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Analysis on the Causes of the Oil Leakage Phenomenon for Complex Waterproofing Methods of Asphalt Mastic and Modified Asphalt Sheet

콘크리트 구조물에 사용되는 개량아스팔트 시트와 아스팔트 매스틱을 복합화한 방수공법의 누유현상 원인 분석

  • Park, Jin-Sang (Program of Architecture of Convergence Institute of Biomedical Engineering and Bio-materials of Graduate School, Seoul National University of Science and Technology) ;
  • Kim, Dong-Bum (Program of Architecture of Convergence Institute of Biomedical Engineering and Bio-materials of Graduate School, Seoul National University of Science and Technology) ;
  • Park, Wan-Goo (Department of Architectural Engineering, Seoul National University of Science and Technology) ;
  • Oh, Sang-Keun (Department of Architectural Engineering, Seoul National University of Science and Technology)
  • Received : 2018.04.06
  • Accepted : 2018.07.19
  • Published : 2018.08.20

Abstract

In this study, observations of oil leakage samples taken from the actual site were performed to identify the causes of the oil leakage phenomenon. As a result, the separation of the material components was determined as the main cause of the oil leakage phenomenon based on the changes in the surface conditions, and verification of this was conducted. The evaluation results confirmed that the filler component of the asphalt mastic subsided with the lapse of the settling time, and that the difference ratio of the filler contents of the upper and lower specimens was up to 23.8% after day 28. Based on these results, a hypothesis on the oil leakage mechanism of asphalt mastic was established, and then modeling of the entire process of oil leakage was performed.

본 연구에서는 누유 현상에 대한 원인 파악을 위하여 실제 현장에서 누유된 시료를 채취하여 육안 관찰을 실시한 결과, 표면 상태의 변화를 근거로 누유 현상 원인이 "구성 성분간 분리"로 판단하고, 이에 대한 검증을 실시하였다. 검증을 위하여 현장에서 많이 사용되고 있는 아스팔트 매스틱 도막재 3개 제품을 수직 실린더에 채워 $50{\pm}5^{\circ}C$의 챔버 속에 정치시킨 후, 1일부터 28일간 매일 실린더의 상부, 하부 재료를 대상으로 Filler 함량차를 측정하여, 변화율을 비교 분석하였다. 평가 결과, 정치 시일이 경과할수록 아스팔트 매스틱의 Filler 성분이 침강되는 분리현상을 확인할 수 있었으며, 정치 후 28일에는 상부와 하부 시료의 Filler 함량이 최대 23.8% 이상 차이가 나는 것을 확인할 수 있었다. 상기 결과를 근거로 아스팔트 매스틱의 누유 발생 메커니즘에 대한 가설 수립 후 누유발생 전 과정에 대한 예측 모델을 제시하였다.

Keywords

References

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