WAN MASTURA WAN IBRAHIM, MOHD MUSTAFA AL BAKRI ABDULLAH, ANDREI VICTOR SANDU, KAMARUDIN HUSSIN, IOAN GABRIEL SANDU, KHAIRUL NIZAR ISMAIL, AESLINA ABDUL KADIR, MOHAMMED BINHUSSAIN <br>Processing and Characterization of Fly Ash-Based Geopolymer Bricks

WAN MASTURA WAN IBRAHIM, MOHD MUSTAFA AL BAKRI ABDULLAH, ANDREI VICTOR SANDU, KAMARUDIN HUSSIN, IOAN GABRIEL SANDU, KHAIRUL NIZAR ISMAIL, AESLINA ABDUL KADIR, MOHAMMED BINHUSSAIN
Processing and Characterization of Fly Ash-Based Geopolymer Bricks

Abstract:

Utilization of fly ash as a raw material for geopolymer brick production seems to be a logical solution that allows for the conservation of natural resources, abates further pollution and preserves the environment. Fly ash-based geopolymer have been studied by several researchers worldwide for several decades due to their excellent mechanical properties. This study has been conducted to produce fly ash-based geopolymer bricks by means of pressure forming without firing procedure and low energy consumptions. The experiments were conducted on fly ash-based geopolymer bricks by varying the ratio of fly ash-to-sand (1:2 - 1:5, by mass of ratio), curing time (1 - 24 h) and curing temperature (room temperature - 80°C). Compressive strength up to 20.3 MPa was obtained by curing at 70 °C for a period of 24 hours at 60 days of ageing. The density of geopolymer bricks ranged between 1800 Kg/m3 to 1950 Kg/m3. The microstructure properties of fly ash-based geopolymer bricks were investigated by using XRD and SEM analysis. Keywords: fly ash, bricks, geopolymer, mechanical properties, microstructure

Issue: 2014, Volume 65, Issue 11

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