Assessing the pozzolanic activity of cements with added sugar cane straw ash by synchrotron X-ray diffraction and Rietveld analysis
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2015
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Construction and Building Materials
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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 to 110 (h 2h 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.
Como referenciar
CALLIGARIS, GUILHERME A.; FRANCO, MARGARETH K.K.D.; ALDRIGE, LAURENCE P.; RODRIGUES, MICHELLE S.; BERALDO, ANTONIO L.; YOKAICHIYA, FABIANO; TURRILLAS, XAVIER; CARDOSO, LISANDRO P. Assessing the pozzolanic activity of cements with added sugar cane straw ash by synchrotron X-ray diffraction and Rietveld analysis. Construction and Building Materials, v. 98, p. 44-50, 2015. DOI: 10.1016/j.conbuildmat.2015.08.103. Disponível em: http://repositorio.ipen.br/handle/123456789/25324. Acesso em: 13 Feb 2025.
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