Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
권호 표지
DOI QR코드

DOI QR Code

The Estimation of Optimal Mixing Ratio of CLSM Mixed with Red Mud and Paper Sludge Ash

Red mud와 제지회를 혼합한 CLSM의 적정 혼합비 산정

  • Roh, Seongoh (Dept. of Civil Engineering, Korea National University of Transportation) ;
  • Kim, Taeyeon (Dept. of Civil Engineering, Korea National University of Transportation) ;
  • Lee, Bongjik (Dept. of Civil Engineering, Korea National University of Transportation)
  • Received : 2022.02.16
  • Accepted : 2022.03.21
  • Published : 2022.04.01
Download PDF
⟨ Previous Next ⟩

Abstract

Recently, numerous studies are being performed to examine alkali-activated cement which uses industrial by-products, such as GGBS and fly ash, as well as alkali activators. Alkali-activated cement is a type of binder that exerts the same strength as cement without using cement by mixing industrial by-products with alkali activators. Alkali activators, which are used mainly for carbon-reducing technologies and alkali activation, are expensive and difficult to apply in the field due to risks related to strong alkalinity. Therefore, this study intends to explore methods to use red mud as a substitute for an alkali activator. To that end, this study has evaluated engineering properties, such as flow and strength, of CLSM that uses red mud and paper sludge ash as binders and its possibility to cause soil pollution. This study also aims to present the appropriate mixing ratios of red mud and paper sludge ash to produce CLSM.

최근 GGBS 및 Fly ash 등과 같은 산업부산물과 알칼리 자극제를 활용한 알칼리 활성화 시멘트에 대한 연구가 활발히 진행되고 있다. 알칼리 활성화 시멘트는 산업부산물에 알칼리 자극제를 혼합함으로 시멘트를 사용하지 않고 강도를 발휘하는 결합재의 일종으로 대표적인 탄소저감 기술이나, 알칼리 활성화를 위해 사용되는 알칼리 자극제는 고가이며 강알칼리성으로 인한 위험성으로 현장적용에 여러 어려움이 있다. 이에 본 연구에서는 알칼리 자극제의 대체재로 Red mud의 활용방안을 모색하고자 Red mud와 제지회를 결합재로 활용한 CLSM의 유동특성, 강도특성 등의 공학적 특성과 토양오염 발생가능성을 평가하였으며, Red mud와 제지회를 혼합한 CLSM의 적정 혼합비를 제시하였다.

Keywords

References

  1. ACI Committee 229 (2005), Controlled Low Strength Materials (CLSM), American Concrete Insitute, 229R-2, pp. 1~12.
  2. ASTM D 6103 (2004), Standard test method for flow consistency of controlled low strength material (CLSM), West conshohocken, PA. pp. 1~3.
  3. Japan Civil Engineering Research Institute (2007), Technical Notes of Fluidization Surplus Soil.
  4. Kang, S. P. (2012), A study on the usability of red mud as activator of alkali-activated cementless Binder, Journal of the architectural institute of Korea structure and construction, Vol. 28, No. 11, pp. 133~140 (In Korean). https://doi.org/10.5659/JAIK_SC.2012.28.11.133
  5. Kang, S. P. and Hwang, B. I. (2018), Strength and efflorescence characteristics of alkali-activated slag cement mortar with red mud according to curing conditions, Journal of the Korea Institute of Building Construction, Vol. 18, No. 3, pp. 267~275 (In Korean). https://doi.org/10.5345/JKIBC.2018.18.3.267
  6. Kang, S. P. and Kang, H. J. (2017), Pore and efflorescence characteristics of alkali activated slag-red mud cement mortar depending on red mud content, Journal of the Korea Institute of Building Construction, Vol. 17, No. 3, pp. 261~268 (In Korean). https://doi.org/10.5345/JKIBC.2017.17.3.261
  7. Kang, S. P. and Kang, H. J. (2019), Characteristics of redmud ceramics by sintering temperature and raw materials of clay bricks, Journal of the architectural institute of Korea structure and construction, Vol. 30, No. 10, pp. 199~206 (In Korean).
  8. Kang, S. P. and Kwon, S. J. (2017), Effects of red mud and alkali-activated slag cement on efflorescence in cement mortar, Construction and Building Materials, Vol. 113, No. 15, pp. 459~467. https://doi.org/10.1016/j.conbuildmat.2016.12.123
  9. Koh, T. H., Lee, S. G., Shin, M. H., Kim, B. S., Lee, J. K. and Lee, T. Y. (2010), "Evaluation for contents of contaminants and leaching characteristics of bottom ash", Journal of the Korean Geo-Environmental Society, Vol. 11, No. 6, pp. 77~83 (In korean).
  10. Lee, Y. A., Lee, H. J. and Kim, Y. S. (2002), A study on the application of paper fly ash as stabilization/hardening agent, Journal of the Korean Geo-Environmental Society, Vol. 3, No. 2, pp. 23~33(In Korean).
  11. Lee, Y. S., Kim, T. Y. and Lee, B. J. (2020), Engineering characteristics of CLSM with regard to the particle size of bottom ash, Journal of the Korean Geo-Environmental Society, Vol. 21, No. 10, pp. 5~10 (In Korean). https://doi.org/10.14481/JKGES.2020.21.10.5
  12. Maria, M. and Shamil, S. (2021), Alkali-acticated slag concrete with paper industry waste, Waste Management and research : the journal for a sustainable circular economy, Vol. 39, No. 3, pp. 466~472. https://doi.org/10.1177/0734242X20983890
  13. Susan, A. B., Richard, J. B., Oday, H. H., Andrew, H. and John, P. (2014), Paper sludge ash as precursor for productiom of alkali-activated materials, 2nd International conference on advances in chemically activated materials, Changsha, China, pp. 1~8.