Saloma, Saloma and Hanafiah, Hanafiah and Elysandi, Debby Orjina and Meykan, Della Garnesia (2021) Effect of Na2SiO3/NaOH on Mechanical Properties and Microstructure of Geopolymer Mortar Using Fly Ash and Rice Husk Ash as Precursor (Peer Review). Faculty of Engineering Sriwijaya University. (Unpublished)
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Abstract
Geopolymer concrete is an eco-friendly concrete that can reduce carbon emissions on the earth surface because it used industrial waste material such as fly ash, rice husk ash, bagasse ash, and palm oil fuel. Geopolymer is semi crystalline amorphous materials which has irregular chemical bonds structure. The material is produced by geosynthesis of aluminosilicates and alkali-silicates which produce the Si-O-Al polymer structure. This research used the ratio of fly ash and rice husk ash as precursors e.g. 100:0, 75:25, 50:50, and 25:75. NaOH solutions of 14 M and Na2SiO3 solutions with the variation e.g. 2.5, 2.75, 3.00, and 3.25 were used as activators on mortar geopolymer mixture. The tests of fresh mortar were slump flow and setting time. The optimum compressive strength is 68.36 MPa for 28 days resulted from mixture using 100% fly ash and Na2SiO3 and NaOH with ratio 2.75. The largest value of slump flow test resulted from mixture using Na2SiO3 and NaOH with ratio 2.50 is 17.25 cm. Based on SEM test results, mortar geopolymer microstructure with mixture RHA 0% has less pores and denser CSH structure.
| Item Type: | Other |
|---|---|
| Subjects: | T Technology > TH Building construction > TH1000-1725 Systems of building construction Including fireproof construction, concrete construction |
| Divisions: | 03-Faculty of Engineering > 22101-Civil Engineering (S2) 03-Faculty of Engineering > 22201-Civil Engineering (S1) |
| Depositing User: | Saloma Hasyim |
| Date Deposited: | 04 Jun 2021 11:54 |
| Last Modified: | 04 Jun 2021 11:54 |
| URI: | http://repository.unsri.ac.id/id/eprint/47590 |
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