Development of low temperature lightweight geopolymer aggregate, from industrial Waste, in comparison with high temperature processed aggregates
| Autor: | Sylvie Rossignol, J. Gautron, Julie Peyne, J. Doudeau |
|---|---|
| Přispěvatelé: | IRCER - Axe 3 : organisation structurale multiéchelle des matériaux (IRCER-AXE3), Institut de Recherche sur les CERamiques (IRCER), Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut des Procédés Appliqués aux Matériaux (IPAM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Absorption of water Silica fume Strategy and Management 0211 other engineering and technologies Sodium silicate 02 engineering and technology 7. Clean energy Industrial and Manufacturing Engineering Laser flash analysis 12. Responsible consumption [SPI.MAT]Engineering Sciences [physics]/Materials chemistry.chemical_compound 021105 building & construction Composite material Porosity ComputingMilieux_MISCELLANEOUS General Environmental Science Aggregate (composite) Renewable Energy Sustainability and the Environment [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Microstructure Geopolymer chemistry 13. Climate action 0210 nano-technology |
| Zdroj: | Journal of Cleaner Production Journal of Cleaner Production, Elsevier, 2018, 189, pp.47-58. ⟨10.1016/j.jclepro.2018.04.038⟩ |
| ISSN: | 0959-6526 |
| DOI: | 10.1016/j.jclepro.2018.04.038⟩ |
| Popis: | The purpose of this study is the development of new aggregates based on geopolymer formulations in order to replace commercial lightweight aggregates (LWAs), which require high energy consumption due to its industrial sintering process. Geopolymers are innovative materials which are synthesized at low temperature and which exhibit efficient mechanical and thermal properties. Thus, the feasibility of producing geopolymer aggregates was investigated. Numerous metakaolins and by products of bricks production were applied in a porous geopolymer formulation using sodium silicate solution, and silica fume as pore forming agent. Among 30 compositions, four mixtures exhibit suitable water resistance properties to replace LWAs. Then, these mixtures were investigated by in situ Fourier Transform InfraRed spectroscopy study. Thermal and mechanical properties of the synthesized samples were also determined by Laser Flash method and compressive test (crushing tests for the aggregates). Next, the microstructure of the porous aggregates was evaluated through image analysis, SEM observations. Finally, various critical environments such as fire and freeze-thaw test were applied on the aggregates. Geopolymer aggregates reveal thermal properties, density values, water absorption rate and also a crushing behavior similar to the commercial aggregates. They remained constant after a freeze-thaw test and fire test. Consequently, this work has demonstrated the great potential of geopolymer aggregates to replace LWAs, since they exhibit similar properties and more eco-friendly production process. |
| Databáze: | OpenAIRE |
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