Karyawan, I Dewa Made Alit (2022) Characteristics of fly ash geopolymer based on alkaline ratio of activators for building materials: A review. Characteristics of fly ash geopolymer based on alkaline ratio of activators for building materials: A review, 18 (1). pp. 18-22. ISSN p-ISSN 1693-024X, e-ISSN 2654-4113
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Abstract
The geopolymer introduced by Davidovits is a new binder for making concrete as an alternative to ordinary Portland cement. One of the materials used to make geopolymers is fly ash. The annual worldwide production of fly ash is estimated to be around 500 Mt. In making geopolymers with fly ash, scientists usually use activators such as silicate and aluminate solutions, as well as with kaolinite. The geopolymerization process is related to the metal oxide ratio of the activator solution. Geopolymers can withstand temperatures up to about 600°C, so they are fire/heat resistant. This paper describes the role of the comparison of dominant elements in a mixture of geopolymer paste with fly ash and alkali which produces the best quality based on compressive strength, where there is an effect of the ratio of alkali on the compressive strength of geopolymer paste. Almost all of the highest compressive strength obtained did not follow the Davidovits rule. This is caused by other factors that affect the compressive strength such as the content of elements such as Si and Al in fly ash and the curing temperature. However, the volumetric and mechanical properties of the artificial aggregate (geopolymer fly ash application) meet the requirements as a road material. It's just that the absorption value is above the requirements (>3%). Seeing the properties of these geopolymers, there is hope to be developed into materials for building materials.
| Item Type: | Article |
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| Keywords (Kata Kunci): | Alkali ratio, building materials, fly ash geopolymer. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Fakultas Teknik |
| Depositing User: | Dr. Ir. I Dewa Made Alit Karyawan, MT. |
| Date Deposited: | 03 Jun 2023 07:19 |
| Last Modified: | 03 Jun 2023 07:19 |
| URI: | http://eprints.unram.ac.id/id/eprint/39079 |
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