Journal of Materials and Engineering Structures
Volume 2, Numéro 4, Pages 213-223
2015-12-30
Durability Of Composite Cement With Tefereyre (niger) Coal Bottom Ash: Capillary Absorption, Porosity To Water And Acid Attack
Auteurs : Savadogo Nafissatou . Messan Adamah . Hannawi Kinda . Tsobnang François . Agbodjan William Prince .
Résumé
In this study, we evaluate the durability characteristics of composite cement with coal bottom ash produced by SONICHAR (Société Nigérienne de Charbon). The study firstly consists in the determination of the pozzolanic activity index of the coal bottom ash and the optimum rate to use in the composite cement. Thereafter an evaluation of capillary absorption, porosity accessible to water and resistance to sulfuric and nitric acid attack of mortar prepared made with the composite cement is performed. The results showed that the coal bottom ash powder obtained by grinding can partially substitute Portland cement at a rate of 15% enable to develop a CEM II A composite cement according to EN 197-1 Standard.
Mots clés
Coal bottom ash; Composite cement; Durability; Water absorption by capillarity
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