Effect of alkaline activator properties on the fly ash based geopolymer concrete for ambient curing condition
Geopolymer is synthesized by activating alumino-silicate materials with an alkaline activator. The curing temperature has a significant effect on the setting and strength gain of geopolymers and curing is usually done at an elevated temperature. In addition to the curing temperature, the properties...
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| Format: | Conference Paper |
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Concrete Institute of Australia
2013
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/4360 |
| _version_ | 1848744494343651328 |
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| author | Nath, Pradip Sarker, Prabir |
| author2 | Vinh Dao |
| author_facet | Vinh Dao Nath, Pradip Sarker, Prabir |
| author_sort | Nath, Pradip |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Geopolymer is synthesized by activating alumino-silicate materials with an alkaline activator. The curing temperature has a significant effect on the setting and strength gain of geopolymers and curing is usually done at an elevated temperature. In addition to the curing temperature, the properties of geopolymer mixture are influenced by the type, chemical compositions and doses of alkaline activator solutions. The aim of this study is to investigate the effect of various mixture parameters of alkaline activator solution on the properties of fly ash based geopolymer mixture produced in ambient curing condition. Class F fly ash was used to prepare geopolymer mortars. Ordinary Portland cement was added as an additive with fly ash to enhance the early age properties of concrete in ambient curing condition (about 23oC and RH 60±10%). Fly ash was activated by a mixture of sodium silicate (SS) solution and sodium hydroxide (SH) solution. Three different types of SS were mixed with SH in different ratios (SS/SH = 1.5, 2.0, 2.5). The results indicate that, setting time and compressive strength of the OPC blended fly ash geopolymer mixture vary with the variation of chemical composition of alkaline activator solution. The critical molar ratios of geopolymer mixture were correlated with the properties of the mixtures. Generally, strength increased with the increase of Na2O/SiO2 and decrease of H2O/Na2O ratio. |
| first_indexed | 2025-11-14T06:02:21Z |
| format | Conference Paper |
| id | curtin-20.500.11937-4360 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:02:21Z |
| publishDate | 2013 |
| publisher | Concrete Institute of Australia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-43602023-02-07T08:01:23Z Effect of alkaline activator properties on the fly ash based geopolymer concrete for ambient curing condition Nath, Pradip Sarker, Prabir Vinh Dao Peter Dux Alkali activation fly ash setting time geopolymer ambient curing Geopolymer is synthesized by activating alumino-silicate materials with an alkaline activator. The curing temperature has a significant effect on the setting and strength gain of geopolymers and curing is usually done at an elevated temperature. In addition to the curing temperature, the properties of geopolymer mixture are influenced by the type, chemical compositions and doses of alkaline activator solutions. The aim of this study is to investigate the effect of various mixture parameters of alkaline activator solution on the properties of fly ash based geopolymer mixture produced in ambient curing condition. Class F fly ash was used to prepare geopolymer mortars. Ordinary Portland cement was added as an additive with fly ash to enhance the early age properties of concrete in ambient curing condition (about 23oC and RH 60±10%). Fly ash was activated by a mixture of sodium silicate (SS) solution and sodium hydroxide (SH) solution. Three different types of SS were mixed with SH in different ratios (SS/SH = 1.5, 2.0, 2.5). The results indicate that, setting time and compressive strength of the OPC blended fly ash geopolymer mixture vary with the variation of chemical composition of alkaline activator solution. The critical molar ratios of geopolymer mixture were correlated with the properties of the mixtures. Generally, strength increased with the increase of Na2O/SiO2 and decrease of H2O/Na2O ratio. 2013 Conference Paper http://hdl.handle.net/20.500.11937/4360 Concrete Institute of Australia restricted |
| spellingShingle | Alkali activation fly ash setting time geopolymer ambient curing Nath, Pradip Sarker, Prabir Effect of alkaline activator properties on the fly ash based geopolymer concrete for ambient curing condition |
| title | Effect of alkaline activator properties on the fly ash based geopolymer concrete for ambient curing condition |
| title_full | Effect of alkaline activator properties on the fly ash based geopolymer concrete for ambient curing condition |
| title_fullStr | Effect of alkaline activator properties on the fly ash based geopolymer concrete for ambient curing condition |
| title_full_unstemmed | Effect of alkaline activator properties on the fly ash based geopolymer concrete for ambient curing condition |
| title_short | Effect of alkaline activator properties on the fly ash based geopolymer concrete for ambient curing condition |
| title_sort | effect of alkaline activator properties on the fly ash based geopolymer concrete for ambient curing condition |
| topic | Alkali activation fly ash setting time geopolymer ambient curing |
| url | http://hdl.handle.net/20.500.11937/4360 |