Browsing by Author "Schlosser, Corey"

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    Alkali Leaching Properties of Waste Glass-Based Geopolymers
    (2018-01) Schlosser, Corey
    Geopolymers are a green alternative to portland cement (PC) due to the potential for a lower carbon footprint. Geopolymers possess many of the same properties as PC concrete, but differences in their unique chemistry could allow for use in specialized applications. This research investigated the effect of glass composition on the static leaching properties, compressive strength, and microstructure of waste glass-based geopolymers. Waste glass possesses high concentrations of amorphous silica; however, a lack of alumina and a high alkali content has been shown to result in moisture instability. 100% glass-based mortars were made to investigate the leaching properties of these geopolymers. Glasses with a lower Na/Al molar ratio showed reduced alkali leaching with minimal strength loss. Supplemental alumina, calcia, and sodium silicate sources were introduced into the mixtures to mitigate leaching and improve strength. Mixtures with a Na/Al ~ 2 leached out less Na+ and had a lower strength loss.