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July 2, 2026Case Studies in Construction MaterialsOpen Access

Compressive self-sensing characteristics and mechanism of UHPC with hybrid steel fiber subjected to combined curing

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Authors

GZGui ZhangGPGai-Fei PengXNXu-Jing Niu

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Overview

Randomized trial investigates self-sensing capabilities in UHPC under combined curing, suggesting improved high-temperature performance.

Key Points

  • This study aims to explore the self-sensing characteristics and mechanisms of hybrid steel fiber reinforced UHPC under combined curing conditions.
  • Five UHPC mixtures were prepared: reference with 2 vol.% steel fibers and four with 1 vol.% copper-coated fibers of varying aspect ratios.
  • Combined curing involved 90 °C hot water for 2 days followed by 200 °C dry-air heating for 3 days.
  • Cyclic loading tests evaluated self-sensing capabilities and compressive strength.
  • All UHPC mixtures achieved compressive strengths above 226 MPa, with a maximum of 248.8 MPa.
  • UHPC with 15 mm/0.2 mm fibers showed the best self-sensing capability, with FCR peak values of −52.5% in single-stage and −57.9% in three-stage cycles at 60 MPa.
  • A three-stage model for FCR evolution was proposed, introducing an ISE for damage warning.

Cite This Study

Zhang et al. (2026) studied this question.

synapsesocial.com/papers/6a45fef89ed134303130f95dhttps://doi.org/10.1016/j.cscm.2026.e06282
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