Architectural research

  • 제12권1호
  • /
  • Pages.49-55
  • /
  • 2010
  • /
  • 1229-6163(pISSN)
  • /
  • 2383-5575(eISSN)
대한건축학회 (Architectural Institute of Korea)
권호 표지
DOI QR코드

DOI QR Code

Use of Stone Powder Sludge in Fly Ash-Based Geopolymer

  • 투고 : 2010.03.03
  • 발행 : 2010.06.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Stone powder sludge is a by-product of the manufacturing process of crushed sand. Most of it is dumped with soil in landfills, and the disposal of stone powder sludge causes a major environmental problem. This paper investigates the applicability of stone powder sludge in fly ashbased geopolymer. For this, stone powder sludge was used to replace fly ash at a replacement ratio of 50% and 100% by weight. The compressive strength of the samples was measured and scanning electron microscopy/ energy dispersive spectroscopy (SEM/EDS) analysis and X-ray diffraction (XRD) were performed. The test results indicated that the optimum level of the alkali activator ratio ($Na_2SiO_3$/NaOH) for fly ash-based geopolymer using stone powder sludge was 1.5. The strength development is closely related to the NaOH solution concentration. In addition, the compressive strength of the sample cured at $25^{\circ}C$ was significantly improved between 7 days and 28 days, even though the strength of the sample showed the lowest value at 7 days. Microscopy results indicated that a higher proportion of unreacted fly ash spheres remained in the sample with 5M NaOH, and some pores on the surface of the sample were observed.

키워드

참고문헌

  1. Alonso S., and Palomo A. (2001) "Calorimetric study of alkaline activation of calcium hydroxide-metakaolin solid mixtures." Cement and Concrete Research, 31: 25-30 https://doi.org/10.1016/S0008-8846(00)00435-X
  2. Carroll D. et al. (1998) "U.S. Portland cement industry, concrete and global climate." Proceedings of the 1998 $91^{st}$ Annual Meeting and Exhibition, 9
  3. Choi S.J., Jeong Y., Kang W.S., Park C.S., Lee S.Y., Yeo B.C., and Lee S.S. (2006) "Influence of W/B ratio and replacement ratio of crushed sand on the fluidity and compressive strength of high strength concrete." Proceedings of $8^{th}$ Jap./Kor. Joint symposium on Building Materials & Construction, 8: 153-158
  4. Davidovits J. (1988) "Soft Mineralurgy and Geopolymer." In proceeding of Geopolymer 88 International Conference, the Universite de Technologie, Compiene, France
  5. Davidovits J. (1989) "Geopolymers: Inorganic Polymeric New Materials." J of thermal analysis, 37: 1633
  6. Davidovits J. (1999) "Chemistry of geopolymer systems, terminology." In proceedings of Geopolymer '99 International Conference, France
  7. Duxson P., Fernandez-Jimenez A., Provis J.L., Lukey G.C., Palomo A., and van Deventer J.S.J. (2007) "Geopolymer technology: the current state of the art." J of Mater Sci, 42: 2917-2933 https://doi.org/10.1007/s10853-006-0637-z
  8. Fernandez-Jimenez A., Garcia-Lodeiro I., and Palomo A. (2007) "Durability of alkali-activated fly ash cementitious materials." J of Mater Sci, 42: 3055-3065 https://doi.org/10.1007/s10853-006-0584-8
  9. Fernandez-Jimenez A., Palomo J.G. and Puertas F. (1999) "Alkali-activated slag mortars; Mechanical strength behavior." Cement and Concrete Research, 29: 1313-1321 https://doi.org/10.1016/S0008-8846(99)00154-4
  10. Gartner E. (2004) "Industrially interesting approaches to "$low-CO_2$" cements." Cement and Concrete Research, 34: 1489-1498 https://doi.org/10.1016/j.cemconres.2004.01.021
  11. Han C.G., Shin B.C., Kim G.C. and Lee S.T. (2001) "Strength and absorption properties of cement mortar produced with various content of sludge powder at mines, J of the Korea Concrete Institute, 13, 561-567
  12. Kim J.M., Jeong J.Y., Kim B.J. and Choi S.J. (2006) "The density and strength properties of lightweight foamed concrete using stone powder sludge in hydrothermal reaction condition." J of the Korea Concrete Institute, 18: 687-693 https://doi.org/10.4334/JKCI.2006.18.5.687
  13. Kong D., Sanjayan J. and Sagoe-Crentsil K. (2006) "The behaviour of Geopolymer paste and concrete at elevated temperatures." International Conference on Pozzolan, concrete and Geopolymer, Thiland, 105-119
  14. Sofi M. et al. (2007) "Bond performance of reinforcing bars in inorganic polymer concrete (IPC)." J of Material Science, 42: 3107-3116 https://doi.org/10.1007/s10853-006-0534-5
  15. Takayuki F. and Masaru Y. (2002) "Applicability of crush stone powder and recycled concrete powder to high fluidity concrete." J of society of materials science, 51: 1105-1110 https://doi.org/10.2472/jsms.51.1105
  16. Wang S.D., Karen L. Scrivener and Pratt P.L. (1994) "Factors affecting the strength of alkali-activated slag." Cement and Concrete Research, 24: 133-1043 https://doi.org/10.1016/0008-8846(94)90094-9
  17. Xu A. In. Chandra S (ed) (1997) Waste materials used in concrete manufacturing, Noyes Publications, 141-173