Influence of the Oxidation Process of Carbon Material on the Mechanical Properties of Cement Mortars
Publication: Journal of Materials in Civil Engineering
Volume 23, Issue 3
Abstract
The present research investigates how the addition of processed carbon materials affects the mechanical properties of cement mortars. Five types of oxidation treatments (air at 250°C, air at 410°C, ozone, , and ) were applied to graphite powder, powdered carbon fiber, and short carbon fiber to assess the influence of the modification of the carbon material surface in the interaction between cement paste and carbon material. The best oxidation treatment in terms of mechanical strength improvement was oxidation by air at 410°C because this procedure yielded the highest amount of oxygen surface functional groups, thus producing a better interaction with cement paste. Ozone treatment has also been shown to produce a high level of improvement in mechanical properties, but in this case the properties are improved because of the rough surface of the carbon materials.
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Acknowledgments
The writers would like to thank Spain’s Ministerio de Educación y Ciencia and Ministerio de Ciencia e Innovación for the support provided through projects UNSPECIFIEDBIA2006-10703 and UNSPECIFIEDMAT2009-10866, respectively. The writers also greatly appreciate the help given by J. Rivera-Utrilla from the Inorganic Chemistry Department of the Univ. of Granada (Spain). E. Zornoza would like to thank Spain’s Ministerio de Ciencia e Innovación of Spanish Government for financial support through the Juan de la Cierva Program.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 23 • Issue 3 • March 2011
Pages: 321 - 329
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Sep 11, 2009
Accepted: Sep 23, 2010
Published online: Sep 27, 2010
Published in print: Mar 1, 2011
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