Journal of the Korea Institute of Building Construction (한국건축시공학회지)

The Korean Institute of Building Construction (한국건축시공학회)
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Effect of Blast Furnace Slag on Rheological Properties of Fresh Mortar

고로슬래그미분말의 치환율 변화에 따른 굳지않은 모르타르의 레올로지 특성 검토

  • Lim, Ji-Hee (Department of Architectural Engineering, Korea National University of Transportation) ;
  • Lee, Gun-Cheol (Department of Architectural Engineering, Korea National University of Transportation)
  • Received : 2014.06.05
  • Accepted : 2014.06.26
  • Published : 2014.08.20
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Abstract

Partial replacement of cement with blast furnace slag has many advantages such as the reduction of construction fee, the decrease of hydration heat and the increase of long-term strength. Hence, slag is widely used in practice. This study investigates the effect of slag on the rheological properties of cement paste and mortar. Three different types of slag (BS1, BS2 and BS3) with five different contents (0, 20, 40, 60 and 80 wt.%) were used to replace the cement. Each type of slag has different fineness. Water to binder ratio was 0.5. Test results showed that the partial replacement of BS1 and BS2 decreased flow and increased O-lot flow time, whereas that of BS3 caused an opposite effect, i.e., increased flow and decreased O-lot flow time. It was found that there was a good corelation between the values of yield stress and flow.

본 연구에서는 고로슬래그미분말의 분말도 종류 및 치환율이 시멘트 페이스트 및 모르타르에 미치는 영향에 대하여 검토하였다. 그 결과는 다음과 같다. 전반적으로 BS1 및 BS2의 경우 치환율이 증가함에 따라 항복치도 증가하는 경향을 보였다. 반면, BS 3의 경우 치환율이 증가함에 따라 전단응력이 감소하며 항복치도 감소하는 경향을 나타 내었다. 위 실험 결과를 참조하여 고로슬래그미분말을 사용한 현장배합 설계 시 유동성 파악의 기초적 자료로 참고할 수 있을 것으로 판단된다.

Keywords

References

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Cited by

  1. Rheological Evaluation of Blast Furnace Slag Cement Paster over Setting Time vol.16, pp.6, 2016, https://doi.org/10.5345/JKIBC.2016.16.6.505