Academic Journal
Synthesis of clay geopolymers using olive pomace fly ash as an alternative activator. Influence of the additional commercial alkaline activator used
| العنوان: | Synthesis of clay geopolymers using olive pomace fly ash as an alternative activator. Influence of the additional commercial alkaline activator used |
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| المؤلفون: | Gomez-Casero, M. A., Moral-Moral, F. J., Perez-Villarejo, L., Sanchez-Soto, P. J., Eliche-Quesada, D. |
| المساهمون: | Gomez-Casero, M. A. Univ Jaen, Dept Chem Environm & Mat Engn, Higher Polytech Sch Jaen, Campus Las Lagunillas S-N, Jaen 23071, Spain, Moral-Moral, F. J. Univ Jaen, Dept Chem Environm & Mat Engn, Higher Polytech Sch Jaen, Campus Las Lagunillas S-N, Jaen 23071, Spain, Eliche-Quesada, D. Univ Jaen, Dept Chem Environm & Mat Engn, Higher Polytech Sch Jaen, Campus Las Lagunillas S-N, Jaen 23071, Spain, Perez-Villarejo, L. Univ Jaen, Dept Chem Environm & Mat Engn, Higher Polytech Sch Linares, Campus Cient Tecnol,Cinturon Sur S-N, Linares 23700, Jaen, Spain, Perez-Villarejo, L. Univ Jaen, Ctr Adv Studies Earth Sci Energy & Environm CEACT, Campus Las Lagunillas S-N, Jaen 23071, Spain, Eliche-Quesada, D. Univ Jaen, Ctr Adv Studies Earth Sci Energy & Environm CEACT, Campus Las Lagunillas S-N, Jaen 23071, Spain, Sanchez-Soto, P. J. Univ Seville, Inst Mat Sci Sevilla ICMS, Joint Ctr Spanish Natl Res Council CSIC, Seville 41092, Spain, project Development and characterization of new geopolymeric composites based on waste from the olive industry, MINECO |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2021 |
| المجموعة: | Sistema Sanitario Público de Andalucía (SSPA): Repositorio |
| مصطلحات موضوعية: | Geopolymers, Clay, Olive pomace fly ash, Valorization, Alkaline activator, Sustainability, Bottom ash, Metakaolin, Strength, Sodium, Cement, Microstructure, Binders |
| الوصف: | In this research, the use of olive pomace fly ash (OPFA) as an alkaline source for the activation of calcined clays (CC) from Bailen (Jaen, Spain) was studied. The optimal composition was obtained for 70 wt % CC and 30 wt % OPFA. The physical, mechanical and thermal properties of control geopolymers that use water as a liquid medium have been studied and compared with geopolymers that use additional activating solutions as sodium or potassium hydroxide solutions (8 M), or a mixture of alkaline hydroxide and alkaline silicate solution (NaOH-Na2SiO3 or KOH-K2SiO3). The results showed that OPFA can be used as an alkaline activator, showing mechanical properties slightly lower than those obtained when additional alkaline hydroxide activating solutions were used. The best compressive strength was obtained for geopolymers that use alkaline silicates as an activating solution. However, the best thermal insulation properties were obtained for control geopolymers. The microstructural characteristics of the geopolymers were evaluated by means of X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and Scanning Electron Microscopy (SEM-EDS) that corroborate the formation of geopolymeric gel in all the specimens, being the amount of gel formed greater in samples using commercial potassium activating solutions. These results demonstrate the feasibility of using this type of waste, OPFA, as activating reagents in the manufacture of geopolymers or alkaline activated materials. The manufactured geopolymers can be used as compressed earth blocks for walls and partitions, since the specimens pursue mechanical properties that comply with current regulations, presenting better thermal insulation properties. (C) 2021 The Author(s). Published by Elsevier B.V. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 2238-7854 2214-0697 |
| Relation: | http://hdl.handle.net/10668/18828; https://doi.org/10.1016/j.jmrt.2021.03.102; 654635900007 |
| DOI: | 10.1016/j.jmrt.2021.03.102 |
| الاتاحة: | http://hdl.handle.net/10668/18828 https://doi.org/10.1016/j.jmrt.2021.03.102 |
| Rights: | Attribution-NonCommercial-NoDerivatives 4.0 International ; http://creativecommons.org/licenses/by-nc-nd/4.0/ ; open access |
| رقم الانضمام: | edsbas.3B254DD5 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 22387854 22140697 |
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| DOI: | 10.1016/j.jmrt.2021.03.102 |