Please use this identifier to cite or link to this item: http://dspace.unimap.edu.my:80/xmlui/handle/123456789/34699
Full metadata record
DC FieldValueLanguage
dc.contributor.authorMohd Mustafa Al-Bakri, Abdullah-
dc.contributor.authorOmar A., Abdulkareem-
dc.contributor.authorKamarudin, Hussin, Brig. Jen. Dato' Prof. Dr.-
dc.contributor.authorKhairul Nizar, Ismail, Assoc. Prof. Dr.-
dc.contributor.authorRafiza, Abdul Razak-
dc.contributor.authorZarina, Yahya-
dc.contributor.authorAlida, Abdullah-
dc.date.accessioned2014-05-23T09:31:21Z-
dc.date.available2014-05-23T09:31:21Z-
dc.date.issued2013-
dc.identifier.citationApplied Mechanics and Materials, vol. 421, 2013, pages 342-348en_US
dc.identifier.isbn978-303785878-3-
dc.identifier.issn1660-9336-
dc.identifier.urihttp://www.scientific.net/AMM.421.342-
dc.identifier.urihttp://dspace.unimap.edu.my:80/dspace/handle/123456789/34699-
dc.descriptionLink to publisher's homepage at http://www.ttp.net/en_US
dc.description.abstractFly ash-based geopolymers are new binding materials produced to replace the ordinary Portland cement (OPC) used in concrete. In this research, the effect of alkaline activators on the compressive strength and the microstructure of low-calcium (Class F) fly ash-based geopolymers were studied. Fly ash and the alkaline activator were mixed with alkaline activator to fly ash ratios of 0.30, 0.35, and 0.40 at a constant ratio of water glass (sodium silicate) to sodium hydroxide (NaOH). The alkaline activator solution was prepared by mixing water glass with a 15 M NaOH solution. The samples were cured at a temperature 70 °C for 24 hr and maintained at room temperature until the testing was conducted. The test results indicated that the compressive strength increased when the ratio of alkaline activator to fly ash was increased at 7 days. The ratio of 0.4 produced the maximum compressive strength, which was 8.61 MPa. This was due to high reaction rate between the fly ash and the alkaline activator solution. Morphology studies, conducted by SEM analysis of the geopolymer samples, indicated that geopolymers synthesized at a ratio of 0.4 also had the most homogeneous and less porous microstructures, which was attributed to the high dissolution of the fly ash particles in the alkaline activator solution. The microstructure appearance of geopolymers treated heat temperature of 400, 600 and 800°C, shows a sintering process takes place for unreacted fly ash microspheres. It was observed as an overall, the visible microcracks formed on the surface of the highest compressive strength geopolymers only, was due to loss of water during heating.en_US
dc.language.isoenen_US
dc.publisherTrans Tech Publicationsen_US
dc.subjectAlkaline activatoren_US
dc.subjectCompressive strengthen_US
dc.subjectGeopolymeren_US
dc.subjectGeopolymerizationen_US
dc.subjectSEM analysisen_US
dc.titleMicrostructure studies on the effect of the alkaline activators of fly ash-based geopolymer at elevated heat treatment temperatureen_US
dc.typeArticleen_US
dc.contributor.urlmustafa_albakri@unimap.edu.myen_US
dc.contributor.urleng.omar83@yahoo.comen_US
dc.contributor.urlvc@unimap.edu.myen_US
dc.contributor.urlnizar@unimap.edu.myen_US
dc.contributor.urlrafizarazak@unimap.edu.myen_US
dc.contributor.urlzarinayahya@unimap.edu.myen_US
dc.contributor.urlalida@unimap.edu.myen_US
Appears in Collections:Mohd Mustafa Al Bakri Abdullah, Prof. Dr.
Alida Abdullah, Ts. Dr.
Center of Excellence for Geopolymer and Green Technology (CEGEOGTECH) (Articles)
Kamarudin Hussin, Brig. Jen. Datuk Prof. Dr.
School of Environmental Engineering (Articles)
School of Materials Engineering (Articles)
Rafiza Abd Razak, Dr.
Zarina Yahya, Dr.



Items in UniMAP Library Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.