BOND IMPROVEMENTS OF GFRP BARS EMBEDDED IN NORMAL
AND HIGH STRENGTH CONCRETE
33rd Our World in Concrete and Structures (OWICs) - 2008
Khaled S Ragab*, Housing and Building National Research Center, Cairo, Egypt
S I Zaki, Housing and Building National Research Center, Cairo, Egypt
Bond behavior, ribbed, sand coated and smooth GFRP bars, pull out test , high-strength
This paper concerns the bond performance of Glass-fiber- reinforced polymer
GFRP bars embedded in normal and high strength concretes by the proposed
concentric pullout test , where identical specimens with high grade steel (HGS) bars
were used for comparison.
The bond performance including the mode of failure and bond strength was
studied with varying surfaces treatment of the GFRP bars . The effect of short
polypropylene fibers on the bond of GFRP bars was studied . Also, the effect of copolymer based bonding agent was studied .
The results showed that bond strength of GFRP bars can be improved if
ribbed bars were used in high strength concrete.
The results indicated also that bond strength can be improved if short
polypropylene fibers was added to concrete mix.