MgO-induced phase variation in alkali-activated binders synthesized under hydrothermal conditions
| العنوان: | MgO-induced phase variation in alkali-activated binders synthesized under hydrothermal conditions |
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| المؤلفون: | Hammad R. Khalid, S. J. Bae, Haeng-Ki Lee, Solmoi Park, Zhen Wang |
| المصدر: | Materials and Structures. 54 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Hydrotalcite, Chemistry, Magnesium, 0211 other engineering and technologies, Slag, chemistry.chemical_element, Sorption, 02 engineering and technology, Building and Construction, Hydrothermal circulation, Physisorption, Mechanics of Materials, visual_art, 021105 building & construction, visual_art.visual_art_medium, General Materials Science, Zeolite, Mesoporous material, Civil and Structural Engineering, Nuclear chemistry |
| الوصف: | The effects of magnesium content in the precursors on the phase formation and microstructural variation of alkali-activated binders under hydrothermal conditions are investigated. One-step hydrothermal treatment method was applied on all samples synthesized from industrial by-products (e.g., fly ash and slag), MgO powders, and alkali activator, and they were characterized by compressive strength tests, XRD, SEM, N2 sorption, and FTIR analyses. The samples containing zeolite Na-P1 and hydrotalcite crystals were obtained until the Mg/(Al + Si) molar ratio was higher than 0.58 with a 20 wt.% slag content in the precursor, however, the samples with 40 wt.% slag content possessed both of these phases even at lower Mg/(Al + Si) molar ratio of 0.39. Specifically, increasing the Mg/(Al + Si) ratio significantly reduced the formation of zeolite Na-P1, while promoted the formation of hydrotalcite. Furthermore, the extended hydrothermal treatment promoted the formation of zeolite Na-P1, but simultaneously reduced the formation of hydrotalcite. All samples exhibited mesoporous characteristics having major sorption behaviors of multilayer physisorption and capillary condensation. |
| تدمد: | 1871-6873 1359-5997 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::332adc5620f48234dbdde2e30edd130f https://doi.org/10.1617/s11527-021-01689-8 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........332adc5620f48234dbdde2e30edd130f |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 18716873 13595997 |
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