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Élaboration d’une pouzzolane de synthèse à partir des sédiments de barrage

Abstract : Precipitations, in the showers, cause the fast erosion of the slopes. The fine solid particles which are transported by the rivers arrive up to the levels of the stoppings where they settle. Thus, after continuous downpours the dam silts up ; which decreases its lifespan. One of the solutions adopted at summer was unsilting, but in front of the great quantity of product rejected simply downstream from the stopping, the problems of environment appeared. The use of this recovered mud in the manufacture of pozzolanic cement, contributes in the resolution of these problems. The study shows that the addition of 30 % of calcined mud with cement (CPA) makes it possible to obtain pozzolanic cement. Indeed, the quantity of added artificial pozzolana creates a chemical reaction with the lime released during the hydration of cement to form a calcium silicate hydrate probably the tobermorite and gehlenite.
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https://hal.archives-ouvertes.fr/hal-03170757
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Submitted on : Thursday, March 18, 2021 - 8:30:20 AM
Last modification on : Friday, March 19, 2021 - 5:50:04 PM
Long-term archiving on: : Monday, June 21, 2021 - 9:02:38 AM

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Lakhdar Benamara, Kamal Ouhba, André Hamwi. Élaboration d’une pouzzolane de synthèse à partir des sédiments de barrage. Environnement, Ingénierie & Développement, Episciences, 2013, N°65 - Novembre 2013, pp.40-44. ⟨10.4267/dechets-sciences-techniques.1144⟩. ⟨hal-03170757⟩

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