Strength Activity Index of Air Quenched Basic Oxygen Furnace Steel Slag

被引:15
|
作者
Gan, Lei [1 ,2 ]
Wang, Hai-feng [2 ]
Li, Xiu-ping [2 ]
Qi, Yuan-hong [2 ]
Zhang, Chun-xia [2 ]
机构
[1] Jiangxi Univ Sci & Technol, Sch Met & Chem Engn, Ganzhou 341000, Jiangxi, Peoples R China
[2] Cent Iron & Steel Res Inst, State Key Lab Adv Steel Proc & Prod, Beijing 100081, Peoples R China
基金
中国国家自然科学基金;
关键词
basic oxygen furnace steel slag; strength activity index; Mineral characteristics; cementitious property; tricalcium silicate (C-3 S); HYDRATION KINETICS; BLENDED CEMENTS; IRON;
D O I
10.1016/S1006-706X(15)60033-4
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
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 m(2)/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.
引用
收藏
页码:219 / 225
页数:7
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