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Title: Geopolymer Flat Slabs with Synthetic Coarse Aggregate under Punching

Author(s): Eloisa Azevedo, Dênio Oliveira, Aaron Nzambi

Publication: Structural Journal



Appears on pages(s):

Keywords: flat slabs; geopolymer; punching; synthetic aggregate

DOI: 10.14359/51740573

Date: 2/14/2024

This paper experimentally analyzed the behavior of steel fibers reinforced geopolymer with red mud synthetic coarse aggregates. Eight flat slabs were manufactured and subjected to symmetrical punching tests until failure. The results were compared with the estimates of the prescriptions of seven models in the literature. The results show a considerable increase in the punching shear capacity in the group with steel fiber addition; the strength gains in steel fiber reinforcement concrete were 9% and 36% for natural and synthetic aggregates, respectively, and 3% and 27% in geopolymer-reinforced concrete. However, the highlight of the post-peak behavior improvement was with the geopolymer concrete, while the slabs with synthetic aggregate showed similar behavior to conventional concrete slabs, and the theoretical models showed satisfactory predictions in favor of safety and can be applied to geopolymer concrete.