Effects on Characteristics of the SiO2-to-Na2O Ratio on Nano-SiO2 Metakaolin-Based Geopolymers

Kae Long Lin; Kang Gao; De Ying Wang; Kang Wei Luo; Wen Hsuan Chang; Dian Yi Huang; Hui Cheng; Rong Cui

doi:10.4028/www.scientific.net/AMR.936.434

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 936Effects on Characteristics of the SiO2-to-Na2O...

Effects on Characteristics of the SiO₂-to-Na₂O Ratio on Nano-SiO₂ Metakaolin-Based Geopolymers

Abstract:

This study explores the effects of the SiO₂/Na₂O molar ratio (1.0-2.0) on the properties of 1% nanoSiO₂ metakaolin-based geopolymers. The porosity, flexural strength, DTA/ TGA, and NMR are investigated to study the mechanical and microstructure properties of the geopolymers. The results show that the flexural strength increased, and that the products of geopolymerization filled pores with curing time, causing the microstructure to become denser. Moreover, a nanoSiO₂ metakaolin-based geopolymer sample with a SiO₂/Na₂O ratio of 1.5 exhibited more strength and less porosity. Applying the 1% nanoSiO₂to a geopolymer enhances compactness, improves uniformity, and increases strength.

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Periodical:

Advanced Materials Research (Volume 936)

Pages:

434-438

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.936.434

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Online since:

June 2014

Authors:

Kae Long Lin*, Kang Gao, De Ying Wang, Kang Wei Luo, Wen Hsuan Chang, Dian Yi Huang, Hui Cheng, Rong Cui

Keywords:

Geopolymer, Metakaolin (MK), Microstructure, Nano-SiO₂, SiO₂/Na₂O Molar Ratio

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