Strength and Microstructural Performance of Nano-SiO₂ Gel (NSG) Infused Alkaline Activated Ground Blast Furnace Slag-Ultrafine Palm Oil Fuel Ash (AAGU) Based Mortar

Abstract:

The aim of this paper is to study the performance of infused nanoSiO₂ gel (NSG) on the developed alkaline activated binary blending of ground blast furnace slag (GBFS) and ultrafine palm oil fuel ash (UPOFA) based mortar (AAGU) using the constant mass of combined activators (10 M NaOH_aq+Na₂SiO_3aq (Ms = SiO₂/Na₂O=3.3)). The methods include using the 3-day compressive strength results and microstructural characterization (SEM+EDX and FTIR). The finding revealed that the compressive strength of the mortar increased with NSG and the maximum strength achieved was 57.3 MPa signifying 21% strength gain compared to NSG-free sample. The NSG also played the role of microcracks and pore fillings, increased the product homogeneity and reduced its amorphousity due to silicate re-organization but has no effects on Si-Al substitution.

• Periodical: Advanced Materials Research (Volume 856)
• Pages: 280-284
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.856.280
• Online since: December 2013
• Authors: Moruf Olalekan Yusuf, Megat Azmi Megat Johari, Zainal Arifin Ahmad, Mohammed Maslehuddin
• Keywords: Compressive Strength, FTIR, GBFS, Nano-Silica, Pofa, SEM+EDX

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