| Title |
Valorization of phosphogypsum waste through acid geopolymer technology: synthesis, characterization, and environmental assessment |
| ID_Doc |
30059 |
| Authors |
Majdoubi, H; Makhlouf, R; Haddaji, Y; Nadi, M; Mansouri, S; Semllal, N; Oumam, M; Manoun, B; Alami, J; Hannache, H; Tamraoui, Y |
| Title |
Valorization of phosphogypsum waste through acid geopolymer technology: synthesis, characterization, and environmental assessment |
| Year |
2023 |
| Published |
|
| DOI |
10.1016/j.conbuildmat.2023.130710 |
| Abstract |
Phosphogypsum (PG) constitutes the principal by-product of the phosphate industry which largely restricts its wide development. The incorporation of PG as a reinforcement agent into geopolymer cement, can play however a significant role to enhance their mechanical and microstructural properties and to develop a sustainable geopolymer-PG based circular economy. In this study, geopolymer reinforced PG composites were prepared at different PG content according to PG/MK ratio in the range of 0-1. The mechanical properties of the composites were tested under compressive and flexural strength. The results show a significant enhancement of compressive and flexural strength from 40.14 MPa to 48.43 MPa and 5.13 MPa to 9.1 MPa respectively with addition of 20.6 % and 77.3 % compared standalone geopolymer. This improvement was linked systematically with crack selfhealing mechanism due to PG rod-like morphology and its high adhesion to the geopolymer matrix. The heavy metals leaching test show that most of the developed acidic geopolymer- PG composites have a leaching value lower than the international recommendations. Thus, geopolymer- PG composites can constitute an efficient and sustainable alternative to conventional building materials and can be extended to divers' industrial applications. |
| Author Keywords |
By-products valorization; Eco-friendly materials; Heavy metals; Geopolymers; Phosphogypsum; Phosphoric acid activation |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000948125900001 |
| WoS Category |
Construction & Building Technology; Engineering, Civil; Materials Science, Multidisciplinary |
| Research Area |
Construction & Building Technology; Engineering; Materials Science |
| PDF |
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