Investigation of mechanical properties and associated microstructure of reactive magnesia cement synthesized from reject brine
This study investigates production scaling up of MgO cement synthesized from reject brine and evaluates the mechanical properties and microstructures of the resulting MgO cement. Hydration process and carbonation degree of the resulting MgO mortar were investigated and compared with commercial MgO c...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2018
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| Online Access: | http://hdl.handle.net/10356/75542 |
| _version_ | 1811691408084434944 |
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| author | Sun, Fanxi |
| author2 | Yang En-Hua |
| author_facet | Yang En-Hua Sun, Fanxi |
| author_sort | Sun, Fanxi |
| collection | NTU |
| description | This study investigates production scaling up of MgO cement synthesized from reject brine and evaluates the mechanical properties and microstructures of the resulting MgO cement. Hydration process and carbonation degree of the resulting MgO mortar were investigated and compared with commercial MgO cement. Compressive strength, scanning electron microscopy (SEM), X-ray powder diffraction (XRD), particle size analysis, acid reactivity, and thermogravimetric and differential thermal analysis (TG/DTA) were engaged for sample characterization. Results showed that MgO cement synthesized from reject brine possesses higher mechanical strength of 32.5 MPa at the age of 28 days as compared to the commercial MgO cement (20.1 MPa). This is mainly attributed to the high reactivity of the synthesized MgO cement as revealed by the microstructure study. |
| first_indexed | 2024-10-01T06:19:25Z |
| format | Thesis |
| id | ntu-10356/75542 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:19:25Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/755422023-03-03T19:25:53Z Investigation of mechanical properties and associated microstructure of reactive magnesia cement synthesized from reject brine Sun, Fanxi Yang En-Hua School of Civil and Environmental Engineering Environmental Engineering Research Centre DRNTU::Engineering::Environmental engineering This study investigates production scaling up of MgO cement synthesized from reject brine and evaluates the mechanical properties and microstructures of the resulting MgO cement. Hydration process and carbonation degree of the resulting MgO mortar were investigated and compared with commercial MgO cement. Compressive strength, scanning electron microscopy (SEM), X-ray powder diffraction (XRD), particle size analysis, acid reactivity, and thermogravimetric and differential thermal analysis (TG/DTA) were engaged for sample characterization. Results showed that MgO cement synthesized from reject brine possesses higher mechanical strength of 32.5 MPa at the age of 28 days as compared to the commercial MgO cement (20.1 MPa). This is mainly attributed to the high reactivity of the synthesized MgO cement as revealed by the microstructure study. Master of Engineering (CEE) 2018-06-01T06:56:05Z 2018-06-01T06:56:05Z 2018 Thesis Sun, F. (2018). Investigation of mechanical properties and associated microstructure of reactive magnesia cement synthesized from reject brine. Master's thesis, Nanyang Technological University, Singapore. http://hdl.handle.net/10356/75542 10.32657/10356/75542 en Nanyang Technological University 52 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Environmental engineering Sun, Fanxi Investigation of mechanical properties and associated microstructure of reactive magnesia cement synthesized from reject brine |
| title | Investigation of mechanical properties and associated microstructure of reactive magnesia cement synthesized from reject brine |
| title_full | Investigation of mechanical properties and associated microstructure of reactive magnesia cement synthesized from reject brine |
| title_fullStr | Investigation of mechanical properties and associated microstructure of reactive magnesia cement synthesized from reject brine |
| title_full_unstemmed | Investigation of mechanical properties and associated microstructure of reactive magnesia cement synthesized from reject brine |
| title_short | Investigation of mechanical properties and associated microstructure of reactive magnesia cement synthesized from reject brine |
| title_sort | investigation of mechanical properties and associated microstructure of reactive magnesia cement synthesized from reject brine |
| topic | DRNTU::Engineering::Environmental engineering |
| url | http://hdl.handle.net/10356/75542 |
| work_keys_str_mv | AT sunfanxi investigationofmechanicalpropertiesandassociatedmicrostructureofreactivemagnesiacementsynthesizedfromrejectbrine |