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| Strength Activity Index of Air Quenched Basic Oxygen Furnace Steel Slag |
| Lei GAN1,2,Hai-feng WANG2,Xiu-ping LI2,Yuan-hong QI2,Chun-xia ZHANG2 |
1. School of Metallurgical and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China
2. State Key Laboratory of Advanced Steel Processes and Products, Central Iron and Steel Research Institute, Beijing 100081, China |
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Abstract Air quenched basic oxygen furnace steel slag (BOF-SS) is processed at very high cooling rate, which is expected to have different cementitious properties from conventional slowly cooled BOF-SS. For this purpose, the strength activity indexes of air quenched and slowly cooled BOF-SS are investigated. The results reveal that, under the specific surface area (S) of 490 m2/kg, the compressive strength activity index reaches 1.24 after 28 days with replacement of 15% air quenched BOF-SS and reaches 1.05 after 28 days with replacement of 20% air quenched BOF-SS and 30% granulated blast furnace slag (GBFS). The cementitious activity of air quenched BOF-SS is obviously higher than that of slowly cooled BOF-SS, mainly because it contains more C3S and glassy phases.
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Received: 09 August 2013
Published: 06 March 2015
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| Fund:National Outstanding Youth Science Foundation of China |
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Corresponding Authors:
Lei GAN
E-mail: ganlei2005@gmail.com
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2015, Vol. 22 
