Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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A Study on Strength and Durability of Vibrated and Rolled Method Mortar Mixed with Desulfurized Gypsum and Ferronickel Slag Fine Powder

탈황석고와 페로니켈슬래그 미분말을 혼합한 진동전압방식 모르타르의 강도 및 내구성에 관한 연구

  • 유정환 (상명대학교 건설시스템공학과) ;
  • 박상순 (상명대학교 건설시스템공학과)
  • Received : 2021.10.28
  • Accepted : 2021.12.09
  • Published : 2021.12.30
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Abstract

In this study, strength and durability evaluations are performed on vibrated-rolled method mortar mixtures containing desulfurized gypsum and ferronickel slag powder. Desulfurized gypsum and ferronickel slag fine powders were substituted for 25% limestone fine powders u sed in the manu factu re of VR tu bes, and mortar specimens were prepared u sing vibrated-rolled method. Accordingly, flexural and compressive strengths were performed to evaluate the strength, and chlorine ion penetration resistance and sulfuric acid resistance tests were performed to evaluate durability. Flexural and compressive strength were improved in the range 20 to 60% of desu lfu rized gypsu m among admixtu res, and the amou nt of passing charge decreased in the choride ion penetration resistance test in the range of 20 to 80% of desulfurized gypsum. As for the resistance to su lfu ric acid, when the proportion of desu lfu rized in the admixtu re was 40%, the strength and weight change rate according to the immersion period was reduced. Appropriate use of desulfurized gypsum and ferronickel slag powder is expected to improve performance in terms of strength and durability.

본 연구에서는 산업부산물인 탈황석고 및 페로니켈슬래그 미분말을 혼합한 진동전압방식 모르타르의 강도 및 내구성의 평가를 실시한다. VR관 제작시 사용되는 석회석미분말 25% 치환을 기준으로 탈황석고 및 페로니켈슬래그 미분말을 복합치환하고, 진동전압방식을 사용하여 시편을 제작하였다. 강도발현 특성을 평가하기 위해 휨 및 압축강도를 실시하였으며, 내구성을 평가하기 위해 염소이온침투저항성 및 내황산저항성 시험을 실시하였다. 휨 및 압축강도에서 혼화재 중 탈황석고의 비율이 20~60% 범위에서 강도가 향상되었으며, 탈황석고의 비율이 20~80% 범위에서 염소이온침투저항성 시험에서 통과 전하량이 감소하는 경향을 보였다. 내황산저항성은 탈황석고의 비율이 40%인 경우 침지기간에 따른 강도 및 질량 감소율이 줄어들었다. 강도 및 내구성 실험결과를 기초로 탈황석고 및 페로니켈슬래그 미분말을 적절하게 혼합해서 사용한다면 강도 및 내구성에서 성능 개선 효과를 기대할 수 있다고 판단된다.

Keywords

Acknowledgement

본 연구는 상명대학교의 교내연구비 지원에 의해 수행되었습니다.

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