Mechanical Properties of FRP-Confined Phosphogypsum Based Geopolymer
WANG Yongrui
CHEN Bing
Abstract：Phosphogypsum and slag were used as the primary infill in the preparation of FRP-confined phosphogypsum based geopolymer.Through compressive strength experiments of 21 specimens,the effects of fiber-reinforced polymer(FRP)layers,alkali activator dosage,phosphogypsum dosage,fly ash dosage,and calcium content in fly ash on the compressive strength and stress-strain relationship of the specimens were investigated.The results indicate that the compressive strength of specimens confined with one layer and two layers of FRP is approximately 6 times and 9 times those of unconfined specimens,respectively.Incorporating a small amount of low-calcium fly ash significantly enhances the strength of unconfined components,while a small amount of high-calcium fly ash improves the strength of confined components.Furthermore,external confinement suppresses the efflorescence issues in the geopolymer,preventing strength loss.
Keywords：phosphogypsumgeopolymerfiber-reinforced polymer(FRP)compressive strengthstress-strain relationship
Publication Date：2025-05-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 458-464 )