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Properties of Ground Solidification Materials using Vietnam CFBC Fly Ash

베트남 CFBC 플라이애시를 사용한 지반고화재의 특성

  • Received : 2018.03.19
  • Accepted : 2018.04.17
  • Published : 2018.06.30

Abstract

According to Vietnam government establishes additional coal-fired power plants to secure generation capacity, emission of ashes is accelerating and processing them is urgent issue. This study targeted utilize fly ashes that occurred in circulating fluidized bed combusion (CFBC) power plant to use ground solidification materials. CFBC fly ashes are used to make solidification with ground granulated blast furnace slag (GGBFS), gypsum and cement. Then produced specimens by mixing with soft ground soil to confirm mixing effect of fly ash in solidification. As a result it was possible to find mixture design that is satisfied 3 MPa compressive strength in age 28 days and reduce weight loss rate over 50% in acid immersion test than plain specimens that using only ordinary portland cement.

베트남 정부는 석탄화력발전소 증설을 중심으로 한 발전용량확보 계획을 추진 중이며, 그에 따라 발전회의 발생량이 지속적으로 증가하고 있어 발전회 대량처리 방안 확보가 시급한 실정이다. 본 연구는 베트남에서 발생되는 발전회 중 순환유동층발전소 플라이애시를 지반고화재의 원료로 활용하기 위해 수행되었다. 플라이애시의 혼용이 지반고화재 성능에 미치는 영향을 확인하기 위해 대상 플라이애시와 고로슬래그, 석고, 시멘트 등을 사용하여 지반고화재를 제조하고, 이를 베트남 연약지반 토사와 혼합하여 시험체를 제작한 후 성능을 평가하였다. 그 결과, 28일 기준 강도 3 MPa 확보가 가능한 배합을 확인하였으며, 기존 보통 포틀랜드 시멘트만을 사용한 고화재 보다 내산성이 뛰어나 산 침지 시험에서 중량손실률을 절반이하로 감소시킬 수 있었다.

Keywords

References

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