Nur Azzimah, Zamri and Khairunisa, Muthusamy and Nasly, Mohamed Ali (2016) Durability of OPS Lightweight Aggregate Concrete Containing Palm Oil Fuel Ash after Long Term Exposure in Sulphate Environment. In: Proceedings of The National Conference for Postgraduate Research (NCON-PGR 2016) , 24-25 September 2016 , Universiti Malaysia Pahang (UMP), Pekan, Pahang. pp. 525-528..
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Abstract
As one of the world largest palm oil producers, Malaysia continuously generates a large amount of by-product namely oil palm shell (OPS) and palm oil fuel ash (POFA) which disposed as environmentally polluting waste. In order to reduce amount of waste disposed, researchers manage to use these wastes in construction material production leading to development of oil palm shell lightweight aggregate concrete containing palm oil fuel ash as partial cement replacement. The present research was conducted to investigate the sulphate resistance of oil palm shell lightweight aggregate concrete containing finely ground palm oil fuel ash. Two types of mixes of Grade 30 are prepared. Oil palm shell lightweight aggregate concrete (OPS LWAC) is a control specimen and another one containing twenty percent of palm oil fuel ash (POFA) as partial cement replacement. Both mixes were water cured for 28 days before immersed in sodium sulphate solution for a period of 47 weeks. This test was conducted for a long period as demand for long service lives construction in harsh environments increases. The mass of the specimens were measured from time to time in order determine the behavior of the specimens upon sulphate attack. Compressive strength test and microstructure study was also carried out at the end of immersion period. The result shows that oil palm shell lightweight aggregate concrete containing finely ground palm oil fuel ash exhibit lower percentage in mass change and strength deterioration compared to plain specimen. Integration of palm oil fuel ash as partial cement replacement enhances the resistance of oil palm shell lightweight aggregate concrete towards sulphate attack although left in the sulphate environment for a long period. Inclusion of finely ground palm oil fuel ash contributes towards densification of concrete microstructure through formation of secondary C-S-H gel by pozzolanic reaction and filling effect.
| Item Type: | Conference or Workshop Item (Lecture) |
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| Uncontrolled Keywords: | OPS Lightweight aggregate concrete; palm oil fuel ash; partial cement replacement; sulphate resistance; concrete properties |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Faculty/Division: | Faculty of Civil Engineering & Earth Resources Institute of Postgraduate Studies |
| Depositing User: | Dr. Khairunisa Muthusamy |
| Date Deposited: | 10 Oct 2016 03:13 |
| Last Modified: | 16 Oct 2019 08:28 |
| URI: | http://umpir.ump.edu.my/id/eprint/14600 |
| Download Statistic: | View Download Statistics |
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