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August 23, 2026Journal of Materials in Civil Engineering

Effect of Curing Age and Fiber Dosage on High Strain Rate Compressive Behavior of Ultrahigh-Performance Concrete

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Authors

MMMuthuraja M.SPS. Suriya Prakash

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Overview

Experimental study demonstrates that steel fibers enhance early-age dynamic compressive behavior in ultrahigh-performance concrete, highlighting critical parameters for impact-resistant design.

Key Points

  • To evaluate the high-strain-rate compressive behavior, energy absorption, and failure mechanisms of ultrahigh-performance concrete across varying curing ages and steel fiber dosages.
  • Tested ultrahigh-performance concrete specimens containing 0%, 1%, and 2% volume fractions of steel fibers across curing ages of 1 to 56 days.
  • Applied dynamic compression at strain rates ranging from 40 to 170 s⁻¹ using a split Hopkinson pressure bar apparatus.
  • Performed fractal dimension analysis on postfailure fragment surfaces to assess crack branching and energy dissipation mechanisms.
  • Strain rate sensitivity decreased with advancing curing age due to reduced internal moisture and increased stiffness, while higher steel fiber dosages significantly improved dynamic performance.
  • Formulated and validated an empirical dynamic increase factor model integrating curing age, fiber content, and strain rate, yielding improved predictive capability.
  • Fractal dimension values rose with increasing strain rates and fiber volumes, corresponding to finer fragmentation patterns, greater crack branching, and superior dynamic toughness.

Cite This Study

M. et al. (2026) studied this question.

synapsesocial.com/papers/6a8aada77677a34114445f23https://doi.org/10.1061/jmcee7.mteng-23232
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  4. 4Effect of Curing Regimes and Fiber Contents on Flexural Behaviors of Milling Steel Fiber-Reinforced Ultrahigh-Performance Concrete: Experimental and Data-Driven Studies2024 · 10 citations
  5. 5Fracture-Controlled Mechanical Behavior of Steel Fiber-Reinforced Ultra-High-Performance Concrete Incorporating Slag and Limestone Powder Under Static and Impact Loading2026