Journal of Materials and Engineering Structures
Volume 6, Numéro 1, Pages 39-51
2019-03-30
Elaboration Of Geopolymer Cement Based On Dredged Sediment
Authors : Mostefa Fouzia . Bouhamou Nasr-eddine . Aggoune Salima . Mesbah Habib .
Abstract
This work aims to study the feasibility of making a geopolymer cement based on dredged sediments, from the Fergoug dam (Algeria). Sedimentary clays were characterized before and after calcination by X-ray diffraction, thermogravimetric analysis (ATG / ATD), spectroscopy (FTIR) and XRF analysis. The reactivity of the calcined products was measured using isothermal calorimetric analysis (DSC) on pastes prepared by mixing an alkaline solution of sodium hydroxide (NaOH) 8 M in an amount allowing to have a Na / Al ratio close to 1. Also, cubic mortar samples were prepared with a ratio of liquid to binder not: 0.8. The results obtained allowed to optimize the calcination time of 5 hours for a better reactivity of these sediments, and a concentration of 8 M of sodium hydroxide and more suitable to have the best compressive strength. Our study offer great prospects for upgrading the sediments used as geopolymer cements in mortars
Keywords
Sediment; Geopolymer Cement; Paste; Mortar
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