Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 146, Issue -, Pages 644-651Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2017.04.164
Keywords
BOF slag; Aggregates; Scrubbing attrition; Chelating reaction
Ask authors/readers for more resources
Excessive free lime in the BOF slag will react with water and causes serious expansion, and thus, results in its reutilization difficulty. In this study, scrubbing attrition and chelating reagent treatment were used to remove free lime from BOF slag. After removing free lime, the BOF slag was used as fine aggregate for making cement mortar. Under different curing periods, the specimens were characterized for their physical and mechanical properties, ultrasound conduction velocity, and volume expansion. By reducing free calcium oxide through attrition and chelating processes, the expansion rate of specimen can be reduced to 0.16%. The compressive strength and flexural strength of cement mortars prepared with BOF slag can reach 45.4 MPa and 7.1 MPa, respectively. The test results suggested that the scrubbing and chelating treatments can effectively remove free-calcium oxide and improve expansion and strength development of concrete mortar. (C) 2017 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available