Search Results - "Antoine, Elimbi"

Mechanical properties and durability of volcanic ash based geopolymer mortars by Yankwa Djobo, Jean Noël, Elimbi, Antoine, Kouamo Tchakouté, Hervé, Kumar, Sanjay

“…•Volcanic ash based geopolymer mortars perform well under wet-dry cycles.•Samples cured at 27°C have better acid resistance than those cured at 80°C.•The…”
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Role of washing process in the improvement of surface properties of porous geopolymers by Bouna, Lahcen, Ettahiri, Youssef, Elimbi, Antoine, Benlhachemi, Abdeljalil, Cyr, Martin

“…This study investigates the importance of washing process in the quantitative improvement of both porosity and specific surface area of geopolymers. To this…”
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Dissolution of Volcanic Ash in Alkaline Environment for Cold Consolidation of Inorganic Binders by Dal Poggetto, Giovanni, Douwe, Philippe, Stroscio, Antonio, Kamseu, Elie, Lancellotti, Isabella, Elimbi, Antoine, Leonelli, Cristina

“…A systematic study on the dissolution in concentrated alkali of two volcanic ashes from Cameroon, denoted as DAR and VN, is presented here. One volcanic ash,…”
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Design of low cost semi-crystalline calcium silicate from biomass for the improvement of the mechanical and microstructural properties of metakaolin-based geopolymer cements by Tchinda Mabah, Dominique E., Tchakouté, Hervé K., Rüscher, Claus H., Kamseu, Elie, Elimbi, Antoine, Leonelli, Cristina

“…The main objective of this work is to use low-value SiO2 and CaO-rich wastes like rice husk ash and chicken eggshell powders, respectively for producing…”
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Pozzolanic activity of kaolins containing aluminum hydroxide by Tchamo Leussa, Claudia Charlotte, Libessart, Laurent, Djelal, Chafika, Njiomou Djangang, Chantale, Elimbi, Antoine

“…The addition of 10 wt% aluminum hydroxide to two crude kaolinitic clays, a commercial and a natural freshly mined one, has enhanced their pozzolanic activity,…”
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Phase and dimensional stability of volcanic ash-based phosphate inorganic polymers at elevated temperatures by Djobo, Jean Noël Yankwa, Elimbi, Antoine, Stephan, Dietmar

“…Phosphate geopolymers are part of chemically bonded phosphate cements obtained from an aluminosilicate and phosphate solution. Their structure consisting of…”
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Amorphous phase of volcanic ash and microstructure of cement product obtained from phosphoric acid activation by Djon Li Ndjock, Benjamin Igor, Baenla, Jean, Mbah, Jean Baptiste Bike, Elimbi, Antoine, Cyr, Martin

“…Alkaline activation of volcanic ash using Na 2 SiO 3 as activator showed its limits because of their low reactivity, nevertheless, phosphoric acid activation…”
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New Low-Cost Ceramic Microfiltration Membranes for Bacteria Removal by Mountoumnjou, Olivier, Szymczyk, Anthony, Lyonga Mbambyah, Emilia Enjema, Njoya, Dayirou, Elimbi, Antoine

“…Safe water provision in low-income countries is constrained by limited financial resources, and the problem is worsened during natural disasters. Thus, there…”
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Method of choosing soils as CEB or pavement layers based on geological and environmental information and mode of treatment by Ilalie, Manefouet Kentsa Bertille, Véronique, Kamgang Kabeyene Beyala, Valentine, Katte Yato, Armand, Wouatong, Paul, Nzenti Jean, Désiré, Ndjigui Paul, Antoine, Elimbi

“…During research on the geological, mineralogical, mechanical and geotechnical nature of thick layers of soils developed on the rocks of the lower zone of the…”
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Adsorption mechanisms of pigments and free fatty acids in the discoloration of shea butter and palm oil by an acid-activated Cameroonian smectite by Jean Baptiste, Bike Mbah, Daniele, Benessoubo Kada, Marie Charlène, Eko, Larrissa Canuala, Tekoumbo Tedontsa, Antoine, Elimbi, Richard, Kamga

