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Carbonation Treatment of EAF Slag for Using Aggregate of Concrete  

Yoo, Kwang-Suk (Korea Institute of Geoscience and Mineral Resource)
Ahn, Ji-Whan (Korea Institute of Geoscience and Mineral Resource)
Lee, Kyung-Hoon (POSCO)
Publication Information
Resources Recycling / v.18, no.3, 2009 , pp. 36-41 More about this Journal
Abstract
The objectives of this study are focusing on the issue with efficiently recycling for EAF slag as construction material such as an aggregate of concrete. This study can be classified mainly into two categories: the first section is the carbonation treatment of Electric Arc Furnace(EAF)-slag for obtaining soundness as using aggregate of concrete. And the second section is the application of carbonated EAF-slag on the mortar test to evaluate the stability and mechanical property, which is compressive strength, according to the replacement of EAF-slag on the mortar. It was known that pH of EAF-Slagle according to carbonation time decreases drastically to 7 within several sec of carbonation, and a calcite is formed on the surface of EAF slag. The formation of calcite during the carbonation process of EAF slag lead to fill at pore in the texture of EAF-Slag surface, and than the porosity of EAF-slag decreases with carbonation process. In the mortar test, compressive strength, according to the replacement of EAF-Slag to sand on the mortar, the compressive strength of mortar increased as the 50% replacement ratio of EAF slag for sand was above 10% higher than that of reference mortar according to 50% replacement of EAF slag.
Keywords
EAF-Slag; Carbonation; Compressive strength; Stabilization;
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1 Mises Frias Rojas, M.L Sanchez de Rojas, 2004 : 'Chemical assessment of the electric arc furnace slag as construction material: Expansive compounds', Cement and Concrete Research 34(2), pp. 1881-1888   DOI   ScienceOn
2 Sakata, K, and Ayano, T., 1997 : 'The Effect of Ambient Temperature on Creep and Sbrinkage of Concrete,' Presented at the 1997 Fall Convention, ACI, Atlanta, Georgia, USA, Nov. 9-14
3 S. D. Wang and K. L. Scrivener, 1995 : 'Hydration Products of Alkali Activated Slag Cement,' Cern. Concr. Res., 25(3), pp. 561-571   DOI   ScienceOn
4 Frias, M. de Rojas, M. L S. Jose, J. T S. Bollati, R. Uria, A, 2003, 'Chemcial stability of electric arc furnace slag', International conference on the environmental and technical implications of construction with altemative materials; WASCON, pp. 833-836
5 A Fernandez-Jimenez, F. Puertas and A. Arteaga, 1998 : 'Determination of kinetic equation of alkaline activation of blast furnace slag by means of Calorimetric data,' Journal of Thermal Analysis, 52, pp. 945-955   DOI   ScienceOn
6 A R. Brough and A Atkinson, 2002 : 'Sodium SilicateBased, Alkali-Activated Slag Mortars: Part 1. Strength, Hydration and Microstructure,' Cern. Concr. Res., 32(6), pp. 865-879   DOI   ScienceOn
7 H. Mozt, J. Geiseler, in: G R. Woolley, J. J. J. M., 2000 : Inter. Conf. on the Science and Engineering of Recycling for Environmental Protection, WASCN, Harrogate (UK), vol 1, 2000, pp. 207