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Research Article

Estimation of Long-Term Stiffness of Storage Aged GFRP Composite Samples Immersed in HCl Acid by TTSP Method

Table 4

Experimental modulus of elasticity of the nonacid immersed samples.
Storage aged samples 𝐸 (MPa)
15-year aged ( 𝐸 0 )8130
15.5-year aged7200
16-year aged6800
16.5-year aged6250
17-year aged6400
17.5-year aged5950
18-year aged5550
18.5-year aged5400
19-year aged5150