【摘 要】
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This paper presents a comprehensive approach to study calcareous fly ashes in composite cements.Fly ashes are difficult to characterize due to their complex
【机 构】
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Laboratory of Construction Materials, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne,Swit
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
This paper presents a comprehensive approach to study calcareous fly ashes in composite cements.Fly ashes are difficult to characterize due to their complex microstructure and the presence of multiple glass phases.A new approach to treat Scanning electron microscopy EDS data was used to quantitatively characterize different glass populations in raw fly ashes and to follow their reaction in hydrating composite cements.We propose to subdivide the glasses in four main populations: silicate, Ca-silicate, Al-silicate, Ca-Al-silicate.The amounts,compositions and degree of consumption of these populations present in two fly ashes were correlated with the hydrate assemblage of the hydrating Portland-fly ash pastes measured by XRD-Rietveld and the resulting compressive strength of corresponding mortars.
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