TY - JOUR
T1 - Durability of glass fiber-reinforced polymer reinforcing bars in concrete environment
AU - Benmokrane, Brahim
AU - Wang, Peng
AU - Ton-That, Tan Minh
AU - Rahman, Habib
AU - Robert, Jean Francois
PY - 2002/8
Y1 - 2002/8
N2 - Accelerated aging tests are being conducted on more than 20 types of glass fiber-reinforced polymer (GFRP) reinforcing bars, which are produced from different combinations of constituent materials, manufacturing parameters, sizes and shapes, and surface coatings. The specimens are being subjected to various sustained tensile loading (22 to 68% of ultimate strength) in three types of alkaline environments: NaOH, simulated pore-water solution, and embedded in concrete. Time to rupture or residual strength, as applicable, have been determined. Additionally, stress corrosion mechanisms were evaluated by various microstructural analyses. The results showed clearly that alkaline ions and moisture could penetrate or diffuse through the resin (or through cracks and voids) to the interphases and the fibers. For GFRP bars embedded in moist concrete under various sustained stress levels, three types of stress corrosion mechanisms have been identified: stress dominated, crack propagation dominated, and diffusion dominated.
AB - Accelerated aging tests are being conducted on more than 20 types of glass fiber-reinforced polymer (GFRP) reinforcing bars, which are produced from different combinations of constituent materials, manufacturing parameters, sizes and shapes, and surface coatings. The specimens are being subjected to various sustained tensile loading (22 to 68% of ultimate strength) in three types of alkaline environments: NaOH, simulated pore-water solution, and embedded in concrete. Time to rupture or residual strength, as applicable, have been determined. Additionally, stress corrosion mechanisms were evaluated by various microstructural analyses. The results showed clearly that alkaline ions and moisture could penetrate or diffuse through the resin (or through cracks and voids) to the interphases and the fibers. For GFRP bars embedded in moist concrete under various sustained stress levels, three types of stress corrosion mechanisms have been identified: stress dominated, crack propagation dominated, and diffusion dominated.
KW - Bars
KW - Concrete
KW - Durability
KW - Fiber reinforced materials
KW - Glass fibers
UR - http://www.scopus.com/inward/record.url?scp=13844276880&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)1090-0268(2002)6:3(143)
DO - 10.1061/(ASCE)1090-0268(2002)6:3(143)
M3 - Article
AN - SCOPUS:13844276880
SN - 1090-0268
VL - 6
SP - 143
EP - 153
JO - Journal of Composites for Construction
JF - Journal of Composites for Construction
IS - 3
ER -