Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

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

DOI QR Code

Strength Characteristic and Color Difference Analysis of Cement Mortar According to the Amount of Liquefied Red Mud

액상화 레드머드의 첨가량에 따른 시멘트 모르타르의 강도특성 및 색차 분석

  • Received : 2018.06.08
  • Accepted : 2018.06.21
  • Published : 2018.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

In the construction sector, new demands for aesthetics are increasing due to structural stability and improvement of living standard and consciousness level. On the other hand, Red Mud sludge is generated from aluminum hydroxide extraction process from Bauxite. Red mud sludge contains about 20% of $Fe_2O_3$ and represents a natural reddish brown. It is highly applicable to the construction industry. In this paper, red mud sludge with a water content of 50%, which is a by - product of the industry, was prepared as a liquid phase. The liquefied red mud was added to cement mortar and the strength and color difference of cement mortar were investigated according to the addition amount of liquefied red mud. As a result, the compressive strength decreased with increasing amount of liquefied red mud. The color of cement mortar containing liquefied red mud was found to be distributed in the range of YR series in all samples. As the amount of liquefied red mud increased, the color became darker.

건설분야에서는 구조적 안정성과 더불어 생활수준과 의식수준의 향상으로 미관에 대한 새로운 요구가 증대되고 있다. 한편 보크사이트로(Bauxite)부터 수산화알루미늄 추출공정에서 발생되는 레드머드 슬러지는 $Fe_2O_3$를 약 20% 함유하고 있어 자연스런 천연 황토색을 나타내며 건설산업분야에 활용 가능성이 높다. 본 논문에서는 산업부산물인 함수율 50%의 레드머드 슬러지를 액상으로 제조하여, 제조된 액상화 레드머드를 시멘트 모르타르에 첨가하여 액상화 레드머드의 첨가량에 따른 시멘트 모르타르의 강도 및 색차를 검토하였다. 그 결과 액상화 레드머드 첨가량이 증가할수록 압축강도는 증가하였으며 액상화 레드머드를 첨가한 시멘트 모르타르는의 색채는 모든 시험체에서 YR계열의 범위에 분포하는 것으로 나타나며 액상화 레드머드 첨가량이 증가할수록 색채는 뚜렷해지는 경향을 나타내었다.

Keywords

References

  1. Choi, J.J., Hwang, E.H., Moon, D.J. (2006). An experimental study on the flowability and compressive strength of color concrete mixed with pigments, Journal of The Korean Society of Civil Engineers, 26(3), 547-553 [in Korean].
  2. Daniel, V.R., Joao, A.L., Marcio, R.M. (2011). Potential use of natural red mud as pozzolan for portland cement, Materials Research, 14(1), 60-6. https://doi.org/10.1590/S1516-14392011005000001
  3. Jang, H.S., Lee, H.Y. (2007). "Analysis about color revelation degree of mortar that mixed pigment," Korea Concrete Conference Proceedings, 2007(11), 825-828.
  4. Kang, S.P., Kang, H.J. (2017). Evaluation of dispersion characteristics for liquefied red mud by viscosity and sediment Index, Journal of Korea Institute of Building Construction, 17(6), 517-525 [in Korean]. https://doi.org/10.5345/JKIBC.2017.17.6.517
  5. Kang, S.P., Kang, H.J. (2017). Pore and efflorescence characteristics of alkali activated slag-red mud cement mortar depending on red mud, Journal of Korea Institute of Building Construction, 17(3), 261-8 [in Korean]. https://doi.org/10.5345/JKIBC.2017.17.3.261
  6. Kang, S.P., Kwon, S.J. (2017). Effects of red mud and alkali-activated slag cement on efflorescence in cement mortar, Construction and Building Materials. 133, 459-467. https://doi.org/10.1016/j.conbuildmat.2016.12.123
  7. Kim, T.C. (2010). The Determination of Optimal Mixture Proportion and the Evaluation of Economic Benefits through Life Cycle Cost Analysis on Color Concrete Panel, Cheongju University, Korea.
  8. KS A 0062. (2013). How to Display by 3 Attributes of Color, KSA.
  9. Lee, J.Y., Go, S.S. (2003). Effect analysis of inorganic pigment on the colors of colored cement mortars applying CIE L*a*b* color system, Journal of the Architectural Institute of Korea Structure & Construction, 19(11), 125-132 [in Korean].
  10. Lee, M.H. (2003). Manufacture and application of color concrete, Magazine of the Korea Concrete Institute, 15(1), 43-48 [in Korean]. https://doi.org/10.4334/JKCI.2003.15.1.043
  11. Lee, S.H., Kim, G.D., Chung, S.Y. (2004). Hannam-dong juvenile education culture center - mix design of black concrete and application technology, Magazine of the Korea Concrete Institute, 16(3), 50-57 [in Korean] https://doi.org/10.22636/MKCI.2004.16.3.50
  12. Pan, Z., Cheng, L., Lu, Y., Yang, N. (2002). Hydration products of alkali-activated slag-red mud cementitious material, Cement and Concrete Research, 32(3), 357-362. https://doi.org/10.1016/S0008-8846(01)00683-4
  13. Pontikes, Y., Angelopoulos, G.N. (2013). Bauxite residue in cement and cementitious applications : current status and a possible way forward, Resources, Conservation and Recycling, 73(8), 53-63. https://doi.org/10.1016/j.resconrec.2013.01.005
  14. Seok, H.S. (2017). Color Revelation Characteristics of Black Mortar according to Colorant Type and Contents, Korea International University Of Transportation Graduate School of Global Convergence Department of Construction Engineering.
  15. Sin, G.O. (2014). Study on the Color Variation of Buildings by Daylight, Ph.D Thesis, Chungnam National University, Korea.