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Table 3 Properties of employed fibers (SF, and PPF) and steel rebars (according to the manufacturers)

From: Interfacial Shear Behavior of Composite Concrete Substrate to High-Performance Concrete Overly After Exposure to Elevated Temperature

Properties

Fibers

Steel reinforcement rebar

Steel (SF)

Polypropylene (PPF)

Main reinforcement

Stirrup

Length, (mm)

35

Gradient of 18

–

–

Diameter

0.8 (mm)

18 (μm)

10 mm

8 mm

Specific gravity

7.85

0.91

7.85

7.85

Shape

Hooked end

Fiber mesh

–

 

Tensile strength, (Mpa)

 ≥ 1000

300–400

360

360

Elastic modulus, (Gpa)

210

3.6

210

210

Melting point, (°C)

–

160 °C

–

–