Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
권호 표지
DOI QR코드

DOI QR Code

Effects of Waste Refractory Powder and Desulfurization Gypsum as Activator on the Properties of High Volume Blast Furnace Slag Mortar with Illite

자극제로서 폐내화물 및 탈황석고가 일라이트 및 고로슬래그 다량 치환 모르타르의 물성에 미치는 영향

  • Yun, Weon-Keun (Department of Architectural Engineering, Cheong-ju University) ;
  • Han, Min-Cheol (Department of Architectural Engineering, Cheong-ju University)
  • Received : 2017.06.07
  • Accepted : 2017.06.23
  • Published : 2017.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

The objective of this paper is to investigate the effect of waste refractory powder(WRP) and desulfurization gypsum(FGD) as activators on the flow properties and the strength development of high volume blast furnace slag mortar incorporating illite(BSM) having adsorption and deodorization. To fabricate the BSMs with 60% of W/B, blast furnace slag are incorporated with 45% and 65%, respectively. WRP and FGD are substituted from 5 to 10%. Test results indicate that the flow is decreased with increase of WRP and FGD, while increase of WRP and FGD enhance the compressive strength due to accelerated reaction of blast furnace slag, The use of illite results in a decrease of compressive strength. pH has increasing tendency until 7days, while it has reduction. In this paper, optimal dosages of WRP and FGD are believed to be around 5% each.

본 연구는 고로슬래그 기반 모르타르에 잠재수경성 반응을 유도하기 위해 자극제로써의 역할로 WRP 및 FGD를 활용하고, 이에 탈취 및 흡착성분을 지닌 천연재료인 일라이트를 활용하여 기능성을 부여한 모르타르 환경에서 결합재 치환율 변화에 따른 모르타르의 유동성 및 강도특성을 분석하고자 한다. 실험결과, 플로는 일라이트 및 결합재 치환율이 증가할수록 유동성은 감소하는 것으로 나타났다. 공기량은 OPC와 결합재를 치환하지 않은 BSC 45를 사용한 배합 보다 BSC 65를 사용한 배합에서 낮은 공기량을 나타내었으며, 일라이트를 1% 치환한 경우 WRP 분말 및 FGD의 공기량은 서로 유사한 값을 나타냈으며, 일라이트 0%보다 전체적인 배합은 낮은 공기량을 나타내었다. 휨강도 및 압축강도의 경우는 일라이트를 치환할 시 강도는 낮아졌으며, WRP 및 FGD 치환율이 증가할수록 잠재수경성 반응으로 인해 강도는 증가하는 경향을 나타내었다. pH는 전반적으로 재령 7일까지 증가하는 경향을 나타내었고, 재령 28일의 경우에는 감소하는 경향을 나타내었으며, 일라이트를 치환율 시 미소하게 감소하는 경향을 나타내었다. 따라서, 유동성 및 강도특성 측면을 종합적으로 고려할 때 WRP 5%, FGD 5% 치환사용하는 경우가 최적의 배합인 것으로 판명되었다.

Keywords

References

  1. Choi, H.B. (2015). "Application of waste refractory aggregate as aggregate for concrete," Proceedings of the Korean Recycled Construction Resources Institute, 10(2), 295-296 [in Korean].
  2. Han, C.G. (2003). Building Materials Experiment, Kimoondang [in Korean].
  3. Han, C.G. (2013). Properties of high volume blast furnace slag concrete using recycled aggregate with incineration waste ash, Journal of the Korean Recycled Construction Resources Institute, 1(2), 107-113 [in Korean]. https://doi.org/10.14190/JRCR.2013.1.2.107
  4. Korea Environment Corporation (2010). Set Quality Certification Criteria for Waste Gypsum Recycling Intermediate Processed Article Research [in Korean].
  5. Korean Agency for Technology and Standards (2016). KS L 5210 Furnace Slag Cement [in Korean].
  6. Lee, C.E. (2013). A Study on Application of Eco Construction Material Using Illite, Ph.D Thesis, Tongmyong University [in Korean].
  7. Lee, S.S., Bae, S.W., Song, H.Y. (2012). Physical properties of pastes and mortars based on mixing ratios of ternary system inorganic composites and addition percentage of alkali accelerator, Journal of the Architectural Institute of Korea Structure & Construction, 28(12), 77-84 [in Korean]. https://doi.org/10.5659/JAIK_SC.2012.28.12.77
  8. Park, S.J., Kim, J.H., Hyung, W.G. (2015). Properties of non-sintered cmenent mortar using alkali and sulfate mixed stimulants according to curing method, Journal of the Korea Concrete Institute, 27(3), 236-243 [in Korean].
  9. Park, K.T. (2011). "Proposal of optimized mix proportion of blast furnace slag mortar using the recycled fine aggregates depending on binder types and contents," Proceedings of the Korean Recycled Construction Resources Institute, 6(1), 37-38 [in Korean].
  10. Son, G.M. (2002). USN-based Measurement of Greenhouse Environment and Prediction of $CO_2$ Emission from Soil, Ph.D Thesis, Sungkyunkwan University [in Korean].
  11. Yang, K.H., Sim, J.I., Song, J.G., Lee, J.H. (2011). Material properties of slag-based alkali-activated concrete brick masonry, Journal of Architecture Institute of Korea, 27(1), 119-126 [in Korean].