Article (Scientific journals)
Physico-mechanical properties of phosphogypsum and black steel slag as aggregate for bentonite-lime based materials
Harrou, Achraf; Gharibi, Elkhadir; Nasri, Hicham et al.
2020In Materials Today: Proceedings
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Keywords :
Bentonite; Geotechnical; Electrical conductivity; Axial compression; Phosphogypse; Steel slag; Green material; Aggregate; Waste; Recycling; Lime
Abstract :
[en] This study aim to valorizing phosphogypsum (PG) and steel slag (Sc) in geotechnical applications by incorporating them in bentonite (B) stabilized by lime (L). Mineralogical (XRD), spectroscopic (IR-FTIR), geotechnical (Atterberg limits) analyzes were carried out on the raw material. Resistance to axial compression (UCS) was performed on cylindrical specimens prepared for mixtures B-L, B-L-PG, B-L-PG-Sc and cured for 3, 7, 15 and 28 days. The results obtained revealed that the mechanical strength increases with the addition of PG, and reaches its maximum value for a water content equal to 46%. Slag improves the strength of the B-L-PG mixture. The pH and the electrical conductivity of the solutions containing in porosity of the various mixtures decrease over time. The observed decrease is greatest for B-L-PG and B-L-PG-Sc mixtures due to pozzolanic reactions.
Disciplines :
Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others
Chemistry
Earth sciences & physical geography
Author, co-author :
Harrou, Achraf
Gharibi, Elkhadir
Nasri, Hicham
Fagel, Nathalie  ;  Université de Liège - ULiège > Département de géologie > Argiles, géochimie et environnements sédimentaires
El Ouahabi, Meriam  ;  Université de Liège - ULiège > Département de géologie
Language :
English
Title :
Physico-mechanical properties of phosphogypsum and black steel slag as aggregate for bentonite-lime based materials
Publication date :
09 July 2020
Journal title :
Materials Today: Proceedings
eISSN :
2214-7853
Publisher :
Elsevier, Netherlands
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 09 July 2020

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