Effect of Adding Hydrogen Peroxide (H₂O₂) and Sodium Dodecyl Sulphate (SDS) to the Properties of Fly Ash (FA)-Based Geopolymer Mortar

Abstract:

Geopolymer is an alternative cementitious material produced by rich aluminosilicate mineral materials (Si-Al) combine with an alkaline activator. The objectives of this study are to study the effect of adding hydrogen peroxide (H₂O₂) and sodium dodecyl sulphate (SDS) as foaming and stabilizing agents, respectively to the fly ash (FA)-based geopolymer mortar properties. The geopolymer mortars were synthesized with a mixture of FA, alkaline activator and SDS with different H₂O₂ content. The geopolymer mortars were analyzed using compressive strength test, porosity test and Scanning Electron Microscopy (SEM) analysis. Geopolymer mortar with 1 wt% H₂O₂ content and 0.5 wt% SDS has the lowest compressive strength (8.67 N) compare to the other geopolymer mortar composition. As H₂O₂ content increase with presence of SDS, the formation of the pores also increased hence resulting in the low compressive strength of geopolymer mortar.

• Periodical: Key Engineering Materials (Volume 908)
• Pages: 658-663
• DOI: https://doi.org/10.4028/p-b9umsp
• Online since: January 2022
• Authors: Mohamad Abdul Zahari Aziz, A.Z. Norzeity, I. Johari, Shah Rizal Kasim*
• Keywords: Fly Ash, Foaming Agent, Geopolymer, Mortar, Pore Formation, Stabilizing Agent

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