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Comparative Study on Geopolymer Binders Based on Two Alkaline Solutions (NaOH and KOH)

Journal of Minerals and Materials Characterization and Engineering 2020年第6期8卷 407-420页

作者： Seick Omar Sore Adamah Messan Elodie Prud’Homme Gilles Escadeillas françois tsobnang Université Nazi BONI (UNB) Bobo-Dioulasso Burkina Faso Institut International d’ingénierie de l’Eau et de l’Environnement (2iE) Laboratoire Eco-Matériaux et Habitats Durables (LEMHaD) Rue de la Science Ouagadougou Burkina Faso Université de Lyon Matériaux: Ingénierie et Science (MATEIS) INSA Lyon Villeurbanne France Université de Toulouse (UPS INSA) LMDC (Laboratoire Matériaux et Durabilité des Constructions) Toulouse France

This study specifically investigated the influence of the composition of aluminosilicate material i.e. the substitution of metakaolin by rice husk ash and the nature of alkaline activators (Na+/K+) on mineralogical, structural, physical and mechanical properties of geopolymer binders. This influence was evaluated based on X-ray diffraction (XRD), Fourier Transform InfraRed spectroscopy (FTIR) and Scanning Electron Microscope (SEM analyses, apparent density, water accessible porosity, compressive strength and thermal properties. Two types of geopolymer binder were synthesized according to the type of alkali activator used, the NaOH-based geopolymer and the KOH-based geopolymer. The results of characterization performed after 14 days of curing of geopolymer samples showed that the activation of the aluminosilicate powder using alkaline solution led to change in their microstructure. The highest compressive strength was obtained with the NaOH-based geopolymer.

关键词： Geopolymer NaOH KOH Metakaolin Rice Husk Ash Compressive Strength

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Durability of Lightweight Concrete Using Oil Palm Shell as Aggregates

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Open Journal of Civil Engineering 2021年第1期11卷 1-13页

作者： Yasmine Binta Traore Adamah Messan Kinda Hannawi Jean Gerard William Prince françois tsobnang Université de Fada N’Gourma/Ecole Supérieure d’Ingénierie (ESI) Fada N’Gourma Burkina Faso Institut International d’Ingénierie de l’Eau et de l’Environnement (2iE) Laboratoire Eco-Matériaux et Habitats Durables (LEMHaD) Ouagadougou Burkina Faso Institut National des Sciences Appliquées de Rennes (INSA-Rennes) Laboratoire de Génie Civil et de Génie Mécanique (LGCGM) Rennes France Centre de Coopération International en Recherche Agronomique pour le Développement (CIRAD) Unité de recherche Biomass Wood Energy and Bioproducts (BioWooEB) Montpellier France

Oil Palm Shell (OPS) concrete can be used in different fields of construction. To determine more accurately the fields of application, it is important to know and understand the behaviour of OPS concrete over the long term and when it is in aggressive environments. This paper presents the results of studies conducted on the durability of OPS concrete. Water absorption capacity, electrical resistivity and apparent diffusion of chloride ions have been measured on different concrete samples. In addition, the behaviour of OPS concretes to carbonation was studied in an environment rich in carbon dioxide. Results show that OPS concrete has an absorptivity of 0.97 kg/m2·h1/2, an electrical resistivity of 64.37 Ω·m and an apparent diffusion coefficient of chloride ions of 3.84

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Experimental Investigations on the Physical and Mechanical Properties of a Lightweight Concrete Using Oil Palm Shell as Coarse Aggregate

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材料科学与工程（中英文A版） 2017年第3期7卷 157-168页

作者： Yasmine Binta TRAORE Adamah MESSAN Kinda HANNAWI Jean GERARD William PRINCE-AGBODJAN francois tsobnang lnstitut International d'Ingenierie de l'Eau et de l'Environnement (2iE) Laboratoire Eco-Materiaux de Construction (LEMC) Rue de la Science 01 BP 594 Ouagadougou 01 Burkina Faso INSA-Rennes Laboratoire de Gdnie Civil et Genie mecanique (LGCGM) 20 Avenue des Buttes de Coesmes CS 70839 35708 Rennes Cedex 7 France Centre de cooperation International en Recherche Agronomique pour le developpement (CIRAD) UPR Biomasse Energie TA B-42/16 73 rue Jean Francois Breton 34398 Montpellier Cedex 5 France

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Mechanical Study of the Utilization of Niger Coal Bottom Ash as an Additive in Cement Production

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材料科学与工程（中英文A版） 2015年第1期5卷 87-92页

作者： Nafissatou Savadogo Adamah Messan francois tsobnang Prince William Agbodjan International Institute for Water and Environmental Engineering Laboratory of Eco-Materials for Construction Ouagadougou 01 BP 594 Burkina Faso Institut National des Sciences Appliquees Laboratoire Genie Civil et Genie Mecanique Rennes 35000 France

CBA (coal bottom ash) is an industrial waste generated by coal fired thermal power plant. In this work, we investigate the utilization as an additive material in composite cement of CBA resulting from the firing of the coal extracted in Tefereyre mine (TCBA) in a thermal power plant in Niger. Our investigations are carried out by using compressive mechanical tests on 40 × 40 × 160 mm3 mortar specimens. These mortar specimens are made with a partial substitution of the cement by TCBA at levels of 0%, 5%, 10%, 15%, 20% and 25% by mass. The tests were performed on the specimens at 7, 14, 28, 45 and 56 days of age. The results were used to evaluate the pozzolanic activity index as the ratio of the compressive strength of mortar containing 25% of coal bottom ash on that of the control mortar containing 100% of cement, according to ASTM C618. From these data, the maximum rate of TCBA addition in Portland cement was derived. It was found that TCBA has a pozzolanic activity index of about 71% at 28 days and displays a maximum substitution rate of 15% in Portland cement. These results strongly support the development of composite cement using TCBA.

关键词：燃煤火电厂水泥生产添加剂尼日尔底灰波特兰水泥砂浆试件机械

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