Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
권호 표지
DOI QR코드

DOI QR Code

Compressive Strength Properties of Geopolymer Using Power Plant Bottom Ash and NaOH Activator

화력발전소 바텀애쉬와 수산화나트륨 활성화제를 이용해 제작한 지오폴리머의 압축강도 특성

  • An, Eung-Mo (Dept. of Architectural Engineering, Chungnam National University) ;
  • Cho, Sung-Baek (Korea Institute of Geoscience and Mineral Resource) ;
  • Lee, Su-Jeong (Korea Institute of Geoscience and Mineral Resource) ;
  • Miyauchi, Hiroyuki (Dept. of Architectural Engineering, Chungnam National University) ;
  • Kim, Gyu-Yong (Dept. of Architectural Engineering, Chungnam National University)
  • Received : 2011.12.07
  • Accepted : 2012.01.09
  • Published : 2012.02.27
Download PDF
⟨ Previous Next ⟩

Abstract

When a new bonding agent using coal ash is utilized as a substitute for cement, it has the advantages of offering a reduction in the generation of carbon dioxide and securing the initial mechanical strength such that the agent has attracted strong interest from recycling and eco-friendly construction industries. This study aims to establish the production conditions of new hardening materials using clean bottom ash and an alkali activation process to evaluate the characteristics of newly manufactured hardening materials. The alkali activator for the compression process uses a NaOH solution. This study concentrated on strength development according to the concentration of the NaOH solution, the curing temperature, and the curing time. The highest compressive strength of a compressed body appeared at 61.24MPa after curing at $60^{\circ}C$ for 28 days. This result indicates that a higher curing temperature is required to obtain a higher strength body. Also, the degree of geopolymerization was examined using a scanning electron microscope, revealing a micro-structure consisting of a glass-like matrix and crystalized grains. The microstructures generated from the activation reaction of sodium hydroxide were widely distributed in terms of the factors that exercise an effect on the compressive strength of the geopolymer hardening bodies. The Si/Al ratio of the geopolymer having the maximum strength was about 2.41.

Keywords

References

  1. S. Lee, M. D. Seo, Y. J. Kim, H. H. Park, T. N. Kim, Y. Hwang, S. B. Cho, Int. J. Miner. Process., 97, 20 (2010). https://doi.org/10.1016/j.minpro.2010.07.007
  2. W. Jiang and D. M. Roy, Am. Ceram. Soc. Bull., 71, 642 (1992).
  3. P. K. Mehta and O. E. Gjorv, Cement Concr. Res., 12(5), 587 (1982). https://doi.org/10.1016/0008-8846(82)90019-9
  4. A. Palomo, M. W. Grutzeck and M. T. Blanco, Cement Concr.. Res., 29, 1323 (1999). https://doi.org/10.1016/S0008-8846(98)00243-9
  5. F. Puertas, S. Martinez-Ramirez, S. Alonse and T. Vazquez, Cement Concr. Res., 30, 1625 (2000). https://doi.org/10.1016/S0008-8846(00)00298-2
  6. D. M. J. Sumajouw, D. Hardjito, S. E. Wallah and B. V. Rangan, J. Mater. Sci., 42, 3124 (2007). https://doi.org/10.1007/s10853-006-0523-8
  7. J. Davidovits, in proceedings of the World Congress Geopolymer (Saint Quentin, France, June 2005) p9-15.
  8. J. Davidovits, J. Therm. Anal., 37, 1633 (1991).
  9. P. Duxson, J. L. Provis, G. C. Lukey, J. S. J. van Deventer, Cement Concr. Res., 37, 1590 (2007). https://doi.org/10.1016/j.cemconres.2007.08.018
  10. P. Duxson, S. W. Mallicoat, G. C. Lukey, W. M. Kriven and J. S. J. Van Deventer, Colloid. Surface. Physicochem. Eng. Aspect., 292(1), 8 (2007). https://doi.org/10.1016/j.colsurfa.2006.05.044
  11. D. Khale and R. Chaudhary, J. Mater Sci., 42, 729 (2007). https://doi.org/10.1007/s10853-006-0401-4
  12. P. Duxson, J. L. Provis., G. C. Lukey., S. W. Mallicoat, W. M. Kriven and J. S. J. van Deventer, Colloid. Surface. Physicochem. Eng. Aspect., 269(1-3) 47 (2005). https://doi.org/10.1016/j.colsurfa.2005.06.060