Characterization of fine lightweight aggregates sintered at floating state using by vertical furnace
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초록
The fine aggregates of below 2 mm size was fabricated using by the vertical furnace in which the aggregates could be sintered at floating state and its physical properties were analyzed. The liquid formed at the surface of specimens sintered at 1200~1300oC induced a gas in core to expand so the denser shell and porous core could be produced. The C series specimen fabricated by crushing an extruded body had an irregular shape and sharp edges but those became spheroidized by bloating due to gas expansion inside. The fine aggregates fabricated in this study was as light as floating in the water and had an apparent density of 0.68~1.08. The absorption rate was proportioned to a porosity showing that the pores in core was not closed completely. The properties of fine aggregates fabricated in vertical furnace were similar with those of in an electric muffle furnace but the sticking-together phenomenon by surface fusion was not occurred in the vertical furnace. The aggregates fabricated in this study had a little lower impact resistance than that of natural aggregate but satisfied the unit volume weight standard specified in KS.
Abstract
The fine aggregates of below 2 mm size was fabricated using by the vertical furnace in which the aggregates could be sintered at floating state and its physical properties were analyzed. The liquid formed at the surface of specimens sintered at 1200~1300oC induced a gas in core to expand so the denser shell and porous core could be produced. The C series specimen fabricated by crushing an extruded body had an irregular shape and sharp edges but those became spheroidized by bloating due to gas expansion inside. The fine aggregates fabricated in this study was as light as floating in the water and had an apparent density of 0.68~1.08. The absorption rate was proportioned to a porosity showing that the pores in core was not closed completely. The properties of fine aggregates fabricated in vertical furnace were similar with those of in an electric muffle furnace but the sticking-together phenomenon by surface fusion was not occurred in the vertical furnace. The aggregates fabricated in this study had a little lower impact resistance than that of natural aggregate but satisfied the unit volume weight standard specified in KS.
참고문헌 (13)
- Y.B. Chai, "Materials mineral of lightweight aggregates", Mineral and Industry, 3(1), pp.124~ (2002)
- T.Y. Lo, "Influence of aggregate pre-wetting and fly ash on mechanical properties of lightweight concrete", Waste Management, 24(4), pp.333~ (2004)
- T.Y. Lo, "Effect of porous lightweight aggregate of strength of concrete", Materials Letters, 58(6), pp.916~ (2004)
- K.H. Kwon, "The sand war at the coast of Busan and Tongyong, Reported at the Local section of Internet Chosun Ilbo", http:, news.chosun.com, pp.2008, ~
- J.H. Cha, "The development plans of housing complex for the recreation and tour in Gulup-Do, Reported at the Local section of Internet Donga Ilbo", http:, www.donga.com, pp.2008, ~
- 최세진, "수도권 부순모래의 품질현황 및 부순모래 대체율에따른 콘크리트의 특성에 관한 연구", 한국건축시공학회지, 5(1), pp.63~68 (2005), 한국건축시공학회
- S.D. Kang, "A study on manufacturing of autoclave lightweight concrete with fine sludge of crusined sand", Journal of the Korean Institute of Mineral and Energy Rewources Engineers, 35(3), pp.264~ (1998)
- J.S. Kim, "Experimental study on application of mortar using a recycled fine aggregates as a natural fine aggregates substitutes", The 32 Cement Symposium 32, pp.222~ (2005)
- H.J. Lee, "Fabrication and characterization of artificial aggregates using recycled resources", to be published in J. Kor. Ceram. Soc, 46(2) (2009)
- "KSF 2504 : Testing method for the density and absorption rate of fine aggrregates, Korean Standard Association", ~ (2003)
- "KSF 2505 : Testing method for the unit volume weight and void content of aggregates, Korean Standard Association", ~ (2003)
- "KS F 2534 : Standard of unit weight for sands and lightweight aggregates, Korean Standard Association", ~ (2003)
- "KS F 2581 : Testing method for determination of aggregates impacting value - Method of test for production control of aggregates, Korean Standard Association", ~ (2003)