Carbonated Ladle Slag Fines for Carbon Uptake and Sand Substitute
Publication: Journal of Materials in Civil Engineering
Volume 21, Issue 11
Abstract
The possibility of using a carbonated ladle slag as a fine aggregate in concrete was investigated. The slag was treated with carbon dioxide to reduce the free lime content while binding gaseous into solid carbonates. The treatment took place with either a high concentration of at for or with a low concentration of at atmospheric pressure for . It was found that uptake by the slag particles between 300 and and by the slag particles smaller than were about 4.2 and 15.6% of their mass, respectively. The extractable CaO contents were estimated by titration and were found to be significantly reduced by carbonation treatment. The carbonated ladle slag was used as a fine aggregate in zero-slump press-formed compact mortar samples and compared to similar samples containing a control river sand. The strengths of the mortars made with the carbonated slag sand were comparable to the strengths of the normal river sand mortars. The use of carbonated ladle slag as a fine aggregate in concrete is shown to be a novel way of sequestering in a beneficial manner.
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Acknowledgments
The project was supported by Natural Science and Engineering Research Council (NSERC)NSERC of Canada and by St. Lawrence Cement. The writers extend their thanks to Mr. Chris Carozza of QIT-Fer et Titane for the supply of ladle slag and to Professor Roderick Guthrie of McGill University for his valuable advice.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 21 • Issue 11 • November 2009
Pages: 657 - 665
Copyright
© 2009 ASCE.
History
Received: Mar 28, 2008
Accepted: Mar 11, 2009
Published online: Oct 15, 2009
Published in print: Nov 2009
Notes
Note. Associate Editor: Jason Weiss
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