Influence of MgO and Hybrid Fiber on the Bonding Strength between Reactive Powder Concrete and Old Concrete

Table 2

The properties of different fibers.

Code	Density/g/cm^3	Elasticity modulus/GPa	Tensile strength/MPa	Diameter/mm	Length/mm	Ductility/%
SF	7.8	200–220	2850	0.2–0.25	13	3-4
PPF	0.91	2.4–3.2	365–600	0.01	12	10–20