Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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A Study on the Field Application of Alkaline Tunnel Wastewater to Neutralization Using CO2

터널시공 시 이산화탄소(CO2)를 이용한 알칼리성 폐수의 중화처리 현장적용 연구

  • Received : 2020.05.11
  • Accepted : 2020.06.15
  • Published : 2020.08.31
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Abstract

Strong alkaline waste water is generated in large quantities due to using Concrete, shotcrete and various compounds in tunnel construction sites. As the release of this alkaline waste water will contaminate the stream water, it has to be neutralized. Currently, this waste water is mainly neutralized by using sulfuric acid or hydrochloric acid, but the risks of corrosion and handling of facilities are inherent and the chemical control act requires strict management measures. Therefore, using CO2 (carbon dioxide) as an alternative has been highlighted and various indoor experiment studies have been conducted to prove its potential. However, it is difficult to apply CO2 to the site because it is still completely lacking in field application research and shows different characteristics from indoor experiments. In this study, the actual site applicability is verified through field testing.

터널시공 현장에서는 콘크리트와 숏크리트 및 각종 그라우팅 공법의 사용으로 다량의 알칼리성 폐수가 발생되고 있으며 하천오염을 방지하기 위해 중성화 처리를 해서 방류해야 한다. 현재는 이를 황산과 같은 강산으로 중화 처리하고 있으나 취급상의 위험이 내재 되어있다. 그 대안으로 이산화탄소(CO2) 사용이 부각되었고 다양한 실내실험 연구가 진행되어 그 가능성이 입증되고 있다. 하지만 아직 CO2의 현장 적용연구가 절대 부족하고 특히 건설현장에서는 실내 실험 결과와는 다른 특성을 보이고 있기 때문에 현장 적용이 어려운 실정이다. 이에 본 연구에서는 현장 실험을 통하여 실제 현장 적용 가능성을 검증하고자 한다.

Keywords

References

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