Cargando…

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 SiO(2)/Al(2)O(3) and CaO/SiO(2). The geopolymer sam...

Descripción completa

Detalles Bibliográficos
Autores principales: Hawa, Abideng, Tonnayopas, Danupon, Prachasaree, Woraphot
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3832975/
https://www.ncbi.nlm.nih.gov/pubmed/24294140
http://dx.doi.org/10.1155/2013/857586
_version_ 1782291767011311616
author Hawa, Abideng
Tonnayopas, Danupon
Prachasaree, Woraphot
author_facet Hawa, Abideng
Tonnayopas, Danupon
Prachasaree, Woraphot
author_sort Hawa, Abideng
collection PubMed
description 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 SiO(2)/Al(2)O(3) and CaO/SiO(2). 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 (SiO(2) : Al(2)O(3) = 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.
format Online
Article
Text
id pubmed-3832975
institution National Center for Biotechnology Information
language English
publishDate 2013
publisher Hindawi Publishing Corporation
record_format MEDLINE/PubMed
spelling pubmed-38329752013-12-01 Performance Evaluation and Microstructure Characterization of Metakaolin-Based Geopolymer Containing Oil Palm Ash Hawa, Abideng Tonnayopas, Danupon Prachasaree, Woraphot ScientificWorldJournal Research Article 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 SiO(2)/Al(2)O(3) and CaO/SiO(2). 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 (SiO(2) : Al(2)O(3) = 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. Hindawi Publishing Corporation 2013-10-30 /pmc/articles/PMC3832975/ /pubmed/24294140 http://dx.doi.org/10.1155/2013/857586 Text en Copyright © 2013 Abideng Hawa et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Hawa, Abideng
Tonnayopas, Danupon
Prachasaree, Woraphot
Performance Evaluation and Microstructure Characterization of Metakaolin-Based Geopolymer Containing Oil Palm Ash
title Performance Evaluation and Microstructure Characterization of Metakaolin-Based Geopolymer Containing Oil Palm Ash
title_full Performance Evaluation and Microstructure Characterization of Metakaolin-Based Geopolymer Containing Oil Palm Ash
title_fullStr Performance Evaluation and Microstructure Characterization of Metakaolin-Based Geopolymer Containing Oil Palm Ash
title_full_unstemmed Performance Evaluation and Microstructure Characterization of Metakaolin-Based Geopolymer Containing Oil Palm Ash
title_short Performance Evaluation and Microstructure Characterization of Metakaolin-Based Geopolymer Containing Oil Palm Ash
title_sort performance evaluation and microstructure characterization of metakaolin-based geopolymer containing oil palm ash
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3832975/
https://www.ncbi.nlm.nih.gov/pubmed/24294140
http://dx.doi.org/10.1155/2013/857586
work_keys_str_mv AT hawaabideng performanceevaluationandmicrostructurecharacterizationofmetakaolinbasedgeopolymercontainingoilpalmash
AT tonnayopasdanupon performanceevaluationandmicrostructurecharacterizationofmetakaolinbasedgeopolymercontainingoilpalmash
AT prachasareeworaphot performanceevaluationandmicrostructurecharacterizationofmetakaolinbasedgeopolymercontainingoilpalmash