In-situ formation of geopolymer foams through addition of silica fume: Preparation and sinterability
Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperatur...
Ausführliche Beschreibung
Autor*in: |
Abo Sawan, S.E. [verfasserIn] |
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E-Artikel |
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Englisch |
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2020transfer abstract |
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Übergeordnetes Werk: |
Enthalten in: Road traffic crash characteristics of drivers who take prescription medicines that carry a risk to driving - Lu, Li ELSEVIER, 2020, including materials science communications : an international, interdisciplinary journal on science characterization and processing of advanced materials : the international journal of the Chinese Society for Materials Science, New York, NY [u.a.] |
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Übergeordnetes Werk: |
volume:239 ; year:2020 ; day:1 ; month:01 ; pages:0 |
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DOI / URN: |
10.1016/j.matchemphys.2019.121998 |
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ELV048594148 |
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520 | |a Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. | ||
520 | |a Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. | ||
650 | 7 | |a Geopolymer |2 Elsevier | |
650 | 7 | |a Densification |2 Elsevier | |
650 | 7 | |a Foam |2 Elsevier | |
650 | 7 | |a Silica fume |2 Elsevier | |
650 | 7 | |a Properties |2 Elsevier | |
700 | 1 | |a Zawrah, M.F. |4 oth | |
700 | 1 | |a Khattab, R.M. |4 oth | |
700 | 1 | |a Abdel-Shafi, Ayman A. |4 oth | |
773 | 0 | 8 | |i Enthalten in |n Elsevier |a Lu, Li ELSEVIER |t Road traffic crash characteristics of drivers who take prescription medicines that carry a risk to driving |d 2020 |d including materials science communications : an international, interdisciplinary journal on science characterization and processing of advanced materials : the international journal of the Chinese Society for Materials Science |g New York, NY [u.a.] |w (DE-627)ELV005250781 |
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10.1016/j.matchemphys.2019.121998 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000916.pica (DE-627)ELV048594148 (ELSEVIER)S0254-0584(19)30796-5 DE-627 ger DE-627 rakwb eng 610 VZ 44.38 bkl 44.91 bkl Abo Sawan, S.E. verfasserin aut In-situ formation of geopolymer foams through addition of silica fume: Preparation and sinterability 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. Geopolymer Elsevier Densification Elsevier Foam Elsevier Silica fume Elsevier Properties Elsevier Zawrah, M.F. oth Khattab, R.M. oth Abdel-Shafi, Ayman A. oth Enthalten in Elsevier Lu, Li ELSEVIER Road traffic crash characteristics of drivers who take prescription medicines that carry a risk to driving 2020 including materials science communications : an international, interdisciplinary journal on science characterization and processing of advanced materials : the international journal of the Chinese Society for Materials Science New York, NY [u.a.] (DE-627)ELV005250781 volume:239 year:2020 day:1 month:01 pages:0 https://doi.org/10.1016/j.matchemphys.2019.121998 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.38 Pharmakologie VZ 44.91 Psychiatrie Psychopathologie VZ AR 239 2020 1 0101 0 |
spelling |
10.1016/j.matchemphys.2019.121998 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000916.pica (DE-627)ELV048594148 (ELSEVIER)S0254-0584(19)30796-5 DE-627 ger DE-627 rakwb eng 610 VZ 44.38 bkl 44.91 bkl Abo Sawan, S.E. verfasserin aut In-situ formation of geopolymer foams through addition of silica fume: Preparation and sinterability 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. Geopolymer Elsevier Densification Elsevier Foam Elsevier Silica fume Elsevier Properties Elsevier Zawrah, M.F. oth Khattab, R.M. oth Abdel-Shafi, Ayman A. oth Enthalten in Elsevier Lu, Li ELSEVIER Road traffic crash characteristics of drivers who take prescription medicines that carry a risk to driving 2020 including materials science communications : an international, interdisciplinary journal on science characterization and processing of advanced materials : the international journal of the Chinese Society for Materials Science New York, NY [u.a.] (DE-627)ELV005250781 volume:239 year:2020 day:1 month:01 pages:0 https://doi.org/10.1016/j.matchemphys.2019.121998 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.38 Pharmakologie VZ 44.91 Psychiatrie Psychopathologie VZ AR 239 2020 1 0101 0 |
allfields_unstemmed |
