What is the difference between polypropylene and steel fibres?
Polypropylene fibres are mainly used to reduce the formation of shrinkage cracks in freshly poured concrete; steel fibres do more than that, although not as effective as polypropylene fibres in controlling early plastic shrinkage cracks which is due to lower fibre counts as compared to polypropylene fibres, steel fibres also improve concrete strength and durability at its hardened state. This is because of the relatively high modulus of elasticity and tensile strength of steel fibres that enable them to improve the structural properties of concrete that can be well-utilized in demanding SFRC structural applications.
