Impact of Elevated Temperature and Salt Solutions on Mechanical Strength of Geopolymer Concrete
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DOI:
https://doi.org/10.5281/zenodo.14188638Keywords:
Geopolymer, Recycled Aggregates, Elevated Temperature, Compressive Strength, Flexural StrengthAbstract
This study examines the durability of recycled aggregate geopolymer concrete (GC) made with
metakaolin (MK) and fly ash (FA) under sulfate and salt exposure following high-temperature conditions.
Five FA-based GC mixtures with varying MK contents were prepared, cured at 90C for 72 hours, then
exposed to temperatures ranging from 200-800C. Afterward, samples were immersed in 5% sodium sulfate
(SS) and 5% sodium chloride (SC) solutions for 30 days. MK improved compressive strength, with a
37.49% loss at 200C and only 3.22% loss at 400C + SS, while enhancing flexural strength. These results
underscore MK's role in enhancing durability and mechanical properties.
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