Impact of steel fiber mimicry on the corrosion resistance of concrete
C60 concrete is a crucial material commonly used in wellbore wall construction,which is susceptible to the com-plex and varying external loads and the coupled effect of sulfate erosion in certain geological formations.These factors can lead to damage and cracking of the concrete material in wellbore walls,posing safety risks.Our study focuses on C60 con-crete and conducts uniaxial compression tests with varying steel fiber dosages under different dry-wet cycle conditions to in-vestigate the rock mechanics behavior of concrete specimens.The study also calibrates microscopic mechanical parameters using the PFC2D software and further explores the impact of steel fiber dosages on the service life of concrete by establishing a peak strength prediction model.The results indicate the following:simulating coarse aggregates using the Clump command and modeling uniaxial compression tests with the linear parallel bond model align with the mechanical behavior observed in laboratory experiments,providing reliable reference values;with increased corrosion,concrete specimens with a 1.0％steel fiber dosage exhibit the smallest fluctuations in peak stress-strain and the most gradual decrease in compressive strength cor-rosion resistance coefficient;results from the GM(1,1)peak strength prediction model show that the service life of concrete with a 1.0％steel fiber dosage is significantly better than other groups,consistent with numerical simulation results.The findings of the research can serve as a theoretical reference for evaluating the quality of rock engineering related to corro-sion-resistant concrete.
mine constructionshaft wall damagesteel fiber mimicryhigh-performance concretecorrosion test
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