Publication: Evaluation of performance of alkali activated mortars synthesized from ternary blends of ultrafine palm oil fuel ash, ground granulated blast-furnace slag and metakaolin
| datacite.subject.fos | oecd::Engineering and technology::Civil engineering | |
| dc.contributor.author | Menshaz, Abduallah Muftah | |
| dc.date.accessioned | 2024-01-16T05:50:45Z | |
| dc.date.available | 2024-01-16T05:50:45Z | |
| dc.date.issued | 2020-07-01 | |
| dc.description.abstract | This research focused on the synthesis of alkali activated mortars (AAMs) utilizing ultrafine palm oil fuel ash (UPOFA), ground granulated blast furnace slag (GGBFS) and metakaolin (MK) as aluminosilicate source materials. The aim of this study is to investigate the development of the compressive strength (CS) of alkaliactivated ternary mortars (AATM) and durability, complemented with mineral and microstructural characterization. The research consisted of three different phases. The first phase: evaluation of mechanical properties of AAMs fabricated from MK treated at different calcination temperatures of 650, 750 and 850°C. The optimum calcination temperature was 750°C, as the kaolin calcined at this temperature produced the highest compressive strength of 70.12 MPa at 28 days. The second phase: investigation of the optimum single precursor (UPOFA, GGBFS and optimum MK) using the Taguchi design method. The results showed that the highest compressive strength at 28 days of curing individual POFA, GGBFS and MK based AAMs are 43.93 MPa, 94.86 MPa and 70.12 MPa, respectively. This high CS can be attributed to the formation of gel binders (C–S–H and N–A–S–H) in the AAMs, as proven by XRD, FTIR, TGA/DTA and FESEM analyses. The third phase: investigation on the optimum percentage for both the binary and ternary blends which affects the CS development of the synthesized AAMs. Both MK and GGBFS based mortars exhibited improved CS results when the MK and GGBFS were replaced with UPOFA at 40 wt.% and 25 wt.%, respectively, for alkali activated binary mortars (AABM). However, in alkali activated ternary mortar (AATM) the highest CS was obtained from 35 wt.% UPOFA, 40 wt.% GGBFS and 25 wt.% MK.This research confirmed that the developed AAMs in this study has superior performance when exposed to various aggressive environments and exhibited high thermal stability when exposed to elevated temperatures up to 1000°C. | |
| dc.identifier.uri | https://erepo.usm.my/handle/123456789/18082 | |
| dc.language.iso | en | |
| dc.title | Evaluation of performance of alkali activated mortars synthesized from ternary blends of ultrafine palm oil fuel ash, ground granulated blast-furnace slag and metakaolin | |
| dc.type | Resource Types::text::thesis | |
| dspace.entity.type | Publication | |
| oairecerif.author.affiliation | Universiti Sains Malaysia |