Mechanical performance of modified cement paste made with micro-fine POFA in ammonium nitrate environment

Sadia, Tasnim and Muhammad Ekhlasur, Rahman and Raudhah, Ahmadi (2018) Mechanical performance of modified cement paste made with micro-fine POFA in ammonium nitrate environment. Construction and Building Materials, 162. pp. 534-542. ISSN 09500618

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Abstract

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. © 2017 Elsevier Ltd

Item Type: Article
Uncontrolled Keywords: Modified cement paste, Ammonium nitrate, Palm fuel ash, Compressive, Micro-structure, Pozzolanic, unimas, university, universiti, Borneo, Malaysia, Sarawak, Kuching, Samarahan, ipta, education, research, Universiti Malaysia Sarawak.
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Academic Faculties, Institutes and Centres > Faculty of Engineering
Depositing User: Ibrahim
Date Deposited: 14 Feb 2018 04:43
Last Modified: 29 May 2021 06:01
URI: http://ir.unimas.my/id/eprint/19570

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