한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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지반 및 도로 공동부의 긴급복구용 CLSM 재료로 매립 석탄저회 활용 가능성

Possibility of Using Landfill Coal Ash as CLSM Material for Emergency Restoration of Ground and Road Joint Parts

  • 김진만 (공주대학교 건축공학과) ;
  • 신상철 (공주대학교 친환경콘크리트연구소) ;
  • 민경남 (세종이엔씨 기술연구소) ;
  • 김하석 ((주)도담이엔씨 기술연구소)
  • Jin-Man Kim (Department of Architectural Engineering, Kongju National University) ;
  • Sang-Chul Shin (Eco Friendly Concrete Research Center, Kongju National University) ;
  • Kyoung-Nam Min (Institute of Technology, Sejong E&C Ltd) ;
  • Ha-Seog Kim (Institute of Technology, Dodam E&C Ltd)
  • 투고 : 2023.01.17
  • 심사 : 2023.02.06
  • 발행 : 2023.03.30
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초록

본 연구에서는 매립 석탄저회를 활용한 긴급복구용 CLSM 채움재의 실용화 기술개발의 일환으로서 매립 석탄저회의 입도분포 및 미립분 함량 등의 물성을 파악한 결과 저회와 비회, 일반 흙이 섞여 있는 상태로 밀도 2.03, 잔입자 통과율 7.8 %인 입도분포 불량한 모래(SP)군인 것으로 나타났다. 유동화제 및 감수제와 같은 화학 혼화제를 사용하지 않고 단위수량으로 유동성을 확보하는 CLSM 재료는 Bleeding에 의한 재료분리 위험성이 크며 본 실험결과 석탄저회 사용량이 많고 배합수 추가가 많은 실험체의 경우 Bleeding ratio이 기준을 만족하지 않는 것으로 나타났다. 압축강도 시험결과 4시간 0.5 MPa 이상 강도발현은 반수석고를 단위결합재량 200 이상으로 사용한 시험체의 경우 만족하는 것으로 나타났으며 나머지 석고는 강도발현이 저조한 결과를 나타냈다. 매립 석탄저회를 CLSM 재료로 사용이 가능한 것으로 판단되나 발전사별 회처리장에 매립되어 있는 석탄저회의 물리, 화학적 특성을 파악하여 적용하는 것이 필요하다.

This study aims to develop CLSM fill material for emergency restoration using landfill coal ash. As a result of examining physical properties such as particle size distribution and fines content of landfill coal ash, bottom ash, fly ash, and general soil were mixed, and SP was found to have a density of 2.03 and a residual particle pass rate of 7.8 %. CLSM materials that secure fluidity in unit quantities without using chemical admixtures such as glidants and water reducing agents have a high risk of material separation due to bleeding. As a result of this experiment, it was found that the bleeding ratio did not satisfy the standard in the case of the specimen with a large amount of fly ash and a lot of addition of mixing water. As a result of the compressive strength test, the strength development of 0.5 MPa or more for 4 hours was found to be satisfactory for the specimens using hemihydrate gypsum with a unit binder amount of 200 or more, and the remaining gypsum showed poor strength development. Although it is judged that landfill coal ash can be used as a CLSM material, it is necessary to identify and apply the physical and chemical characteristics of coal ash buried in the ash treatment plant of each power generation company.

키워드

과제정보

본 연구는 한국동서발전(주) 매립석탄재 기반 긴급복구용 반응성 Self-Leveling 채움재 사업화 기술개발과 2022년도 중소벤처기업부의 기술개발사업[S3226444] 지원하에 수행한 연구로 관계기관에 감사의 말씀을 올립니다.

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