Ghanim, Hadria Abd Alati Eisay and Alengaram, U. Johnson and Bunnori, Norazura Muhamad and Ibrahim, Muhammad Shazril Idris and Pujianiki, Ni Nyoman (2025) Exemplification of efficacy of homebrewed sodium silicate solution processed from eco-processed pozzolan and palm oil clinker powder in geopolymer mortar. Construction and Building Materials, 460. p. 139825. ISSN 0950-0618, DOI https://doi.org/10.1016/j.conbuildmat.2024.139825.
Full text not available from this repository.Abstract
This study investigated the extraction of alternative sodium silicates using a hydrothermal method, utilizing waste and industrial by-product materials, namely, eco-processed pozzolan (EPP) and palm oil clinker powder (POCP) with moderate silica content. Sodium hydroxide (NaOH) was used at three different molar concentrations of 3, 6, and 9 M. Extraction was conducted by mixing the contents in a solution form for 5 h at 80 degrees C. Moreover, their effects on the development of a geopolymer mortar with 80 % fly ash (FA) and 20 % groundgranulated blast-furnace slag (GGBS) were investigated in terms of flowability, hardened density, ultrasonic pulse velocity (UPV), compressive strength for up to 56 d, field emission scanning electron microscopy (FESEM), and X-ray diffraction (XRD). The results demonstrated an enhancement in the compressive strength across all mixes, with values comparable to those observed in the mixes prepared using conventional sodium silicate. The compressive strengths of the mixes P1-COM (control), P1-POCP-9M, and P1-EPP-9M at 56 days were 62.9, 58.9, and 60.1 MPa, respectively. The specimens activated with extracted sodium silicate (ESS) using 9M-NaOH had a greater compressive strength than those with 3 M and 6M-NaOH. Additionally, an inverse relationship was observed between the NaOH concentration used in the ESS and the flow properties of the geopolymer mortar. The flowability was reduced by 11.53 % and 11.43 % in the case of mixes P1-POCP and P1-EPP, respectively, when 9M-NaOH was used for producing ESS. Microstructural analysis revealed the formation of the C-A-S-H and N-A-S-H phases in the specimens activated with COM-SS and P1-EPP-9M. In contrast, P1-POCP-9M led to the development of both K-A-S-H and N-A-S-H phases.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education, Malaysia through the Fundamental Research Grant Scheme (FRGS) (FRGS/1/2022/TK01/UM/02/4), Indonesia Ministry of Education, Culture, Research and Technology, via International Partnership Institution-Based Research (INSPIRE) |
| Uncontrolled Keywords: | Extracted sodium silicate; Palm oil clinker powder; Eco-processed pozzolan; Geopolymer mortar; Compressive strength; Mineralogical characterization; And microstructural |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering > Department of Civil Engineering Deputy Vice Chancellor (Research & Innovation) Office > Institute of Ocean and Earth Sciences |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 26 May 2025 01:45 |
| Last Modified: | 26 May 2025 01:45 |
| URI: | http://eprints.um.edu.my/id/eprint/48013 |
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