Table 6.

Advantages and disadvantages of steel and FRP tendons.

Type of Tendon	Advantages	Disadvantages
CFRP	1Compared to other FRP it has the maximum strength 2High resistance to elevated temperature 3Moisture, acid, and solvent resistance at normal temperature 4Cheaper than other FRP	1The production process and techniques associated with CFRP composites are comparatively complicated. 2CFRP tendons are more costly than steel tendons
GFRP	1They are corrosion resistance 2They don't have any kind of metal so they are not magnetic materials 3They don't rust 4GFRP rebars are lighter than steel rebars	1They have poor rigidity 2Their stiffness is low 3At a temperature over 300 °C their application is limited.
AFRP	1Low flammability 2Perfect resistance to heat 3Low electrical conductivity 4High resistance to organic solvents	1Their compression resistance is low 2Under UV they will degrade 3Low absorption of moisture 4Weak adhesion of the resins 5Their production cost is high
BFRP	1Rust-proof and non-corrosive 2Sustainable 3The tensile strength of the BFRP tendons is 2.5 times greater than steel tendons while their weight is 4 times lighter than steel tendons 4Durability performance	1They have higher density compared to other FRP composite 2Their production cost is usually higher than other FRP materials.
Steel Tendons	1High impact load resistance 2Their ductility is extreme 3They have the same coefficient of thermal expansion as concrete. 4The resistance capacity of steel materials is high against rough conditions. 5They have a high MoE. 6Without any problem, steel can be recycled.	1Steel is a heavy-weight material. 2Steel is a corrosive material, especially when in contact with water or air. 3They also have the potential to rust and therefore the strength of RC will reduce. 4Steel has a sensitivity to melt in badly high temperatures. Because of this, the steel is bound and not welded.