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http://dx.doi.org/10.14190/JRCR.2020.8.3.255

The Feasibility Study for Utilization of Blended Cement as a Activator of Bottom Ash from Circulating Fluidized Bed Combuster Boiler  

Park, JongTak (GW Korea)
Jung, Gwon Soo (GW Korea)
Kang, Chang Ho (GW Korea)
Oh, Hongseob (Department of Civil Engineering, Gyeongnam National University of Science and Technology)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.8, no.3, 2020 , pp. 255-262 More about this Journal
Abstract
Blended cement with fly ash and bottom ash from Circulating Fluidized Bed Combustor boiler(CFBC) burned at a low temperature, can be high heat of hydration and abnormal setting caused by higher volumn contents of Fe2O3, free-CaO, SO3. In this study, the ground CFBC bottom ash powder mixed with blast furnace slag was used as substitute activator of gypsum and recycled iron slag was produced from mix and pulverized by ball mill to increase the recycling rate. The effect on compressive strength of cements with the mixture of original and hydrated bottom ash mixtures with BFS with small water, respectively, was analyzed, and it was found that the hydrated bottom ash activator was more effective in initial strength development. To improve the initial strength of blended cement, an activator mixed with a blast furnace slag and bottom ash mixing ratio of 5:95 and 10:90, respectively, the slag cement by about 6%, and it was analyzed to develop an initial strength similar to gypsum as a conventional activator.
Keywords
Activator; CFBC bottom ash; Initial strength; Portland blast-furnace slag cement;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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1 Chi, M., Huang, R. (2014). Effect of circulating fluidized bed combustion ash on the properties of roller compacted concrete, Cement and Concrete Composites, 45, 148-56.   DOI
2 Havlica, J., Brandstetr, J., Odler, I. (1998). Possibilities of utilizing solid residues from pressured fluidized bed coal combustion (PFBC) for the production of blended cements, Cement and Concrete Research, 28, 299-307.   DOI
3 Jeong, J.Y., Jang, S.Y., Choi, Y.C., Jung, S.H., Kim, S.I. (2015). Effects of replacement ratio and fineness of GGBFS on the hydration and pozzolanic reaction of high-strength high-volume GGBFS blended cement pastes, Journal of the Korea Concrete Institute, 27(2), 115-125 [in Korean].   DOI
4 Kang, Y.H., Jung, S.H. (2017). Material properties of circulating fluidized bed combustion fly ash and utilization of non-sintered cement field, Magazine of RCR, 12(2), 26-32 [in Korean].   DOI
5 Kang, Y.H., Lim, G.H., Kim, S.J., Choi, Y.C. (2018). Feasibility study on the use of CFBC ash as non-sintered binder, Journal of the Korea Institute for Structural Maintenance and Inspection, 22(5), 119-126 [in Korean].   DOI
6 Lee, G.H., Lee, S.H., Jo, U.J., Kim, G.S. (2015). Properties of modified slag binder using circulating fluidized bed combustion fly ash as activator, Proceeding of Korea Concrete Institute, 501-502 [in Korean].
7 Park, J., Oh, H. (2018). A study on the pozzolan reactivity and mechanical characteristic of blended portland cements using CFBC fly ash, Journal of the Korean Recycled Construction Resources Institute, 6(3), 207-213 [in Korean].   DOI
8 Park, J., Oh, H., Jung, G.S., Kang, C.H. (2020). Application on the CFBC fly ash as a stimulant to improve the early strength of hydration portland cement, Journal of the Korean Recycled Construction Resources Institute, 8(1), 8-16 [in Korean].   DOI
9 Sheng, G., Li, Q., Zhai, J., Li, F. (2007). Self-cementitious properties of fly ashes from CFBC boilers co-firing coal and high-sulphur petroleum coke, Cement and Concrete Research, 37, 871-876.   DOI
10 Park, J.T., Oh, H.S. (2009). Experimental study on the material characteristics of slag cement with various phosphogypsum materials, Journal of the Korea Concrete Institute, 21(6), 729-735 [in Korean].   DOI
11 Sim, J.S., Lee, K.G., Kim, Y.T., Kang, S.K. (2012). Hydration characteristics of coal-fly ash containing high CaO compound, Journal of the Korean Ceramic Society, 49(2), 185-190 [in Korean].   DOI
12 Wang, B., Song, Y.M. (2013). Methods for the control of volume stability of sulfur-rich CFBC ash cementitious system, Magazine of Concrete Research, 65(1), 1-5.   DOI
13 Xia, Y., Yan, Y., Hu, Z. (2013). Utilization of circulating fluidized bed fly ash in preparing non-autoclaved aerated concrete production, Construction and Building Materials, 47, 1461-1467.   DOI