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이수석고가 고로슬래그 미분말 베이스 무시멘트 모르타르의 기초물성에 미치는 영향

Effect of Calcium Sulfate Dihydrate (Gypsum) on the Fundamental Properties of Slag-based Mortar

  • Baek, Byung Hoon (Department of Architectural Engineering, Semyung University) ;
  • Han, Cheon Goo (Department of Architectural Engineering, Cheong ju University)
  • 투고 : 2014.03.04
  • 심사 : 2014.04.16
  • 발행 : 2014.06.20

초록

최근에 저탄소녹색성장 및 OPC 절감의 요구에 따라 BS와 같은 산업 부산물을 많이 사용하고 재건축의 증가 및 건설폐기물 발생량이 많아지면서 RA 사용 확대하게 되며, RA 및 무 시멘트 결합재 관심 증대 되고 있다. 무 시멘트 결합재와 RA의 활용을 모두 만족시키기 위하여, RA와 철강 산업 부산물인 BS을 혼합함으로써, 100% 순환자원만을 활용하여 무 시멘트 상태에서 강도발현성을 확인한 바 있다.이에 본 연구는 OPC를 사용하지 않고, BS과 RA 및 CS를 사용하여 모르타르를 제조함으로써 기존 강알칼리를 투입하여 제조하는 지오폴리머 모르타르(Geopolymermortar)와 또 다른 관점에서 접근하였다. 결과적으로, RFA의 유동성 저하 및 초기강도 저하문제만 해결 될 수 있다면, BS에 CS를 15% 치환하고 RFA골재를 사용하는 무 시멘트 모르타르가 OPC 100%를 사용한 종래의 시멘트 모르타르 만큼의 품질을 발휘할 수 있을 것으로 사료된다.

With the vision of 'a low carbon green develop' various industrial by-products were used as replacement of cement, in order to reduce $CO_2$ emissions from the manufacturing process of cement. Blast furnace slag is one of the industrial by-products. Due to the similar chemical compositions to ordinary Portland cement, blast furnace slag have been widely used in concrete with minimum side effects. Hence, in recent years, alkali activated slag-based composites are extensively studied by many researchers. However, the alkali activator can cause a number of problems in practice. Therefore, in this study, an alternative way of activating the slag was investigated. To activate the slag without using an alkali activator, calcium sulfate dihydrate was chosen and mixed with natural recycled fine aggregate. Fundamental properties of the slag-based mortar were tested to evaluate the effect of calcium sulfate dihydrate.

키워드

참고문헌

  1. Kim DG, Development of zero-cement brick using blast furnace slag powder, recycled fine aggregates and functional fine particle [Dissertation]. [Choonju (Korea)]: Cheongju university; 2012. 200p.
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  4. Son SH, Development of Zero-Cement Mortar Using Reactivity of Recycled Fine Aggregates and Mineral Admixtures [Dissertation]. [Choonju (Korea)]: Cheongju university; 2012. 159p.
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피인용 문헌

  1. Effects of Incineration Waste Ash and Gypsum Substitution on the Properties of Blast Furnace Slag Mortar using Recycled Aggregate vol.15, pp.2, 2015, https://doi.org/10.5345/JKIBC.2015.15.2.161
  2. Quality of High Volume Blast Furnace Slag Mortar Depending on Desulfurization Gypsum Treating Methods and Fine Aggregate Type vol.4, pp.2, 2016, https://doi.org/10.14190/JRCR.2016.4.2.157