Interaction of Magnesia with Limestone-Metakaolin-Calcium Hydroxide Ternary Alkali-Activated Systems
The effect of magnesia on ternary systems composed of limestone, metakaolin and calcium hydroxide, alkali activated with sodium silicate, sodium hydroxide, and sodium sulphate was studied by determination of the compressive strength, X-ray powder diffraction (XRD), thermogravimetry (TG), and scannin...
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/1249615 |
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| author | A. Cwirzen L. Metsäpelto K. Habermehl-Cwirzen |
| author_facet | A. Cwirzen L. Metsäpelto K. Habermehl-Cwirzen |
| author_sort | A. Cwirzen |
| collection | DOAJ |
| description | The effect of magnesia on ternary systems composed of limestone, metakaolin and calcium hydroxide, alkali activated with sodium silicate, sodium hydroxide, and sodium sulphate was studied by determination of the compressive strength, X-ray powder diffraction (XRD), thermogravimetry (TG), and scanning electron microscope (SEM). Pastes activated with sodium silicate and sodium sulphate showed strength regression caused by a formation of an unstable prone to cracking geopolymer gel. The presence of magnesia in sodium hydroxide-activated system hindered this trend by promoting a formation of more stable crystalline phases intermixed with brucide. In general, magnesia densified the binder matrix by promoting a formation of amorphous phases while sodium hydroxide produced the most porous microstructure containing high amount of crystalline phases. |
| format | Article |
| id | doaj-art-3f52dc683a6f476cb0bae6b310f5e199 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-3f52dc683a6f476cb0bae6b310f5e1992025-08-20T03:35:51ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/12496151249615Interaction of Magnesia with Limestone-Metakaolin-Calcium Hydroxide Ternary Alkali-Activated SystemsA. Cwirzen0L. Metsäpelto1K. Habermehl-Cwirzen2Professor, Luleå University of Technology, SE-97187 Luleå, SwedenMSc, YIT Infra Oy, Salmisaarenaukio 2, 00180 Helsinki, FinlandPhD, Senior Lecturer, Luleå University of Technology, SE-97187 Luleå, SwedenThe effect of magnesia on ternary systems composed of limestone, metakaolin and calcium hydroxide, alkali activated with sodium silicate, sodium hydroxide, and sodium sulphate was studied by determination of the compressive strength, X-ray powder diffraction (XRD), thermogravimetry (TG), and scanning electron microscope (SEM). Pastes activated with sodium silicate and sodium sulphate showed strength regression caused by a formation of an unstable prone to cracking geopolymer gel. The presence of magnesia in sodium hydroxide-activated system hindered this trend by promoting a formation of more stable crystalline phases intermixed with brucide. In general, magnesia densified the binder matrix by promoting a formation of amorphous phases while sodium hydroxide produced the most porous microstructure containing high amount of crystalline phases.http://dx.doi.org/10.1155/2018/1249615 |
| spellingShingle | A. Cwirzen L. Metsäpelto K. Habermehl-Cwirzen Interaction of Magnesia with Limestone-Metakaolin-Calcium Hydroxide Ternary Alkali-Activated Systems Advances in Materials Science and Engineering |
| title | Interaction of Magnesia with Limestone-Metakaolin-Calcium Hydroxide Ternary Alkali-Activated Systems |
| title_full | Interaction of Magnesia with Limestone-Metakaolin-Calcium Hydroxide Ternary Alkali-Activated Systems |
| title_fullStr | Interaction of Magnesia with Limestone-Metakaolin-Calcium Hydroxide Ternary Alkali-Activated Systems |
| title_full_unstemmed | Interaction of Magnesia with Limestone-Metakaolin-Calcium Hydroxide Ternary Alkali-Activated Systems |
| title_short | Interaction of Magnesia with Limestone-Metakaolin-Calcium Hydroxide Ternary Alkali-Activated Systems |
| title_sort | interaction of magnesia with limestone metakaolin calcium hydroxide ternary alkali activated systems |
| url | http://dx.doi.org/10.1155/2018/1249615 |
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