Durability of Mortar Containing Coal Bottom Ash as a Partial Cementitious Resource

Nafissatou Savadogo, Adamah Messan, Kinda Hannawi, William Prince Agbodjan and François Tsobnang
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Nafissatou Savadogo: Institut International d’Ingénierie de l’Eau et de l’Environnement (2iE), Laboratoire Eco-Matériaux et Habitat Durable (LEMHaD), Rue de la Science, Ouagadougou 01, Burkina Faso
Adamah Messan: Institut International d’Ingénierie de l’Eau et de l’Environnement (2iE), Laboratoire Eco-Matériaux et Habitat Durable (LEMHaD), Rue de la Science, Ouagadougou 01, Burkina Faso
Kinda Hannawi: Institut National des Sciences Appliquées de Rennes (INSA), Laboratoire Génie Civil et Génie Mécanique (LGCGM), 35000 Rennes, France.
William Prince Agbodjan: Institut National des Sciences Appliquées de Rennes (INSA), Laboratoire Génie Civil et Génie Mécanique (LGCGM), 35000 Rennes, France.
François Tsobnang: Institut International d’Ingénierie de l’Eau et de l’Environnement (2iE), Laboratoire Eco-Matériaux et Habitat Durable (LEMHaD), Rue de la Science, Ouagadougou 01, Burkina Faso

Sustainability, 2020, vol. 12, issue 19, 1-17

Abstract: This research work focuses on the study of the durability of composite cements based on coal bottom ash powder produced by SONICHAR in Niger. After a physicochemical and environmental characterization of the coal bottom ash powder, mortar test specimens were made. In these specimens, 10%, 15% and 20% of cement were replaced by identical mass percentages of coal bottom ash powder. Durability studies focused on the determination of the chloride ions apparent diffusion coefficient, the measurement of the depth of carbonation and the accelerated ammonium nitrate leaching. The influence of carbonation and leaching were examined using the following parameters: pore distribution, gas permeability, porosity accessible to water, capillary absorption and electrical resistivity. The results show that the incorporation of coal bottom ash powder into CEM I leads to an increase in the depth of carbonation. This increase is more significant when the substitution rate exceeds 10%. In the leaching test, the partial substitution of coal bottom ash powder in CEM I up to 20% does not significantly affect the durability parameters of the composites compared to the control mortar. Diffusion test shows that for mortars containing less than 15% substitution, there is no significant influence on the chloride diffusion coefficient. A slight decrease is observed for mortar containing 20% substitution.

Keywords: coal bottom ash powder; chloride ions diffusion; resistivity; carbonation; ammonium nitrate leaching; durability (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
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Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:12:y:2020:i:19:p:8089-:d:422276

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