한국지반환경공학회 논문집 (Journal of the Korean GEO-environmental Society)

한국지반환경공학회 (Korean Geo-Environmental Society)
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다공성 실리카를 혼합한 경화토의 건습반복 강도특성

Characteristics of Cyclic Drying-Wetting on Strength of Solidified Soil Mixed Porosity Silica

  • Kim, Donggeun (Department of Forest Resources and Enviroment, Kyungpook National University) ;
  • Bang, Seongtaek (Eco-Friendly Technology Research Center, Kyungpook National University) ;
  • Oh, Sewook (Department of Cons. and Disaster Prevention Engineering, Kyungpook National University)
  • 투고 : 2014.06.23
  • 심사 : 2014.08.24
  • 발행 : 2014.10.01
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초록

본 연구에서는 다공성 실리카를 사용하여 시멘트계 고화재의 유해성을 개선한 경화토의 기후변화에 대한 강도특성을 규명하기 위하여 습윤건조 반복시험을 수행하여 경화토가 기후영향을 받기 전과 후의 강도특성을 규명하고자 한다. 본 연구에 사용된 경화토는 주위에서 쉽게 구할 수 있는 화강풍화토 및 우드칩을 사용하였으며, 일축압축시험을 위한 공시체는 지름 50 mm, 높이 100 mm의 크기로 혼합토 중량대비 실리카의 혼합비율을 5 %, 10 %, 15 %로 변화시키고 각 단계별로 우드칩을 0.5 %, 1.0 %, 1.5 % 혼합하여 제작하고 7, 14, 28일 동안 상온으로 양생시킨 후 습윤건조 반복과정을 0, 3, 6, 12 cycle을 반복하여 역학적인 특성을 평가하였다. 또한 습윤건조 전후의 상대동탄성계수 변화를 평가하기 위하여 각 사이클이 종료되면 동탄성시험을 수행하였다.

In order to examine strength properties depended on climate changes of solidified soil amended by porosity silica which enhance harms of cement, this study conducts a wetting and drying repetition test and then, attempts to verify strength properties before and after solidified soil gets environmental influence. Test pieces for the unconfined compression test changed the mixing ratio of solidified soil compared to mixed soil weigh to 5 %, 10 % and 15 %. For each step, it was created by mixing 0.5 %, 1.0 % and 1.5 % of wood chips, and curing period for 7, 14, and 28 days. Then, the wetting and drying repetition process was repeated 0, 3, 6, and 12 cycles to analyze mechanical properties. To also evaluate changes of relative dynamic elastic modulus before and after the wetting and drying, dynamic elastic modulus tests were conducted when each cycle was completed.

키워드

참고문헌

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피인용 문헌

  1. An Experimental Study on Cement-Solidified Cd-Contaminated Soils under Drying-Wetting Cycles vol.46, pp.2, 2018, https://doi.org/10.1520/JTE20160613