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dc.contributor.authorL. Handayani
dc.contributor.authorS. Aprilia
dc.contributor.authorAbdullah
dc.contributor.authorC. Rahmawati
dc.contributor.authorMohd Mustafa Al Bakri, Abdullah
dc.contributor.authorIkmal Hakem, Aziz
dc.contributor.authorEmy Aizat, Azimi
dc.contributorFaculty of Fisheries, Universitas Abulyatamaen_US
dc.contributorEngineering Faculty, University of Syiah Kualaen_US
dc.contributorDepartment of Civil Engineering, Engineering Faculty, University of Syiah Kualaen_US
dc.contributorDepartment of Civil Engineering, Engineering Faculty, Universitas Abulyatamaen_US
dc.contributorCenter of Excellence Geopolymer and Green Technology (CEGeoGTech), School of Materials Engineering, Universiti Malaysia Perlis (UniMAP)en_US
dc.contributorFaculty of Applied Science, Universiti Teknologi MARA (UiTM)en_US
dc.creatorC. Rahmawati
dc.date2022
dc.date.accessioned2022-03-30T07:49:05Z
dc.date.available2022-03-30T07:49:05Z
dc.date.issued2021-03
dc.identifier.citationJournal of Physics: Conference Series,, vol.1845, 2021, 9 pagesen_US
dc.identifier.issn1757-899x (online)
dc.identifier.urihttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/74870
dc.descriptionLink to publisher's homepage at https://iopscience.iop.org/en_US
dc.description.abstractRice husk ash (RHA), a byproduct of the rice industry, is the primary source of amorphous silica for producing sodium silicate solutions to replace standard commercial sodium silicate in geopolymer mixture design. The effect of various concentrations of NaOH used as an activator to produce epoxy-geopolymer cement was studied. Three initial concentrations of NaOH were used (8, 10, and 12M) to examine the optimum dissolution and formation of silica oligomers that can function as the activator during the geopolymerization. The result indicated the increase of NaOH concentration raises the silica yield strength. The silica yield found was 65.84%, 70.53% and 72.06% on NaOH use of 8, 10, 12 M, respectively. IR-spectra results showed silica functional groups and the sodium silicate were successfully synthesized. The IR spectra indicated the appearance of hydroxyl bonds, which strengthen the geopolymer matrix. SEM results showed the C-S-H and N-A-S-H bonds in the geopolymer. With 10M NaOH, the compressive strength of the geopolymer cement paste was optimal at 27.53 MPa. Thus, Rice husk ash (RHA) is feasible to be used as an activator in high calcium fly ash-based epoxy geopolymer cementen_US
dc.language.isoenen_US
dc.publisherIOP Publishing Ltden_US
dc.subject.otherRice husk ash (RHA)en_US
dc.subject.otherGeopolymersen_US
dc.titleSynthesis of sodium silicate from rice husk ash as an activator to produce epoxy-geopolymer cementen_US
dc.typeArticleen_US
dc.identifier.doihttps://doi.org/10.1088/1742-6596/1845/1/012072
dc.contributor.urlcutrahmawati@abulyatama.ac.iden_US


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