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Article

Characterization and Analysis of the Carbonation Process of a Lime Mortar Obtained from Phosphogypsum Waste

1
Department Física de la Materia Condensada, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain
2
Pro2TecS—Chemical Process and Product Technology Centre, Department of Chemical Engineering, ETSI, Campus de El Carmen s/n, University of Huelva, 21071 Huelva, Spain
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Department Construcciones Arquitectónicas II, Universidad de Sevilla, Avda. Reina Mercedes n°4, 41012 Sevilla, Spain
4
Department de Ciencias de la Tierra, Universidad de Cádiz, Campus Universitario de Pto, Real, Puerto Real, 11510 Cádiz, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Paul B. Tchounwou
Int. J. Environ. Res. Public Health 2021, 18(12), 6664; https://doi.org/10.3390/ijerph18126664
Received: 3 June 2021 / Revised: 17 June 2021 / Accepted: 19 June 2021 / Published: 21 June 2021
(This article belongs to the Special Issue Environmental Waste Recycling)
This work addresses the reuse of waste products as a raw material for lime putties, which are one of the components of mortar. 1:3 Lime/sand mortars very similar to conventional construction mortars were prepared using a lime putty obtained from the treatment of phosphogypsum with sodium hydroxide. The physical, rheological and mechanical properties of this phosphogypsum-derived mortar have been studied, as well as the mineralogical composition, microstructure by scanning electron microscope (SEM) and curing process by monitoring carbonation and ultrasonic propagation velocity. Considering the negative influence of sulphates on the hardened material, the behaviour of the material after sulphates precipitation by adding barium sulphate was additionally tested. Carbonation progressed from the outside to the inside of the specimen through the porous system by Liesegang rings patterns for mortars with soluble sulphates, while the carbonation with precipitated sulphates was controlled by diffusion-precipitation. Overall, the negative influence of low-sulphate contents on the mechanical properties of mortars was verified. It must be highlighted the importance of their precipitation to obtain adequate performance. View Full-Text
Keywords: lime putty; mortar; carbonation; rheology; ultrasound lime putty; mortar; carbonation; rheology; ultrasound
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MDPI and ACS Style

Romero-Hermida, M.I.; Borrero-López, A.M.; Flores-Alés, V.; Alejandre, F.J.; Franco, J.M.; Santos, A.; Esquivias, L. Characterization and Analysis of the Carbonation Process of a Lime Mortar Obtained from Phosphogypsum Waste. Int. J. Environ. Res. Public Health 2021, 18, 6664. https://doi.org/10.3390/ijerph18126664

AMA Style

Romero-Hermida MI, Borrero-López AM, Flores-Alés V, Alejandre FJ, Franco JM, Santos A, Esquivias L. Characterization and Analysis of the Carbonation Process of a Lime Mortar Obtained from Phosphogypsum Waste. International Journal of Environmental Research and Public Health. 2021; 18(12):6664. https://doi.org/10.3390/ijerph18126664

Chicago/Turabian Style

Romero-Hermida, María I., Antonio M. Borrero-López, Vicente Flores-Alés, Francisco J. Alejandre, José M. Franco, Alberto Santos, and Luis Esquivias. 2021. "Characterization and Analysis of the Carbonation Process of a Lime Mortar Obtained from Phosphogypsum Waste" International Journal of Environmental Research and Public Health 18, no. 12: 6664. https://doi.org/10.3390/ijerph18126664

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