Compressive strength and microstructural analysis of fly ash/palm oil fuel ash based geopolymer mortar |
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| Affiliation: | 1. Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Department of Mechanical Engineering and Centre of advanced Material, University of Malaya, 50603 Kuala Lumpur, Malaysia;1. School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia;2. Civil Engineering Department, Faculty of Engineering, Al-Merghab University, Al-Khums, Libya;3. Structural Materials Niche Area, School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia;1. Department of Civil Engineering, Jadavpur University, Kolkata 700032, India;2. Department of Physics, Jadavpur University, Kolkata 700032, India;1. Institute for Smart Infrastructure and Innovative Construction, Faculty of Civil Engineering, Universiti Teknologi Malaysia, Skudai, Johor Bahru, Malaysia;2. Department of Materials Science, Research Institute of Hydro-Quebec, 1800 Mte Ste. Julie, Varennes, Quebec, J3X 1S1, Canada;3. Faculty of Civil Engineering, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia;4. Department of Building, School of Design and Environment, National University of Singapore, Singapore 117566, Singapore;1. Department of Civil Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;2. Centre for Innovative Construction Technology, Department of Civil Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia;3. School of Mechanical and Building Sciences, VIT University, India;1. School of Civil Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia;2. Structural Materials Niche Area, School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia;3. Center for Engineering Research Institute, Research Institute, King Fahd University of Petroleum and Minerals, 31261 Dhahran, Saudi Arabia |
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| Abstract: | This paper presents the effects and adaptability of palm oil fuel ash (POFA) as a replacement material in fly ash (FA) based geopolymer mortar from the aspect of microstructural and compressive strength. The geopolymers developed were synthesized with a combination of sodium hydroxide and sodium silicate as activator and POFA and FA as high silica–alumina resources. The development of compressive strength of POFA/FA based geopolymers was investigated using X-ray florescence (XRF), X-ray diffraction (XRD), Fourier transform infrared (FTIR), and field emission scanning electron microscopy (FESEM). It was observed that the particle shapes and surface area of POFA and FA as well as chemical composition affects the density and compressive strength of the mortars. The increment in the percentages of POFA increased the silica/alumina (SiO2/Al2O3) ratio and that resulted in reduction of the early compressive strength of the geopolymer and delayed the geopolymerization process. |
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| Keywords: | Geopolymer Fly ash Compressive strength Palm oil fuel ash Microstructure |
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