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무수석고와 C12A7계 슬래그를 사용한 수축저감제 및 모르타르 특성

Properties of shrinkage reducing agent and mortar used Anhydrite and C12A7-based slag

  • 박수현 (한국세라믹기술원 에너지환경소재본부) ;
  • 추용식 (한국세라믹기술원 에너지환경소재본부) ;
  • 서성관 (한국세라믹기술원 에너지환경소재본부) ;
  • 박재완 (한국세라믹기술원 에너지환경소재본부)
  • Park, Soo-Hyun (Energy & Environmental Division Korea Institute of Ceramic Eng. & Tech.) ;
  • Chu, Yong-Sik (Energy & Environmental Division Korea Institute of Ceramic Eng. & Tech.) ;
  • Seo, Sung-Kwan (Energy & Environmental Division Korea Institute of Ceramic Eng. & Tech.) ;
  • Park, Jae-Wan (Energy & Environmental Division Korea Institute of Ceramic Eng. & Tech.)
  • 투고 : 2013.08.09
  • 심사 : 2013.09.09
  • 발행 : 2013.09.30

초록

본 연구에서는 CA계 슬래그와 무수석고를 사용하여 수축저감제를 제조하였으며, 모르타르의 압축강도와 건조수축 특성을 향상시키기 위해서 상기 수축저감제를 첨가하였다. 모르타르의 응결시간, 길이변화율 및 압축강도는 수축저감제의 배합비율에 따라 변화하였다. 슬래그가 0~7%까지 첨가된 모르타르는 슬래그 첨가량 증가에 따라 응결시간이 짧아졌으며, 7일까지의 길이변화율은 유사하였다. 7일 양생조건의 압축강도는 $C_{12}A_7$계 슬래그 첨가량 증가에 따라 증가되었다. $C_{12}A_7$계 슬래그가 6% 첨가된 모르타르의 28일 강도는 약 36 MPa이었으며, 35일에서의 건조수축율은 가장 낮은 값을 나타내었다. 그러므로 $C_{12}A_7$계 슬래그가 6% 첨가된 모르타르에서 우수한 물리적 특성을 발현하는 것으로 판단할 수 있었다.

In this study, shrinkage reducing agent was fabricated with $12CaO{\cdot}7Al_2O_3(C_{12}A_7)$ of CA-based slag and anhydrite. Mortars added shrinkage reducing agent were experimented for enhancement of shrinkage reduction and compressive strength. The properties of setting time, length change and compressive strength of mortar changed with mixing ratios. From 0% to 6% $C_{12}A_7$-based slag, setting times got shorter and length changes of mortars were similar to 7days. From 1day to 7days, the more mortar had $C_{12}A_7$-based slag, the higher compressive strength. At 28days, compressive strength of mortars with 6% $C_{12}A_7$-based slag was about 36MPa. After 35days, mortar with 6% $C_{12}A_7$-based slag had the lowest ratio of shrinkage reduction. So mortar with 6% $C_{12}A_7$-based slag had the excellent characteristics such as compressive strength and shrinkage reduction ratio.

키워드

참고문헌

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피인용 문헌

  1. A Study on Pretreated Paper Sludge Ash for Cement Admixture vol.25, pp.6, 2016, https://doi.org/10.7844/kirr.2016.25.6.58