Title:
Post-Creep Compressive Behavior of Basalt Fiber-Reinforced Geopolymer Concrete under Different Stress-Strength Ratios (Prepublished)
Author(s):
Xianyu Zhou, Guohao Zhao, Yusheng Zeng, Zhenzhen Jiao and Tianming Miao
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
basalt fiber; ground granulated blast furnace slag; post-creep failure; stress–strength ratio
DOI:
10.14359/51751922
Date:
8/14/2026
Abstract:
Applying geopolymer concrete to replace conventional Portland cement reduces CO2 emissions. Investigating the post‑creep failure behavior of geopolymer concrete is of significant engineering relevance for improving theoretical design methods and enhancing durability and safety. Therefore, this study is conducted under stress-strength ratios of 0.3, 0.45, and 0.6. It includes 18 groups of post-creep failure tests on geopolymer concrete reinforced with basalt fiber. The concrete incorporates six different fiber parameters, including dosage and length. Plain geopolymer concrete exhibits a higher creep compaction threshold in terms of stress-strength ratio. Under an appropriate stress–strength ratio, increasing the stress–strength ratio enables fibers to develop a constraining effect, which in turn improves the post‑creep failure strength of geopolymer concrete. In contrast, when the stress-strength ratio is high, the hole effect induced by the fiber offsets their reinforcing action. The ductility and toughness of concrete after creep decrease continuously as the stress-strength ratio increases.