10.1016/j.matchemphys.2019.121998 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000916.pica (DE-627)ELV048594148 (ELSEVIER)S0254-0584(19)30796-5 DE-627 ger DE-627 rakwb eng 610 VZ 44.38 bkl 44.91 bkl Abo Sawan, S.E. verfasserin aut In-situ formation of geopolymer foams through addition of silica fume: Preparation and sinterability 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. Geopolymer Elsevier Densification Elsevier Foam Elsevier Silica fume Elsevier Properties Elsevier Zawrah, M.F. oth Khattab, R.M. oth Abdel-Shafi, Ayman A. oth Enthalten in Elsevier Lu, Li ELSEVIER Road traffic crash characteristics of drivers who take prescription medicines that carry a risk to driving 2020 including materials science communications : an international, interdisciplinary journal on science characterization and processing of advanced materials : the international journal of the Chinese Society for Materials Science New York, NY [u.a.] (DE-627)ELV005250781 volume:239 year:2020 day:1 month:01 pages:0 https://doi.org/10.1016/j.matchemphys.2019.121998 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.38 Pharmakologie VZ 44.91 Psychiatrie Psychopathologie VZ AR 239 2020 1 0101 0 |
allfieldsGer |
10.1016/j.matchemphys.2019.121998 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000916.pica (DE-627)ELV048594148 (ELSEVIER)S0254-0584(19)30796-5 DE-627 ger DE-627 rakwb eng 610 VZ 44.38 bkl 44.91 bkl Abo Sawan, S.E. verfasserin aut In-situ formation of geopolymer foams through addition of silica fume: Preparation and sinterability 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. Geopolymer Elsevier Densification Elsevier Foam Elsevier Silica fume Elsevier Properties Elsevier Zawrah, M.F. oth Khattab, R.M. oth Abdel-Shafi, Ayman A. oth Enthalten in Elsevier Lu, Li ELSEVIER Road traffic crash characteristics of drivers who take prescription medicines that carry a risk to driving 2020 including materials science communications : an international, interdisciplinary journal on science characterization and processing of advanced materials : the international journal of the Chinese Society for Materials Science New York, NY [u.a.] (DE-627)ELV005250781 volume:239 year:2020 day:1 month:01 pages:0 https://doi.org/10.1016/j.matchemphys.2019.121998 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.38 Pharmakologie VZ 44.91 Psychiatrie Psychopathologie VZ AR 239 2020 1 0101 0 |
allfieldsSound |
10.1016/j.matchemphys.2019.121998 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000916.pica (DE-627)ELV048594148 (ELSEVIER)S0254-0584(19)30796-5 DE-627 ger DE-627 rakwb eng 610 VZ 44.38 bkl 44.91 bkl Abo Sawan, S.E. verfasserin aut In-situ formation of geopolymer foams through addition of silica fume: Preparation and sinterability 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. Geopolymer Elsevier Densification Elsevier Foam Elsevier Silica fume Elsevier Properties Elsevier Zawrah, M.F. oth Khattab, R.M. oth Abdel-Shafi, Ayman A. oth Enthalten in Elsevier Lu, Li ELSEVIER Road traffic crash characteristics of drivers who take prescription medicines that carry a risk to driving 2020 including materials science communications : an international, interdisciplinary journal on science characterization and processing of advanced materials : the international journal of the Chinese Society for Materials Science New York, NY [u.a.] (DE-627)ELV005250781 volume:239 year:2020 day:1 month:01 pages:0 https://doi.org/10.1016/j.matchemphys.2019.121998 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.38 Pharmakologie VZ 44.91 Psychiatrie Psychopathologie VZ AR 239 2020 1 0101 0 |
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in-situ formation of geopolymer foams through addition of silica fume: preparation and sinterability |
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In-situ formation of geopolymer foams through addition of silica fume: Preparation and sinterability |
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Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. |
abstractGer |
Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. |
abstract_unstemmed |
Recently, the production of clean binding materials without energy consumption and CO2 emission has paid a great attention. In-situ formation of geopolymer foams through addition of silica-fume waste is the main goal of the present study. Moreover, an attempt to study the effect sintering temperature on the prepared geopolymer foams was also conducted. Through geopolymer formation, the silicon impurity in silica fume reacted with the alkali activator and produced hydrogen gas which entrapped inside the structures generating highly porous foams. Geopolymer foams were prepared by alkali activation of metakaolin with partially replacement by 2.5, 5 and 7.5 mass-% silica fume. To study the effect of temperature or sinterability, the prepared geopolymer foams were sintered at 800, 1000 and 1200 °C. Both dried and sintered geopolymers were subjected for assessment by various tools. The physical, microstructural and mechanical properties were investigated. The results revealed that porosity percentage of dried and sintered geopolymers increased with increasing the amount of added silica fume and decreased with increasing sintering temperature. On the other hand, the compressive strength was opposite to the porosity trend. Generally, the best results were for the geopolymer that contains 5% silica fume. The optimum sintering temperature to produce sintered ceramics having good properties was 1000 °C. |
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In-situ formation of geopolymer foams through addition of silica fume: Preparation and sinterability |
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