Properties and hydration of blended cements with steelmaking slag
- National Technical University of Athens, School of Chemical Engineering, Laboratory of Analytical and Inorganic Chemistry, 9 Heroon Polytechniou St, 15773 Athens (Greece)
- National Technical University of Athens, School of Mining and Metallurgical Engineering, Laboratory of Physical Metallurgy, 9 Heroon Polytechniou St, 15780 Athens (Greece)
- Hellenic Cement Research Center Ltd, Heracles Group, 15 K. Pateli, 14123, Lykovrissi, Athens (Greece)
The present research study investigates the properties and hydration of blended cements with steelmaking slag, a by-product of the conversion process of iron to steel. For this purpose, a reference sample and three cements containing up to 45% w/w steel slag were tested. The steel slag fraction used was the '0-5 mm', due to its high content in calcium silicate phases. Initial and final setting time, standard consistency, flow of normal mortar, autoclave expansion and compressive strength at 2, 7, 28 and 90 days were measured. The hydrated products were identified by X-ray diffraction while the non-evaporable water was determined by TGA. The microstructure of the hardened cement pastes and their morphological characteristics were examined by scanning electron microscopy. It is concluded that slag can be used in the production of composite cements of the strength classes 42.5 and 32.5 of EN 197-1. In addition, the slag cements present satisfactory physical properties. The steel slag slows down the hydration of the blended cements, due to the morphology of contained C{sub 2}S and its low content in calcium silicates.
- OSTI ID:
- 20995385
- Journal Information:
- Cement and Concrete Research, Vol. 37, Issue 6; Other Information: DOI: 10.1016/j.cemconres.2007.03.008; PII: S0008-8846(07)00076-2; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0008-8846
- Country of Publication:
- United States
- Language:
- English
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