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Steel fiber-reinforced ultra-high-performance concrete incorporating a slag-limestone powder binder functions as a highly fracture-resistant structural composite characterized by exceptional compressive strength, pronounced tensile strain-hardening, and high impact energy absorption. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

September 8, 2026SciOpen Access

Fracture-Controlled Mechanical Behavior of Steel Fiber-Reinforced Ultra-High-Performance Concrete Incorporating Slag and Limestone Powder Under Static and Impact Loading

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Authors

RNRoz‐Ud‐Din NassarAmerican University of Ras Al Khaimah ABAnagi BalachandraUniversity of Michigan SRShah RoomUniversity of West London

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Implication

Experimental study demonstrates high ductility and impact resistance in slag-limestone ultra-high-performance concrete, highlighting robust crack bridging across diverse loading conditions.

Key Points

To evaluate the mechanical behavior, fracture resistance, and energy dissipation of steel fiber-reinforced ultra-high-performance concrete incorporating a slag-limestone binder under static and impact loading.
Formulated ultra-high-performance concrete using a slag and limestone powder binder system, a water-to-binder ratio of 0.15, steel fibers, and 48-hour steam curing at 90 °C.
Evaluated compressive strength, flexural performance, split tensile response, direct tensile behavior, specimen size effects, and ultrasonic pulse velocity.
Conducted drop-weight impact testing to assess dynamic energy absorption capacity and resistance to catastrophic fragmentation.
Mean compressive strengths reached approximately 209 MPa at 7 days and 218 MPa at 28 days in standard cylinders, while smaller cube specimens attained 221 MPa and 227 MPa, respectively.
Direct tensile tests demonstrated a ductile strain-hardening response with strengths exceeding 10.9 MPa and strain capacities of 0.25–0.30%, while split tensile strength reached ~16.1 MPa and flexural strength averaged 33.1 MPa.
Drop-weight impact loading resulted in energy absorption exceeding 40 J without catastrophic fragmentation, accompanied by an average ultrasonic pulse velocity of 5344 m/s.

Cite This Study

Nassar et al. (2026) studied this question.

synapsesocial.com/papers/6a9fd7b758e84d0ff5b469d9 https://doi.org/10.3390/sci8090248

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Implication

Experimental study demonstrates high ductility and impact resistance in slag-limestone ultra-high-performance concrete, highlighting robust crack bridging across diverse loading conditions.

Fracture-Controlled Mechanical Behavior of Steel Fiber-Reinforced Ultra-High-Performance Concrete Incorporating Slag and Limestone Powder Under Static and Impact Loading

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Implication

Key Points

Cite This Study

Fracture-Controlled Mechanical Behavior of Steel Fiber-Reinforced Ultra-High-Performance Concrete Incorporating Slag and Limestone Powder Under Static and Impact Loading

Discussion

Member takes

Implication

Key Points

Cite This Study

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