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Article

The Development of a New Phosphogypsum-Based Construction Material: A Study of the Physicochemical, Mechanical and Thermal Characteristics

by
Hela Garbaya
1,2,
Abderraouf Jraba
1,2,
Mohamed Amine Khadimallah
3,* and
Elimame Elaloui
1
1
Laboratory of Materials Applications in Environment, Water and Energy, Faculty of Sciences, University of Gafsa, Gafsa 6029, Tunisia
2
Faculty of Sciences of Gabes, University of Gabes, Gabes 6029, Tunisia
3
Civil Engineering Department, College of Engineering, Prince Sattam Bin Abdulaziz University, Al-Kharj 16273, Saudi Arabia
*
Author to whom correspondence should be addressed.
Materials 2021, 14(23), 7369; https://doi.org/10.3390/ma14237369
Submission received: 8 October 2021 / Revised: 23 November 2021 / Accepted: 29 November 2021 / Published: 1 December 2021
(This article belongs to the Special Issue Mechanical Behavior of Concrete Materials and Structures: Experimental Evidence and Analytical Models)
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Abstract

Phosphogypsum (PG) is a waste (or by-product) of the production of phosphoric acid, a basic constituent in the manufacturing of modern fertilizers. The annual production of phosphogypsum in Tunisia is currently estimated to be 10 million tons. Its storage in slag in close proximity to production plants generates pollution problems; however, valorization may be a solution. The present paper proposes a simple process for the valorization of this by-product into a construction material. Several physicochemical characterizations are used to prove the characteristics of samples. The chemical composition shows that PG is a gypsum compound with several impurities. The morphological analyses show that the powder materials are mesoporous with a lower specific area. The structural characterizations show that these solids play the role of a water pump as the degree of hydration changes from 2 to 0 and vice versa, depending on the temperature. Mechanical and thermal analyses show that the prepared formulation is brittle and insulating, which presents opportunities for it to be used as a decoration material.
Keywords: phosphogypsum; valorization; construction material; mechanical and thermal properties phosphogypsum; valorization; construction material; mechanical and thermal properties

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MDPI and ACS Style

Garbaya, H.; Jraba, A.; Khadimallah, M.A.; Elaloui, E. The Development of a New Phosphogypsum-Based Construction Material: A Study of the Physicochemical, Mechanical and Thermal Characteristics. Materials 2021, 14, 7369. https://doi.org/10.3390/ma14237369

AMA Style

Garbaya H, Jraba A, Khadimallah MA, Elaloui E. The Development of a New Phosphogypsum-Based Construction Material: A Study of the Physicochemical, Mechanical and Thermal Characteristics. Materials. 2021; 14(23):7369. https://doi.org/10.3390/ma14237369

Chicago/Turabian Style

Garbaya, Hela, Abderraouf Jraba, Mohamed Amine Khadimallah, and Elimame Elaloui. 2021. "The Development of a New Phosphogypsum-Based Construction Material: A Study of the Physicochemical, Mechanical and Thermal Characteristics" Materials 14, no. 23: 7369. https://doi.org/10.3390/ma14237369

APA Style

Garbaya, H., Jraba, A., Khadimallah, M. A., & Elaloui, E. (2021). The Development of a New Phosphogypsum-Based Construction Material: A Study of the Physicochemical, Mechanical and Thermal Characteristics. Materials, 14(23), 7369. https://doi.org/10.3390/ma14237369

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