Cementos portland ternarios elaborados con escoria granulada de alto horno molida y cenizas volantes de carbón: desempeño de resistencia a la compresión = Ternary portland cements made with ground granulated blast-furnace slag and coal fly ash: compressive strength performance
DOI:
https://doi.org/10.20868/ade.2021.4969Keywords:
Cementos ternarios, cenizas volantes de carbón, escoria de alto horno granulada, resistencia a la compresión, sinergia, Ternary cements, coal fly ash, granulated blast-furnace slag, compressive strength, synergyAbstract
Se informó que la producción mundial de cemento Portland fue de 4650 millones de toneladas en 2016. Dicha producción de cemento exige una cantidad significativa de recursos naturales y energía. Además, la producción de una tonelada de cemento Portland emite alrededor de 0,87 toneladas de dióxido de carbono. Este valor se reduciría significativamente al utilizar cementos ternarios elaborados con residuos industriales como escoria granulada de alto horno molida (GGBFS) y cenizas volantes de carbón (CFA). Además, se promueve la economía circular mediante el uso de residuos industriales (GGBFS y CFA) y se aumenta la durabilidad del hormigón en ambientes agresivos. Por el contrario, inducen un retraso en la ganancia de resistencia a la compresión como resultado de la reacción puzolánica. En este trabajo se ensayaron mezclas ternarias de cemento con proporciones GGBFS y CFA (25% y 40%) sobre morteros estándar. En consecuencia, se realizaron medidas de resistencia a la compresión a los 2, 7 y 28 días. Se discutieron las interacciones estadísticas entre GGBFS y CFA en los resultados de resistencia a la compresión de los morteros de cemento Portland ternarios.
Abstract
Global production of Portland cement was reported to be 4.65 billion tons in 2016. Such cement production demands a significant amount of natural resources and energy. Furthermore, the production of one tonne of Portland cement emits about 0.87 tons of carbon dioxide. This value would be reduced significantly by using ternary cements made with industrial wastes such as ground granulated blast-furnace slag (GGBFS) and coal fly ash (CFA). In addition, circular economy is promoted by using industrial wastes (GGBFS and CFA) and the concrete durability in aggressive environments is increased. By contrast, they induce a delay in the compressive strength gain as result of the pozzolanic reaction. In this paper, ternary cement mixes with GGBFS and CFA proportions (25% and 40%) were tested on standard mortars. Accordingly, compressive strength measures at 2, 7 and 28 days was performed. Statistical interactions between GGBFS and CFA on the compressive strength results of ternary Portland cement mortars were discussed.
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References
CEMBUREAU, 2017. Activity Report. https://cembureau.eu/media/1716/activity-report-2017.pdf
M.A. Sanjuán, C. Argiz, P. Mora, A. Zaragoza, Carbon Dioxide Uptake in the Roadmap 2050 of the Spanish Cement Industry, Energies. 13 (2020) 3452. https://doi.org/10.3390/en13133452no
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