Constituent Materials and Properties - Strengthening Design of Reinforced Concrete with FRP - page 64

TABLE 3.13
Range of Typical Tensile Properties for FRP Considering Three Laminate Lay-Ups with Fiber Volumes of 40%-60%

Young's Modulus Ultimate Tensile Strength

FRP System Description
(Fiber Orientation) a

Rupture Strain
at 0°, %

Property at 0°, Property at 90°, Property at 0°, Property at 90°,

10 3 ksi (GPa) 10 3 ksi (GPa) ksi (MPa) ksi (MPa)

High-Strength Carbon/Epoxy

0° 15 to 21 (100 to 140) 0.3 to 1 (2 to 7) 150 to 350 (1020 to 2080) 5 to 10 (35 to 70) 1.0 to 1.5

0°/90° 8 to 11 (55 to 76) 8 to 11 (55 to 75) 100 to 150 (700 to 1020) 100 to 150 (700 to 1020) 1.0 to 1.5

+45°/-45° 2 to 4 (14 to 28) 2 to 4 (14 to 28) 25 to 40 (180 to 280) 25 to 40 (180 to 280) 1.5 to 2.5

E-Glass/Epoxy

0° 3 to 6 (20 to 40) 0.3 to 1 (2 to 7) 75 to 200 (520 to 1400) 5 to 10 (35 to 70) 1.5 to 3.0

0°/90° 2 to 5 (14 to 34) 2 to 5 (14 to 35) 75 to 150 (520 to 1020) 75 to 150 (520 to 1020) 2.0 to 3.0

+45°/-45° 2 to 3 (14 to 21) 2 to 3 (14 to 20) 25 to 40 (180 to 280) 25 to 40 (180 to 280) 2.5 to 3.5

High-Performance Aramid/Epoxy

0° 7 to 10 (48 to 68) 0.3 to 1 (2 to 7) 100 to 250 (700 to 1720) 5 to 10 (35 to 70) 2.0 to 3.0

0°/90° 4 to 5 (28 to 34) 4 to 5 (28 to 34) 40 to 80 (280 to 550) 40 to 80 (280 to 550) 2.0 to 3.0

+45°/-45° 1 to 2 (7 to 14) 1 to 2 (7 to 14) 20 to 30 (140 to 210) 20 to 30 (140 to 210) 2.0 to 3.0

Source: Courtesy of ACI 440.2R-08.
Notes: FRP composite properties are based on FRP systems having an approximate iber volume of 50% and a composite thickness of 0.1 in. (2.5 mm). In
general, FRP bars have iber volumes of 50%-70%. Precured systems have iber volumes of 40%-60%, and wet lay-up systems have iber volumes of
25%-40%. Because the iber volume inluences the gross laminate properties, precured laminates usually have higher mechanical properties than lami-
nates created using the wet lay-up technique.
a Zero degrees represents unidirectional iber orientation. Zero/90° or +45°/-45° represent iber balanced in two orthogonal directions, where 0° is the direc-
tion of loading, and 90° is normal to the direction of loading. Tension is applied to 0° direction. All FRP bar properties are in the 0° direction.