Performance of fiber-reinforced EAF slag concrete for use in pavements

- The performance of fiber-reinforced EAF slag concrete is evaluated.
- Mechanical tests on the fiber-reinforced EAF slag concrete showed good results.
- Metallic fibers provided better fracture toughness behavior than synthetic fibers.
- SEM analysis shows homogeneous concrete structures with good fiber adherence.

The manufacture of concrete with Electric Arc Furnace slag as aggregate is known; in this work, fiber reinforcements are added to this concrete. The properties of several mixes, reinforced with 0.6% metallic and 0.4% synthetic fibers in volume, are studied both in the fresh and in the hardened state. Mechanical characterization of the fiber-reinforced concretes showed that they had good compression, flexural and tensile splitting strength. They also showed good toughness, post-cracking behavior, impact strength and tests on their abrasion resistance yielded suitable results. The concrete mixtures were characterized with SEM, to analyze their microstructure and the adherence of fibers.

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