 December 2024. pp. 183-190
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Abstract

The interparticle bonding effect in Xanthan gum biopolymer-treated sandy soils is primarily influenced by the drying process of the Xanthan gum biopolymer solution injected into the voids. Therefore, monitoring the dryness of these treated soils is essential for assessing their engineering behavior. This study establishes a relationship between the dryness of Xanthan gum biopolymer-treated sandy soils and their relative permittivity, enabling dryness estimation based on electromagnetic properties. To measure relative permittivity, a TDR (time domain reflectometry) cell equipped with a 5-electrode TDR probe was developed. Oven-dried jumunjin sand was prepared within the TDR cell and saturated with a 0.75% weight concentration of Xanthan gum biopolymer solution. During the drying process, weight-based dryness and TDR waveforms were recorded, and relative permittivity was calculated from the round-trip travel time of guided electromagnetic waves. The experimental results indicate a strong correlation between the dryness of Xanthan gum biopolymer-treated sandy soils and a quadratic function of relative permittivity, with a determinant coefficient of 0.996. This finding demonstrates that relative permittivity is a key property for estimating the interparticle bonding effect in these biopolymer-treated soils. In addition, the results of this study have potential applications in geophysical surveying method for field monitoring of biopolymer-treated ground.

Keywords
Drying process
Interparticle bonding effect
Relative permittivity
Time domain reflectometry
Xanthan gum biopolymer

잔탄검 바이이폴리머 수용액을 주입한 사질토의 결합력 증대효과는 건조도에 지배적인 영향을 받으므로, 바이오폴리머 처리토의 공학적 거동 예측을 위하여 건조도 평가가 필수적으로 요구된다. 본 연구에서는 전자기적 물성 기반 건조도 평가를 위하여 잔탄검 바이오폴리머 처리토의 건조도와 비유전율의 상관관계를 수립하고자 하였다. 대상 시료의 비유전율 평가를 위하여 5전극 TDR probe가 설치된 TDR 셀을 제작하였으며, TDR 셀 내에 노건조된 주문진 표준사를 조성 및 중량농도 0.75%의 잔탄검 바이오폴리머 수용액을 주입하여 포화시켰다. 잔탄검 바이오폴리머 수용액 주입 시료의 건조과정 중 중량 기반 건조도 및 TDR 신호가 수집되었으며, 유도전자기파의 왕복전파시간을 바탕으로 비유전율이 평가되었다. 실험 결과, 잔탄검 바이오폴리머 처리 사질토의 건조도는 비유전율의 2차함수 형태로써 결정계수가 0.996에 해당하는 우수한 상관관계를 보였으며, 이는 비유전율이 잔탄검 바이오폴리머 처리토의 결합력 증대효과 예측을 위한 주요한 물성으로서 이용될 수 있음을 나타낸다. 또한, 본 연구의 결과는 향후 바이오폴리머 처리토의 현장 모니터링을 위한 지구물리탐사 기법의 참고 자료로서 활용될 수 있을 것이라 기대된다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 40
  • No :6
  • Pages :183-190
  • Received Date : 2024-12-23
  • Accepted Date : 2024-12-23
  • DOI :https://doi.org/10.7843/kgs.2024.40.6.183
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