International Journal of Concrete Structures and Materials

Table 2 Properties of fibres.

From: Crack Propagation Analysis of Synthetic vs. Steel vs. Hybrid Fibre-Reinforced Concrete Beams Using Digital Image Correlation Technique

Properties↓ \ Fibre type→	Polyolefin (synthetic)	Steel
Tensile strength	618 MPa	1000 MPa
Modulus of elasticity	10 GPa	200 GPa
Specific gravity	0.91	7.85
Diameter	0.5 mm	0.6 mm
Length	50 mm	30 mm
Aspect ratio	100	50
Density	910 kg/m³	7850 kg/m³

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