Commenced in January 2007
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Edition: International
Paper Count: 86323
Characteristics of Nanosilica-Geopolymer Nanocomposites and Mixing Effect
Authors: H. Assaedi, F. U. A. Shaikh, I. M. Low
Abstract:
This paper presents the effects of mixing procedures on mechanical properties of flyash-based geopolymer matrices containing nanosilica (NS) at 0.5%, 1.0%, 2.0%, and 3.0% by wt.. Comparison is made with conventional mechanical dry-mixing of NS with flyash and wet-mixing of NS in alkaline solutions. Physical and mechanical properties are investigated using X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). Results show that generally the addition of NS particles enhanced the microstructure and improved flexural and compressive strengths of geopolymer nanocomposites. However, samples prepared using dry-mixing approach demonstrate better physical and mechanical properties than wet-mixing of NS.Keywords: geopolymer, nano-silica, dry mixing, wet mixing, physical properties, mechanical properties
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