Investigation into the Impact of Graphene Oxide (GO) on Microstructural Characteristics in Geopolymer Composites Derived from Fly Ash

Abstract:

This work reports on the effect of adding GO on the microstructural properties of fly ash-based geopolymer-GO composites. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier Transform Infrared (FTIR) tests were performed to investigate microstructural properties of fly ash-based geopolymer-GO composites. The XRD data showed that the intensity of the peaks in the fly ash-based geopolymer-GO composites increase with increasing the amount of the GO composition, which indicates the quartz phase (SiO₂) remained in crystal form. Fourier Transform Infrared (FTIR) data showed that the presence of GO absorption bands indicates the successful inclusion of GO into the geopolymer matrix/network, which affected the microstructural development of fly ash-based geopolymer-GO composites. In addition, the SEM images reveal that fly ash's diameter decreased up to the GO content of 1 gram, and the matrix was denser, which will increase the strength of the fly ash-based geopolymer-GO composites. While adding larger than 1 gram (e.g., 2 grams) of GO results in a bigger diameter of fly ash with the coarser matrix, which will decrease the strength of the fly ash-based geopolymer-GO composites.

• Periodical: Advances in Science and Technology (Volume 141)
• Pages: 55-61
• DOI: https://doi.org/10.4028/p-VS0Pc9
• Online since: March 2024
• Authors: Agus Susanto*, Abdul Haris, Muhammad Saleh
• Keywords: Composites, Fly Ash, Geopolymer, Graphene Oxide (GO), Mechanical Properties

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