Enhancing class F fly ash geopolymer concrete performance using lime and steam curing
Abstract Background Producing fly ash geopolymer concrete (FGPC) which can be cured by air, water, or steam instead of thermal curing without decreasing its mechanical properties will facilitate using FGPC in cast-in situ applications and precast concrete industry. Furthermore, it will decrease the...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2022-06-01
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| Series: | Journal of Engineering and Applied Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s44147-022-00111-6 |
| _version_ | 1811328722610946048 |
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| author | Muhammad Ahmad Diab |
| author_facet | Muhammad Ahmad Diab |
| author_sort | Muhammad Ahmad Diab |
| collection | DOAJ |
| description | Abstract Background Producing fly ash geopolymer concrete (FGPC) which can be cured by air, water, or steam instead of thermal curing without decreasing its mechanical properties will facilitate using FGPC in cast-in situ applications and precast concrete industry. Furthermore, it will decrease the consumed energy in FGPC production. This research attempts to achieve this goal by investigating the efficacy of supplementing class F FGPC with lime while using different curing processes to generate lime-fly ash geopolymer concrete (L-FGPC) that could be a feasible alternative to ordinary FGPC. Methods The studied variables included lime content, molarity of sodium hydroxide (NaOH), additional water content, curing type, and moisture of aggregates. The comparative criteria were setting times of fresh concrete, mechanical properties of hardened concrete, and voids ratio. SEM and X-ray diffraction tests were used to validate test results. Conclusions Steam curing generated the best mechanical properties of L-FGPC. Using 2% lime content with steam-cured L-FGPC yielded proper setting times and the best mechanical properties. Microstructure tests revealed compact microstructure and decreased voids ratio upon using 2% lime content in L-FGPC. Increasing molarity of NaOH, decreasing additional water content, and decreasing moisture of aggregates enhanced L-FGPC’s mechanical properties. |
| first_indexed | 2024-04-13T15:31:01Z |
| format | Article |
| id | doaj.art-785f19292e1b417b9dce7b8635ca17c1 |
| institution | Directory Open Access Journal |
| issn | 1110-1903 2536-9512 |
| language | English |
| last_indexed | 2024-04-13T15:31:01Z |
| publishDate | 2022-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Engineering and Applied Science |
| spelling | doaj.art-785f19292e1b417b9dce7b8635ca17c12022-12-22T02:41:23ZengSpringerOpenJournal of Engineering and Applied Science1110-19032536-95122022-06-0169111910.1186/s44147-022-00111-6Enhancing class F fly ash geopolymer concrete performance using lime and steam curingMuhammad Ahmad Diab0Structural Engineering Department, Faculty of Engineering, Alexandria UniversityAbstract Background Producing fly ash geopolymer concrete (FGPC) which can be cured by air, water, or steam instead of thermal curing without decreasing its mechanical properties will facilitate using FGPC in cast-in situ applications and precast concrete industry. Furthermore, it will decrease the consumed energy in FGPC production. This research attempts to achieve this goal by investigating the efficacy of supplementing class F FGPC with lime while using different curing processes to generate lime-fly ash geopolymer concrete (L-FGPC) that could be a feasible alternative to ordinary FGPC. Methods The studied variables included lime content, molarity of sodium hydroxide (NaOH), additional water content, curing type, and moisture of aggregates. The comparative criteria were setting times of fresh concrete, mechanical properties of hardened concrete, and voids ratio. SEM and X-ray diffraction tests were used to validate test results. Conclusions Steam curing generated the best mechanical properties of L-FGPC. Using 2% lime content with steam-cured L-FGPC yielded proper setting times and the best mechanical properties. Microstructure tests revealed compact microstructure and decreased voids ratio upon using 2% lime content in L-FGPC. Increasing molarity of NaOH, decreasing additional water content, and decreasing moisture of aggregates enhanced L-FGPC’s mechanical properties.https://doi.org/10.1186/s44147-022-00111-6Fly ash geopolymer concreteLimeSetting propertiesMechanical propertiesSEMX-ray diffraction |
| spellingShingle | Muhammad Ahmad Diab Enhancing class F fly ash geopolymer concrete performance using lime and steam curing Journal of Engineering and Applied Science Fly ash geopolymer concrete Lime Setting properties Mechanical properties SEM X-ray diffraction |
| title | Enhancing class F fly ash geopolymer concrete performance using lime and steam curing |
| title_full | Enhancing class F fly ash geopolymer concrete performance using lime and steam curing |
| title_fullStr | Enhancing class F fly ash geopolymer concrete performance using lime and steam curing |
| title_full_unstemmed | Enhancing class F fly ash geopolymer concrete performance using lime and steam curing |
| title_short | Enhancing class F fly ash geopolymer concrete performance using lime and steam curing |
| title_sort | enhancing class f fly ash geopolymer concrete performance using lime and steam curing |
| topic | Fly ash geopolymer concrete Lime Setting properties Mechanical properties SEM X-ray diffraction |
| url | https://doi.org/10.1186/s44147-022-00111-6 |
| work_keys_str_mv | AT muhammadahmaddiab enhancingclassfflyashgeopolymerconcreteperformanceusinglimeandsteamcuring |