Characterisation and use of biomass fly ash in cement-based materials.
作者： Rejini Rajamma , Richard J. Ball , Luís A.C. Tarelho , Geoff C. Allen , João A. Labrincha
DOI: 10.1016/J.JHAZMAT.2009.07.109
关键词:
摘要: This paper presents results about the characterisation of biomass fly ashes sourced from a thermal power plant and co-generation located in Portugal, study new cement formulations incorporated with ashes. The includes comparative analysis phase formation, setting mechanical behaviour cement-fly ash based on these Techniques such as X-ray diffraction (XRD), fluorescence spectroscopy (XRF), gravimetric differential (TG/DTA), photoelectron (XPS), scanning electron microscopy (SEM) environmental (ESEM) were used to determine structure composition formulations. Fly F1 contained levels SiO(2), Al(2)O(3) Fe(2)O(3) indicating possibility exhibiting pozzolanic properties. F2 higher quantity CaO ( approximately 25%). are similar class C according EN 450 basis chemical composition. hydration rate formation greatly dependant samples' alkali content water binder (w/b) ratio. In mortar 10% basic strength was maintained, however, when 20% added around 75% reference mortar. significant chloride sulphate it is suggested that performance ash-cement binders could be improved by removal or control species.
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