Journal of the Architectural Institute of Korea Structure & Construction (대한건축학회논문집:구조계)

Architectural Institute of Korea (대한건축학회)
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Influence of Various Treating Methods for Desulfurized Gypsum on the Engineering Properties of High Volume Blast Furnace Slag Cement Mortar

탈황석고의 처리방법변화가 고로슬래그 미분말 다량 치환 모르타르의 공학적 특성에 미치는 영향

  • Received : 2016.04.25
  • Accepted : 2017.01.13
  • Published : 2017.02.28
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Abstract

In this research, the influence of desulfurized gypsum (FGD) with different carbon removing methods of 0.3 mm sieving, and $500^{\circ}C$ high temperature combustion on high volume blast furnace slag cement mortar was evaluated with different replacement ratios of 1 : 2, and 1 : 4 for blast furnace slag. As an experiment result, flow was generally decreased with FGD replacing while slight increased was shown with 5 to 10 % of replacement for 1 : 4 mortar. As FGD replacement, air content was reduced setting time was shortened. Compressive strength was generally decreased with 1 : 2 mortar mixtures, but for 1 : 4 mortar mixture, the highest compressive strength value was obtained when FGD was replaced about 10 % due to the generation of ettringite. Drying shrinkage was decreased and absorption rate was increased with increased FGD replacement ratio. Overall, as a carbon removing method of FGD, 0.3 mm sieving showed better results than $500^{\circ}C$ high temperature combustion, and the mortar mixture was the most appropriate results were obtained with 1 : 4 mixture and 10 % of FGD replacement ratio.

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References

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