Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/242140
Type: Artigo
Title: Assessing the pozzolanic activity of cements with added sugar cane straw ash by synchrotron X-ray diffraction and Rietveld analysis
Author: Calligaris, G. A.
Franco, M. K. K. D.
Aldrige, L. P.
Rodrigues, M. S.
Beraldo, A. L.
Yokaichiya, F.
Turrillas, X.
Cardoso, L. P.
Abstract: Sugar and alcohol industries generate large amount of wastes that could produce ashes of great reactivity with pozzolan properties. The objective of this paper is to evaluate the pozzolanicity of Sugar Cane Straw Ashes (SCSA), thermal treated, at different curing times. Employing Synchrotron X-ray radiation for XRD measurements, scans from 10 degrees to 110 degrees (theta - 2 theta setup) allowed the quantification of several phases of the cement pasts through Rietveld analysis. The SCSA substitution of 20% (weight) in Ordinary Portland Cement (OPC) has improved the AFt (Ettringite) formation up to 47% for 90 days curing time. The Portlandite concentration analysis allowed concluding that this addition of SCSA in OPC has caused a delay in the cement setting time. Moreover, the behaviour of the C3S and Calcite contents in both OPC and OPC/SCSA samples were determined by refinement of the XRD pattern using the Rietveld method. (C) 2015 Elsevier Ltd. All rights reserved.
Sugar and alcohol industries generate large amount of wastes that could produce ashes of great reactivity with pozzolan properties. The objective of this paper is to evaluate the pozzolanicity of Sugar Cane Straw Ashes (SCSA), thermal treated, at different curing times. Employing Synchrotron X-ray radiation for XRD measurements, scans from 10 degrees to 110 degrees (theta - 2 theta setup) allowed the quantification of several phases of the cement pasts through Rietveld analysis. The SCSA substitution of 20% (weight) in Ordinary Portland Cement (OPC) has improved the AFt (Ettringite) formation up to 47% for 90 days curing time. The Portlandite concentration analysis allowed concluding that this addition of SCSA in OPC has caused a delay in the cement setting time. Moreover, the behaviour of the C3S and Calcite contents in both OPC and OPC/SCSA samples were determined by refinement of the XRD pattern using the Rietveld method.
Subject: Radiação sincrotrônica
Bagaço de cana
Indústria química
Country: Holanda
Editor: Elsevier
Citation: Assessing The Pozzolanic Activity Of Cements With Added Sugar Cane Straw Ash By Synchrotron X-ray Diffraction And Rietveld Analysis. Elsevier Sci Ltd, v. 98, p. 44-50 Nov-2015.
Rights: fechado
Identifier DOI: 10.1016/j.conbuildmat.2015.08.103
Address: https://www.sciencedirect.com/science/article/pii/S0950061815303184
Date Issue: 2015
Appears in Collections:FEAGRI - Artigos e Outros Documentos
IFGW - Artigos e Outros Documentos

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