Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Mechanical and Chemical Characteristics of Bottom Ash Aggregates Cold-bonded with Fly Ash

플라이애시로 표면개질한 바텀애시 경량골재의 물리 화학적특성

  • Kim, Hyeong-Ki (School of Architecture, Chosun University) ;
  • Ha, Kyung-Ae (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology(KAIST)) ;
  • Jang, Jeong-Gook (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology(KAIST)) ;
  • Lee, Haeng-Ki (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology(KAIST))
  • 김형기 (조선대학교 건축학부) ;
  • 하경애 (한국과학기술원 건설 및 환경공학과) ;
  • 장정국 (한국과학기술원 건설 및 환경공학과) ;
  • 이행기 (한국과학기술원 건설 및 환경공학과)
  • Received : 2014.02.07
  • Accepted : 2014.03.12
  • Published : 2014.03.31
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Abstract

Bottom ash can be used as pelletizing seeds in unsintered artificial lightweight aggregates, so it can be called as 'cold-bonded aggregates'. In the present study, the mechanical and chemical characteristics of bottom ash aggregates cold-bonded with fly ash were investigated. The crushing strength and the water transfer characteristic of the aggregates, which may affect the strength gain of the concrete, were evaluated. Moreover, the degree of hydration and the hydration products of the aggregates were analyzed to verify the chemical stability of the aggregates. Compared to commercialized artificial lightweight aggregates manufactured by sintering process, cold-bonded fly/bottom ash aggregates had similar levels of water transfer characteristics, while having lower strengths. The calcium hydroxide in the aggregates was almost completely consumed after 28 days moist curing.

Keywords

References

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