Performance evaluation and microstructure characterization of metakaolin-based geopolymer containing oil palm ash.
This study reports on the microstructure, compressive strength, and drying shrinkage of metakaolin (MK) based geopolymers produced by partially replacing MK by oil palm ash (OPA). The OPA was used as raw material producing different molar ratios of SiO₂/Al₂O₃ and CaO/SiO₂. The geopolymer samples wer...
| Publicado en: | Scientific World Journal pp. 857586 - 857587 |
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| Autores principales: | , , |
| Formato: | research Journal Article |
| Publicado: |
Wiley-Blackwell
2013
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104121161&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104121161 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 1537744X 1BX5 jtl: Scientific World Journal issn: 1537744X maglogo: N pubinfo: dt: 2013 pid: 480 pub: Wiley-Blackwell place: Malden, Massachusetts artinfo: ui: 104121161 NLM24294140 2012402092 10.1155/2013/857586 NLM24294140 PMC3832975 104121161 ppf: 857586 ppct: 1 formats: tig: atl: Performance evaluation and microstructure characterization of metakaolin-based geopolymer containing oil palm ash. aug: au: Hawa, Abideng Tonnayopas, Danupon Prachasaree, Woraphot affil: Department of Civil Engineering, Prince of Songkla University, Songkhla 90112, Thailand. sug: subj: Kaolin Plant Oils Polymers Materials Testing Microscopy, Electron, Scanning Molecular Structure X-Rays ab: This study reports on the microstructure, compressive strength, and drying shrinkage of metakaolin (MK) based geopolymers produced by partially replacing MK by oil palm ash (OPA). The OPA was used as raw material producing different molar ratios of SiO₂/Al₂O₃ and CaO/SiO₂. The geopolymer samples were cured at 80°C for 1, 2, or 4 hours and kept at ambient temperature until testing. The compressive strength was measured after 2, 6, and 24 hours and 7 and 28 days. The testing results revealed that the geopolymer with 5% OPA (SiO₂ : Al₂O₃ = 2.88 : 1) gave the highest compressive strength. Scanning electron microscopy (SEM) indicated that the 5% OPA sample had a dense-compact matrix and less unreacted raw materials which contributed to the higher compressive strength. In the X-ray diffraction (XRD) patterns, the change of the crystalline phase after heat curing for 4 hours was easily detectable compared to the samples subjected to a shorter period of heat curing. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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