“…Discoloration mechanism of shea butter and palm oil was studied by the adsorption of pigments and free fatty acids onto a Cameroonian clay. Adsorbent…”
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Effect of various amounts of aluminium oxy‐hydroxide coupled with thermal treatment on the performance of alkali‐activated metakaolin and volcanic scoria by Tiffo, Emmanuel, Belibi, Placide Désiré Belibi, Mbah, Jean Batiste Bike, Thamer, Alomayri, Pougnong, Thierry Ebenizer, Baenla, Jean, Elimbi, Antoine

“…This study aims to improve the stability of alkali-activated products, such as powdered volcanic scoria and metakaolin, by thermal treatment in addition to…”
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Reactivity of calcium dialuminate (CaAl4O7) refractory cement with lithium carbonate (Li2CO3) admixture by Tchamba, Arlin Bruno, Mbessa, Michel, Langollo Yannick, Tchedele, Waida, Sandra, Elimbi, Antoine, Melo, Uphie Chinje, Bier, Thomas A.

“…The reactivity of calcium dialuminate CaAl 4 O 7 refractory cement containing little amount of gehlenite Ca 2 Al 2 SiO 7 , belite Ca 2 SiO 4 , calcium aluminum…”
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Volcanic ash-based geopolymer cements/concretes: the current state of the art and perspectives by Djobo, Jean Noël Yankwa, Elimbi, Antoine, Tchakouté, Hervé Kouamo, Kumar, Sanjay

“…The progress achieved with the use of volcanic ash for geopolymer synthesis has been critically reviewed in this paper. This consists of an overview of…”
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Effects of chemical composition of amorphous phase on the reactivity of phosphoric acid activation of volcanic ashes by Pougnong, Thierry Ebenizer, Belibi, Placide Desiré Belibi, Baenla, Jean, Thamer, Alomayri, Tiffo, Emmanuel, Elimbi, Antoine

“…•Volcanic ashes with differences in mass percentages (MP) of oxides in chemical compositions of amorphous phase (AP) were activated by phosphoric acid (PA).•AP…”
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Reactivity of volcanic ash in alkaline medium, microstructural and strength characteristics of resulting geopolymers under different synthesis conditions by Djobo, Jean Noël Yankwa, Elimbi, Antoine, Tchakouté, Hervé Kouamo, Kumar, Sanjay

“…The present paper investigated the reactivity of volcanic ash in alkaline medium and reported the effect of synthesis conditions on microstructural and…”
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Rational utilization of volcanic ashes based on factors affecting their alkaline activation by Djon Li Ndjock, B.I., Elimbi, Antoine, Cyr, Martin

“…The present study evaluates the criteria that affect the characteristics of both volcanic ashes and their alkaline activated products, hence their rational…”
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Setting and hardening behavior of volcanic ash phosphate cement by Djobo, Jean Noël Yankwa, Stephan, Dietmar, Elimbi, Antoine

“…This study aims at determining the setting and hardening behavior of volcanic ash-phosphate cement (VAPC) at room temperature using various concentrations of…”
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Gel Composition and Strength Properties of Alkali-Activated Oyster Shell-Volcanic Ash: Effect of Synthesis Conditions by Djobo, Jean Noël Yankwa, Tchakouté, Hervé Kouamo, Ranjbar, Navid, Elimbi, Antoine, Tchadjié, Leonel Noumbissié, Njopwouo, Daniel

“…The gel composition and mechanical properties of alkali‐activated oyster shell‐volcanic ash were investigated at different NaOH concentrations (8, 12, and 15M)…”
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Physical and mechanical properties of unheated and heated kaolin based-geopolymers with partial replacement of aluminium hydroxide by Tiffo, Emmanuel, Bike Mbah, Jean Batiste, Belibi Belibi, Placide Désiré, Yankwa Djobo, Jean Noel, Elimbi, Antoine

“…Amorphous aluminium hydroxide and aluminium oxy-hydroxide were used as replacements in the synthesis of kaolin based-geopolymers. Physical and mechanical…”
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Alkaline and Acid Activations of Calcined Laterites: A Comparative Study by Tantono, Solomon Ndisho, Belibi Belibi, Placide Desire, Baenla, Jean, Elimbi, Antoine

“…In order to improve the characteristics of natural laterites for earth building issues, activation of three calcined laterites was carried out in both alkaline…”
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