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2026 Vol.42, Issue 4 Preview Page
Electrical Resistivity Characteristics of Permeable Blocks According to Temperature and Pore Fluid Resistivity

온도 및 공극수 전기비저항 변화에 따른 투수블록의 전기비저항 특성

Tae-Hyun Kong1
,
Tin Aung Cho2
,
Tae-Min Oh3*
공 태현1
,
띤 아웅초2
,
오 태민3*
1Member, Ph.D. Student, Dept. of Civil and Environmental Engineering, Pusan National Univ.
2Graduate Student, Dept. of Civil and Environmental Engineering, Pusan National Univ.
3Member, Associate Prof., Dept. of Civil and Environmental Engineering, Pusan National Univ.
1정회원, 부산대학교 사회환경시스템공학과 박사과정
2비회원, 부산대학교 사회환경시스템공학과 석사과정
3정회원, 부산대학교 사회환경시스템공학과 부교수
*Corresponding Author
31 August 2026. pp. 223-232
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Abstract

Permeable blocks in urban pavement systems reduce surface runoff and promote rainfall infiltration. However, long-term pore clogging decreases their permeability. Electrical resistivity measurements provide a nondestructive means of evaluating permeability degradation. However, the measured electrical resistivity is affected not only by the permeability of permeable blocks but also by temperature and pore fluid resistivity. Therefore, calibration for these effects is required for field applications of electrical-resistivity-based permeable block monitoring. This study analyzed the effects of temperature and pore fluid resistivity on the electrical resistivity of permeable blocks. Permeable block specimens with embedded electrodes were prepared, and electrical resistivity was measured under different temperature and pore fluid resistivity conditions. The results showed that the electrical resistivity of the permeable block decreased nonlinearly with increasing temperature, decreasing by ~77% as the temperature increased from 10°C to 60°C. As the pore fluid resistivity increased, the electrical resistivity also increased, but the rate of increase gradually decreased under high-resistivity pore fluid conditions. In contrast, the normalized resistivity decreased nonlinearly. Using these results, temperature and pore fluid calibration factors were derived, and the applicability of the proposed calibration model was evaluated. The normalized resistivity under field conditions before calibration was ~79.3% lower than that under the reference condition. After calibration, the difference decreased to ~9.5%. These results provide baseline data for temperature and pore fluid resistivity calibration in electrical-resistivity-based permeable block monitoring.

Keywords
Electrical resistivity
Monitoring
Permeable block
Pore fluid resistivity
Temperature

투수블록은 도시 포장 시스템에서 지표 유출을 저감하고 강우 침투를 향상시키기 위해 활용되고 있다. 투수블록은 장기간 사용 시 내부 공극의 폐색으로 인해 투수성능이 저하되며, 이러한 투수성능 저하의 비파괴 평가기법으로 전기비저항 측정법이 활용된다. 그러나 전기비저항은 투수블록의 투수성능뿐만 아니라 온도 및 공극수 전기비저항의 영향을 함께 받는다. 따라서 전기비저항 기반 투수블록 모니터링의 현장 적용을 위해서는 온도 및 공극수 전기비저항에 대한 보정이 필요하다. 본 연구에서는 전극이 매립된 투수블록 시편을 제작하고, 온도 및 공극수 전기비저항 조건을 변화시키며 전기비저항을 측정하였다. 실험 결과, 온도가 증가함에 따라 투수블록의 전기비저항은 비선형적으로 감소하였다. 온도가 10℃에서 60℃로 증가함에 따라 전기비저항은 약 77% 감소하였다. 공극수 전기비저항 변화 실험에서는 공극수 전기비저항이 증가함에 따라 전기비저항이 증가하였으나, 고비저항 공극수 조건에서는 증가율이 점차 둔화되는 경향을 보였다. 또한 공극수 전기비저항이 증가함에 따라 정규화 전기비저항은 비선형적으로 감소하였다. 이를 바탕으로 온도보정계수와 공극수보정계수를 산정하였으며, 제안된 보정모델의 적용성을 검토하였다. 보정 전 현장조건의 정규화 전기비저항은 기준조건보다 약 79.3% 낮게 나타났으나, 보정 후에는 그 차이가 약 9.5%로 감소하였다. 본 연구결과는 전기비저항 기반 투수블록 모니터링에서 온도 및 공극수 전기비저항 영향을 보정하기 위한 기초자료로 활용될 것으로 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 : 42
  • No :4
  • Pages :223-232
  • Received Date : 2026-07-27
  • Revised Date : 2026-08-19
  • Accepted Date : 2026-08-20
  • DOI :https://doi.org/10.7843/kgs.2026.42.4.223
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