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http://dx.doi.org/10.4191/kcers.2014.51.2.57

Mechanical and Chemical Characteristics of Bottom Ash Aggregates Cold-bonded with Fly Ash  

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))
Publication Information
Journal of the Korean Ceramic Society / v.51, no.2, 2014 , pp. 57-63 More about this Journal
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
Fly ash; Agglomeration/agglomerates; Cements; Mechanical properties; Chemical properties;
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