Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6715727 | Construction and Building Materials | 2018 | 10 Pages |
Abstract
This study used fly ash (FA) with a high amount of unburned content (21%) to produce simple (Geo FA) and binary (Geo FA/granulated blast furnace slag [GBFS]) geopolymeric concretes. The effect on the mechanical strength of the SiO2/Al2O3 and Na2O/SiO2 molar ratios and the percentage of GBFS (% GBFS) added to the blend were determined. Using the optimal parameters of alkaline activation, concretes with strengths up to 48â¯MPa were obtained after 28â¯days of curing at room temperature (25â¯Â°C). The results of this study are complemented by the microstructural characterisation of the geopolymeric pastes using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM) techniques.
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Authors
William Valencia-Saavedra, Ruby MejÃa de Gutiérrez, Marisol Gordillo,