Strength and Microstructure Characteristics of Metakaolin-Based Geopolymer Mortars with High Water-to-Binder Ratios
نویسندگان
چکیده
Geopolymers and other alkali-activated materials were investigated in detail as alternatives to ordinary Portland cement because of their reduced CO2 emissions, high (radionuclide) binding capacities, low permeabilities. The last two properties make them potential for the immobilization several types chemical waste. In this context, direct liquid waste streams would be a useful application. This study aimed develop geopolymers with water-to-binder ratios, but good mechanical strengths, while elucidating parameters that dictate strengths. Three metakaolin geopolymer recipes cast cured 28 days, after which mineralogy, microstructures determined. results show it is possible attain acceptable strengths at ratios vary from 0.75 0.95, significant increase ratio 0.55 commonly used literature. It was found most important parameter governs strength dilution activating solution, represented by H2O/Na2O ratio, microstructure benefit SiO2/Al2O3 ratio.
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ژورنال
عنوان ژورنال: Sustainability
سال: 2022
ISSN: ['2071-1050']
DOI: https://doi.org/10.3390/su14063141