FRP bar properties - Reinforced Concrete with FRP Bars: Mechanics and Design - page 50

(b) Corner insert (g) Yo ke

(b) Corner insert

(a) Upper part

(d) Lower part

FRP bar

(f ) Chuck

(F) Chuck

(a) (b)

(c)

Figure 3.14 (a) Typical test setup; (b) assembled test fixture sketch; (c) typical failure
mode of a bent GFRP.

determined by chemical matrix digestion, in which the matrix is chemically
dissolved and the fibers weighed and calculated from substituent weights
and densities.
A different test method is generally used to measure the fiber content.
The reference is the ASTM D 2583, “Standard test method for ignition loss
of cured reinforced resins.” This test allows determining the ignition loss
(or resin content) and the reinforcement content of the cured reinforced
resin by heating a bar sample at 1500°F (815°C). What remains of a GFRP
bar sample at the end of the test is shown in Figure 3.15.