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

Author

Listed:
  • María Isabel Romero-Hermida

    (Department Física de la Materia Condensada, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain)

  • Antonio María Borrero-López

    (Pro2TecS—Chemical Process and Product Technology Centre, Department of Chemical Engineering, ETSI, Campus de El Carmen s/n, University of Huelva, 21071 Huelva, Spain)

  • Vicente Flores-Alés

    (Department Construcciones Arquitectónicas II, Universidad de Sevilla, Avda. Reina Mercedes n°4, 41012 Sevilla, Spain)

  • Francisco Javier Alejandre

    (Department Construcciones Arquitectónicas II, Universidad de Sevilla, Avda. Reina Mercedes n°4, 41012 Sevilla, Spain)

  • José María Franco

    (Pro2TecS—Chemical Process and Product Technology Centre, Department of Chemical Engineering, ETSI, Campus de El Carmen s/n, University of Huelva, 21071 Huelva, Spain)

  • Alberto Santos

    (Department de Ciencias de la Tierra, Universidad de Cádiz, Campus Universitario de Pto, Real, Puerto Real, 11510 Cádiz, Spain)

  • Luis Esquivias

    (Department Física de la Materia Condensada, Universidad de Sevilla, Avda. Reina Mercedes s/n, 41012 Sevilla, Spain)

Abstract

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.

Suggested Citation

  • María Isabel Romero-Hermida & Antonio María Borrero-López & Vicente Flores-Alés & Francisco Javier Alejandre & José María Franco & Alberto Santos & Luis Esquivias, 2021. "Characterization and Analysis of the Carbonation Process of a Lime Mortar Obtained from Phosphogypsum Waste," IJERPH, MDPI, vol. 18(12), pages 1-20, June.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:12:p:6664-:d:578951
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    References listed on IDEAS

    as
    1. M. I. Romero-Hermida & V. Flores-Alés & S. J. Hurtado-Bermúdez & A. Santos & L. Esquivias, 2020. "Environmental Impact of Phosphogypsum-Derived Building Materials," IJERPH, MDPI, vol. 17(12), pages 1-17, June.
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    Cited by:

    1. Baizhi Wu & Haibin Wang & Chunlei Li & Yuan Gong & Yi Wang, 2023. "Progress in the Preparation of Calcium Carbonate by Indirect Mineralization of Industrial By-Product Gypsum," Sustainability, MDPI, vol. 15(12), pages 1-16, June.

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