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Properties of Cement Mortar as Particle Size and Hydrothermal Synthesis Temperature Using Scheelite Tailing

중석 광미를 사용한 시멘트 모르타르의 입도 및 수열합성온도별 물리적 특성

  • Chu, Yong Sik (Energy & Environmental Division, Korea Institute of Ceracic Eng. & Tech.) ;
  • Seo, Seong Gwan (Energy & Environmental Division, Korea Institute of Ceracic Eng. & Tech.) ;
  • Choi, Sung Bum (Department of Mineral Materials Business, YEMI) ;
  • Kim, Gyoung man (Department of Mineral Materials Business, YEMI) ;
  • Hong, Seok Hwan (Department of Mineral Materials Business, YEMI)
  • 추용식 (한국세라믹기술원 에너지환경본부) ;
  • 서성관 (한국세라믹기술원 에너지환경본부) ;
  • 최성범 (영월산업진흥원 광물소재사업팀) ;
  • 김경만 (영월산업진흥원 광물소재사업팀) ;
  • 홍석환 (영월산업진흥원 광물소재사업팀)
  • Received : 2019.10.04
  • Accepted : 2019.12.05
  • Published : 2019.12.31

Abstract

Cement mortar was hydrothermal-synthesized with particle size of tailings using scheelite tailings deposited without proper treatment, and its physical properties were investigated. The mixing ratios of water-cement and sand-cement were fixed at 75 % and 400 %, respectively, during preparing cemnt mortar, and the sand was replaced by the tailings at 0 ~ 50 %. The particle size of tailings was controlled at 9.3 ~ 53.0 ℃, and the hydrothermal temperature was kept at 60 ~ 180 ℃ for 6 hours after the temperature increased to pretermined temperature with 2 ℃ heating rate. The compressive strength increased with increasing hydrothermal temperature. The compressive strengths were 55.2 MPa and 54.5 MPa when the mortars were prepared with 30 % low arsenic and high arsenic tailings after 60 min grinding. The compresiive strenght was enhanced 300 % compared with reference sample.

본 연구에서는 국내에 적절한 환경처리 없이 방치되어 있는 중석광미를 활용하여, 중석 광미 입도별 시멘트 모르타르 제조 후 수열합성온도별 물리적 특성을 확인하였다. 시멘트 모르타르 혼합 시 물-시멘트비는 75 %로, 모래-시멘트비는 400 %로 고정하였으며, 광미는 모래(모래 중량 대비 0 ~ 50 % )를 치환하여 사용하였다. 저비소 및 고비소 광미의 입경은 9.3 ~ 53.0 ㎛로 제어하였고 수열합성온도는 승온 속도 2 ℃로 고정하여 60 ~ 180 ℃에서 6시간 동안 유지하였다. 수열합성 온도가 증가에 따라 압축강도는 상승하였으며, 60분 분쇄 저비소 및 고비소 광미를 30 % 혼합 시 압축강도는 각각 55.2 MPa 및 54.5 MPa로, 비교시편 보다 300 % 이상 향상되는 결과를 도출하였다.

Keywords

References

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