Effect of Treated Sago Pith Waste Ash and Silica Fume to the Mechanical Properties of Fly Ash-Based Geopolymer Brick

Abstract:

This paper investigates the effect of partial replacement of fly ash with sago pith waste ash and silica fume in fabricating the geopolymer mortar concrete. The mixtures of geopolymer mortar concrete were prepared by replacing sago pith waste ash and silica fume at 5% of total weight of fly ash. There were six specimens of geopolymer mortar cubes and bricks fabricated in this study. The specimens are tested with compressive strength test, rebound hammer test and ultrasonic pulse velocity test. The results from the tests are compared with some existing published works as to clarify the effect of replacing the fly ash with sago waste and silica fume on the strength of concrete. Comparisons had been made and concluded that the molarity of alkaline solution, Al₃O₂ and CaO influenced the development of compressive strength along the curing time of fly ash based geopolymer concrete.

• Periodical: Key Engineering Materials (Volume 879)
• Pages: 100-114
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.879.100
• Online since: March 2021
• Authors: Izwan B. Johari*, Md Azlin Md Said, Mohd Amirul B. Mohd Snin, Nur Farah Aqilah Bt. Ayob, Nur Syafiqah Bt. Jamaluddin, Mohamad Rohaidzat Bin Mohamed Rashid
• Keywords: Brick, Fly Ash, Geopolymer Concrete, Sago Pith Waste, Silica Fume

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