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Table 4 Properties of fibers.

From: Control of Tensile Behavior of Ultra-High Performance Concrete Through Artificial Flaws and Fiber Hybridization

Type of fiber

Diameter (μm)

Length (mm)

Tensile strength (MPa)

Density (g/cm3)

Elastic modulus (GPa)

Steel

200

16.3, 19.5

2500

7.8

200

PE

12

18

2700

0.97

88