Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지
DOI QR코드

DOI QR Code

Characterization of Artificial Aggregates Fabricated by Using Various Forming Methods

다양한 성형법으로 제조된 인공 골재의 특성

  • Published : 2009.01.31
Download PDF
⟨ Previous Next ⟩

Abstract

The physical properties of artificial aggregates made from clay and inorganic wastes with poor plasticity depends largely on forming method. The artificial aggregates composing of coal fly ash, stone sludge and clay were fabricated using 4 different forming methods and those physical properties were comparatively analyzed. The surface of aggregates made through the extrusion forming process was dense and smooth but was rough for the aggregates obtained by crushing a tile-shaped green body. The aggregates made by pelletizing process had a weak green strength and bumpy surface. The shell generated at surface during a high temperature sintering process induced the most aggregates to be bloated due to a dense shell. But the aggregates made through pelletizing process with dense surface layer showed no significant change in bulk density with sintering temperatures. The water absorption of aggregates decreased with sintering temperature, and that of pelletized specimen was standing $1.8{\sim}2.2$ times higher than that of made by other forming methods. It is concluded that the aggregates having various properties could be fabricated from one batch by using different forming methods.

Keywords

References

  1. Y. B. Chai, “Materials Mineral of Lightweight Aggregates,” Mineral and Industry, 3 [1] 124-31 (2002).
  2. T. Y. Lo, H. Z. Cui, and Z. G. Li, “Influence of Aggregate Pre-wetting and Fly Ash on Mechanical Properties of Lightweight Concrete,” J. Waste Management, 24 [4] 333-38 (2004). https://doi.org/10.1016/j.wasman.2003.06.003
  3. T. Y. Lo and H. Z. Cui, “Effect of Porous Lightweight Aggregate of Strength of Concrete,” Mater. Lett., 58 [6] 916-19 (2004). https://doi.org/10.1016/j.matlet.2003.07.036
  4. KS F 2503; Testing Method for Density and Absorption of Coarse Aggregates, Korean Standards Association, 2007.
  5. A. Denis, A. Attar, D. Breysse, and J. J. Chauvin, “Effect of Coarse Aggregates on the Workability of Sandcrete,” Cement and Concrete Res., 32 701-6 (2002). https://doi.org/10.1016/S0008-8846(01)00746-3
  6. S. S. Jamkar and C. B. K. Rao, “Index of Aggregate Particle Shape and Texture of Coarse Aggregate as a Parameter for Concrete Mix Proportioning,” Cement and Concrete Res., 34 2021-7 (2004). https://doi.org/10.1016/j.cemconres.2004.03.010
  7. M. N. Bouquety, Y. Descantes, L. Barcelo, F. de Larrard, and B. Clavaud, “Experimental Study of Crushed Aggregates Shape,” Construction and Building Mater., 21 865-72 (2007). https://doi.org/10.1016/j.conbuildmat.2005.12.013
  8. C. M. Riley, “Relation of Chemical Properties to the Bloating of Clay,” J. Am. Ceram. Soc., 34 [4] 121-8 (1951). https://doi.org/10.1111/j.1151-2916.1951.tb11619.x
  9. S. M. Han, D. Y. Shin, and S. K. Kang, “Preparation for Porous Ceramics Using Low Grade Clay,” J. Kor. Ceram. Soc., 35 [6] 575-82 (1998).
  10. J. L. Clarke, “Structural Lightweight Aggregate Concrete,” pp. 3-5, Chapman & Hall, UK, 1993.
  11. J. B. Cripwell, “What is PFA?,” Concrete, 26 [3] 11-3 (1992).
  12. J. Park and Y. Kim, “Microstructural Observation of Artificial Aggregates at Various Sintering Atmospheres,” J. Kor. Cryst. Growth and Cryst. Tech., 16 [2] 71-5 (2006).
  13. K. Kim and S. Kang, “Manufacturing Artificial Lightweight Aggregates using Coal Bottom Ash and Clay,” J. Kor. Cryst. Growth and Cryst. Tech., 17 [6] 277-82 (2007).
  14. James S. Reed, “Principles of Ceramics Processing,” pp. 355-68, John Wiley & Sons. Inc., New York, 1989.