Mechanical performance of modified cement paste made with micro-fine POFA in ammonium nitrate environment
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© 2017 Elsevier Ltd An experimental study was conducted on modified cement paste cubes in ammonium nitrate solution. The modified cement paste was made using micro-fine palm oil fuel ash (POFA) as partial cement replacement. Compressive strength, Energy Dispersive X-ray (EDX) and a Scanning Electron Microscopy (SEM) test were carried out. The 50 mm cubes were cast containing 0%, 10%, 20% and 30% of POFA as cement replacement using constant water to cement ratio of 0.4. After 28 days of water curing, 50% of samples were immersed in 20% ammonium nitrate solution and the rest of samples were kept in room temperature. It was observed that, samples replaced with 20% POFA had the highest compressive strength in ammonium nitrate solution. In addition to that, it was also observed through EDX and SEM analysis that cement replaced with 20% POFA had lower Ca/Si ratio and there were more C-S-H structures in the modified cement paste in ammonium nitrate solution. Lower Ca/Si ratio and more C-S-H structures is an indication of higher pozzolanic reactions in the paste.
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Mechanical performance of modified cement paste made with micro-fine POFA in ammonium nitrate environmentTasnim, S.; Rahman, Muhammad; Ahmadi, R. (2018)© 2017 Elsevier Ltd An experimental study was conducted on modified cement paste cubes in ammonium nitrate solution. The modified cement paste was made using micro-fine palm oil fuel ash (POFA) as partial cement replacement. ...
Tasnim, Sadia (2017)The aim of this research is to study the performance of fine palm oil fuel ash (POFA) to control ammonium nitrate attack in cement paste. The mechanical, durability and micro-structural properties of the modified cement ...
Rajak, M.; Majid, Z.; Ismail, Mohamed (2015)© 2015 The Authors Recently, nano-sized additives and supplementary cementing materials (SCM) have shown to improve the mechanical and durability of mortars and concretes. This study investigates the incorporation of ...