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http://dx.doi.org/10.14190/JRCR.2018.6.3.207

A Study on the Pozzolan Reactivity and Mechanical Characteristic of Blended Portland Cements using CFBC Fly Ash  

Park, JongTak (Kumryun)
Oh, Hongseob (Department of Civil Engineering, Gyeongnam National University of Science and Technology)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.6, no.3, 2018 , pp. 207-213 More about this Journal
Abstract
Nowadays, circulating fluidized bed combustor(CFBC) boilers system that can reduce environmental pollution particles are widely used in electric power plants. But the fly ash generated from CFBC boilers has lower $SiO_2$ and higher MgO and $SO_3$ contents and also has free CaO inducing expansion and abrupt initial setting of concrete. Therefore, revised KSL5405 for CFBC fly-ash as well as pulverized coal combustion(PCC) is introduced in the concrete field. In this study, the chemical properties and mechanical properties of blended cements with PCC and CFBC fly-ash produced in Korea are analyzed. The blended cement with only CFBC fly ash shows a lower length change than OPC but a higher flow change ratio. The compressive strength of blended cement paste with PCC and CFBC fly ash is slightly greater than that of cement paste with only PCC fly-ash. Based on the results, CFBC flyash blended cement products should be used with PCC flyash to ensure the material stability and material properties.
Keywords
CFBC Fly ash; Pozzolan reactivity; Mechanical properties;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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