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J. Korean Ceram. Soc. > Volume 51(2); 2014 > Article
Journal of the Korean Ceramic Society 2014;51(2): 57.
doi: https://doi.org/10.4191/kcers.2014.51.2.57
플라이애시로 표면개질한 바텀애시 경량골재의 물리 화학적특성
김형기, 하경애1, 장정국1, 이행기1
조선대학교 건축학부
1한국과학기술원 건설 및 환경공학과
Mechanical and Chemical Characteristics of Bottom Ash Aggregates Cold-bonded with Fly Ash
Hyeong-Ki Kim, Kyung-Ae Ha1, Jeong-Gook Jang1, Haeng-Ki Lee1
School of Architecture, Chosun University
1Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology(KAIST)
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.
Key words: Fly ash, Agglomeration/agglomerates, Cements, Mechanical properties, Chemical properties
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