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http://dx.doi.org/10.14190/JRCR.2019.7.2.101

Analysis the Use of Concrete Fine Aggregates of Coal Gasification Slag  

Park, Kyung-Taek (Department of Architectural Engineering, Cheong-ju University)
Han, Min-Cheol (Department of Architectural Engineering, Cheong-ju University)
Hyun, Seung-Yong (Department of Architectural Engineering, Cheong-ju University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.7, no.2, 2019 , pp. 101-108 More about this Journal
Abstract
This study is analysis of the utilization as a concrete fine aggregate on CGS, a by-product of Integrated coal gasification combined cycle(IGCC). That is, in KS F 2527 "Concrete aggregate," properties of 1~12times to CGS were evaluated, focusing on quality items corresponding to natural aggregate sand(NS) and melted slag aggregate sand(MS). As a result, the distribution of grain shape, safety and expansion were all satisfied with KS standards by physical properties, but the quality was unstable at 7~12times of water absorption ratio and absolute dry density. The particle size distribution was unstable due to asymmetry distribution of coarse particles, and particles were too thick for 7~12times. The passing ratio of 0.08mm sieve was also out of the KS standard at part factor of 7~12times, but chloride content, clay contents, coal and lignite were all satisfactory. Meanwhile, chemical composition was satisfactory except for $SO_3$ in 1~6times, and content and amount of harmful substances were all within the specified value except for F in 7~12times. As a result of SEM analysis, the surface quality and porosity were 7~12times more than 1~6times, and it was the quality was degraded. Therefore, it is necessary to reduce the quality deviation by using separate measures in order to utilize it as concrete aggregate in the future, and if it is premixed with fine quality aggregate, it will contribute positively to solve aggregate supply shortage and utilize circulation resources.
Keywords
Integrated coal gasification combined cycle; Coal gasification slag; Concrete fine aggregate; Properties;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 KEPCO. (2018). Statistics of Electric Power in Korea, 87 [in Korean].
2 Kim, B.K., Lee, S.J., Chon, C.M., Choi, H.S. (2018). Potential of coal gasification slag as an alkali-activated cement, Journal of the Korea Institute of Resources Recycling, 27(2), 38-47 [in Korean].   DOI
3 Kim, S.C. (2011). Ceramic Material and IGCC (Integrated Gasification Combined Cycle), News & Information for Chemical Engineers, 29(5), 600-604 [in Korean].
4 Korea Agency for Technology and Standards. (2016). KS F 2527 (Concrete Aggregate), Korea Standard [in Korean].
5 Han, C.G., Park, B.M. (2017). Analyzing the engineering properties of cement mortar using mixed aggregate with reject ash, Journal of Korean Recycled Construction Resources Institute, 5(3), 247-252 [in Korean].   DOI
6 Han, M.C., Moon, B.Y. (2017). The effect of combinations of electric arc furnace slag and lime stone aggregates on engineering properties of ultra high strength concrete with 80MPa, Journal of the Korean Recycled Construction Resources Institute, 5(3), 253-260 [in Korean].   DOI
7 Korea Electric Association. (2014). Journal of the Electric World, 452, 29-34 [in Korean].
8 Korea Power Exchange. (2019). Electric Power Statistics Information System, EPSIS [in Korean].
9 Oh, S.H., Seo, C.H. (1997). An experimental study on the properties of concrete with replacement of fine aggregate by reject-ash, Architectural Institute of Korea, 17(2), 1311-1315.
10 Woo, S.K., Kim, S.Y., Hong, K.S., Seo, D.W. (2010). CCS and IGCC (Integrated Gasification Combined Cycle), Ceramist, 13(2), 32-40 [in Korean].
11 Yu, M.Y., Lee, J.Y., Chung, C.W. (2009). The property estimation of fine aggregate blended with natural, crushed, and recycled fine aggregate, Journal of the Architectural Institute of Korea Structure & Construction, 25(11), 113-120.