Producing Portland cement from iron and steel slags and limestone
The slags from blast furnace (iron making) and converter (steel making) after magnetic separation are mixed with limestone of six different compositions. The ground materials are fired in a pilot plant scale rotary kiln to 1,350 C for 1 h. The clinker is cooled, crushed, mixed with 3% gypsum, and ground to fineness of more than 3,300 cm{sub 2}/g. Initial and final setting times, consistency of standard paste, soundness, free CaO, and compressive and fractural strengths after 3, 7, and 28 days are measured. Samples with higher lime saturation factor developed higher C{sub 3}S content and better mechanical properties. Blending 10% extra iron slag to a cement composed of 49% iron slag, 43% calcined lime, and 8% steel slag kept the compressive strength of concrete above standard values for type I ordinary Portland cement.
- Research Organization:
- Univ. of Technology, Isfahan (IR)
- OSTI ID:
- 20000434
- Journal Information:
- Cement and Concrete Research, Vol. 29, Issue 9; Other Information: PBD: Sep 1999; ISSN 0008-8846
- Country of Publication:
- United States
- Language:
- English
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