Comparative Deflection Hardening Behavior of Fiber Reinforced Fly Ash Based Geopolymer Composites
This study evaluates the behavior of a recently developed ductile fiber reinforced geopolymer composite(DFRGC) exhibiting deflection hardening and multiple cracking behavior in flexure employing four different activator combinations including two Na-based and one K-based activator solutions, and one...
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| Format: | Journal Article |
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ELSEVIER
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/14179 |
| _version_ | 1848748553347792896 |
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| author | Nematollahi, B. Sanjayan, J. Shaikh, Faiz |
| author_facet | Nematollahi, B. Sanjayan, J. Shaikh, Faiz |
| author_sort | Nematollahi, B. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This study evaluates the behavior of a recently developed ductile fiber reinforced geopolymer composite(DFRGC) exhibiting deflection hardening and multiple cracking behavior in flexure employing four different activator combinations including two Na-based and one K-based activator solutions, and oneCa-based activator combination in the form of powder. Randomly oriented short poly vinyl alcohol (PVA) fibers (2% v/v) were used to reinforce the relatively brittle low calcium (Class F) fly ash-based geopolymer matrix. The matrix and composite properties of the developed fly ash-based DFRGCs including workability of the fresh matrix, density, compressive strength, matrix fracture properties comprising elastic modulus, fracture toughness and composite crack tip toughness, and flexural behavior were evaluated. A reference ductile fiber reinforced cementitious composite (DFRCC) with water to cement ratio corresponding to the activator solution to fly ash ratio of the DFRGCs was also made for comparison. Experimental results revealed that all DFRGCs, regardless of their type of activator combinations, exhibited deflection hardening behavior accompanied by multiple fine cracks in bending. The DFRGC-Na-1composite exhibited superior deflection capacity, matrix fracture properties, compressive and flexural strengths with significantly enhanced composite ductility and toughness. |
| first_indexed | 2025-11-14T07:06:52Z |
| format | Journal Article |
| id | curtin-20.500.11937-14179 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:06:52Z |
| publishDate | 2014 |
| publisher | ELSEVIER |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-141792017-09-13T15:02:44Z Comparative Deflection Hardening Behavior of Fiber Reinforced Fly Ash Based Geopolymer Composites Nematollahi, B. Sanjayan, J. Shaikh, Faiz DFRCC DFRGC Fly ash PVA fiber Deflection hardening Activator Geopolymer Multiple cracking This study evaluates the behavior of a recently developed ductile fiber reinforced geopolymer composite(DFRGC) exhibiting deflection hardening and multiple cracking behavior in flexure employing four different activator combinations including two Na-based and one K-based activator solutions, and oneCa-based activator combination in the form of powder. Randomly oriented short poly vinyl alcohol (PVA) fibers (2% v/v) were used to reinforce the relatively brittle low calcium (Class F) fly ash-based geopolymer matrix. The matrix and composite properties of the developed fly ash-based DFRGCs including workability of the fresh matrix, density, compressive strength, matrix fracture properties comprising elastic modulus, fracture toughness and composite crack tip toughness, and flexural behavior were evaluated. A reference ductile fiber reinforced cementitious composite (DFRCC) with water to cement ratio corresponding to the activator solution to fly ash ratio of the DFRGCs was also made for comparison. Experimental results revealed that all DFRGCs, regardless of their type of activator combinations, exhibited deflection hardening behavior accompanied by multiple fine cracks in bending. The DFRGC-Na-1composite exhibited superior deflection capacity, matrix fracture properties, compressive and flexural strengths with significantly enhanced composite ductility and toughness. 2014 Journal Article http://hdl.handle.net/20.500.11937/14179 10.1016/j.conbuildmat.2014.07.085 ELSEVIER restricted |
| spellingShingle | DFRCC DFRGC Fly ash PVA fiber Deflection hardening Activator Geopolymer Multiple cracking Nematollahi, B. Sanjayan, J. Shaikh, Faiz Comparative Deflection Hardening Behavior of Fiber Reinforced Fly Ash Based Geopolymer Composites |
| title | Comparative Deflection Hardening Behavior of Fiber Reinforced Fly Ash Based Geopolymer Composites |
| title_full | Comparative Deflection Hardening Behavior of Fiber Reinforced Fly Ash Based Geopolymer Composites |
| title_fullStr | Comparative Deflection Hardening Behavior of Fiber Reinforced Fly Ash Based Geopolymer Composites |
| title_full_unstemmed | Comparative Deflection Hardening Behavior of Fiber Reinforced Fly Ash Based Geopolymer Composites |
| title_short | Comparative Deflection Hardening Behavior of Fiber Reinforced Fly Ash Based Geopolymer Composites |
| title_sort | comparative deflection hardening behavior of fiber reinforced fly ash based geopolymer composites |
| topic | DFRCC DFRGC Fly ash PVA fiber Deflection hardening Activator Geopolymer Multiple cracking |
| url | http://hdl.handle.net/20.500.11937/14179 |