Title:
Use of Relatively High Fe2O3 Steel Slag as Coarse Aggregate in Concrete
Author(s):
Hisham Qasrawi
Publication:
Materials Journal
Volume:
109
Issue:
4
Appears on pages(s):
471-478
Keywords:
compressive strength; density; steel slag; tensile strength; workability.
DOI:
10.14359/51683922
Date:
7/1/2012
Abstract:
Unprocessed steel slag from local sources, which is characterized by its relatively high content of Fe2O3, has been introduced in concrete mixtures, partly or fully replacing the normal coarse aggregate. Various mixtures have been studied in the lab to evaluate the impact of these aggregates on some of the properties of concrete. The use of steel slag reduced the workability of concrete. Replacements up to 50% did not have a drastic effect on the workability. Strength results at various ages showed that both the compressive and tensile strengths of concrete increased when slag was introduced, irrespective of the replacement ratio or the age of the concrete. The strength development of concrete is enhanced when slag is incorporated. The air-free density increased, but the strength-density ratio was higher for concrete containing slag, indicating that the increase in density may not be a problem. Broken samples kept under lab conditions showed no staining.