TY - JOUR
T1 - Effect of surface condition on the bond of Basalt Fiber-Reinforcement Polymer bars in concrete
AU - Henin, E.
AU - Tawadrous, Raed
AU - Morcous, George
N1 - Funding Information:
The authors would like to than NEUVOKAS CORP. for providing the BFRP bars used in this study. The technical and financial support of NEUVOKAS CORP . is also acknowledged.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/11/30
Y1 - 2019/11/30
N2 - Basalt fiber reinforced polymer (BFRP) bars are used in reinforced concrete structures as an alternative to conventional mild steel bars due to their excellent strength and durability properties. The bond of BFRP bars with concrete is a critical design criterion for both flexural strength and crack control. In this paper, the effect of two surface conditions (primary sand coating and secondary sand coating) on the bond of BFRP bars is evaluated experimentally in three investigations: first, twelve pull-out specimens (six specimens for each surface condition) are tested to determine the bond strength; second, eleven beams (three beams with primary sand coated BFRP bars, three beams with secondary sand coated BFRP bars, three beams with bundled BFRP bars, and two beams with mild steel bars) are tested to determine the bond-dependent coefficient (kb) of different surface conditions compared to that of deformed steel bars; third, eleven beams are tested in flexure to determine the ultimate flexural strength and failure modes of beams with different surface conditions and reinforcement ratios. It was observed that the surface condition of BFRP bars has significant effect on bond strength, kb, and flexural strength. Test results are compared to those predicted using ACI 440-15 and ISIS 2007, which found to be conservative.
AB - Basalt fiber reinforced polymer (BFRP) bars are used in reinforced concrete structures as an alternative to conventional mild steel bars due to their excellent strength and durability properties. The bond of BFRP bars with concrete is a critical design criterion for both flexural strength and crack control. In this paper, the effect of two surface conditions (primary sand coating and secondary sand coating) on the bond of BFRP bars is evaluated experimentally in three investigations: first, twelve pull-out specimens (six specimens for each surface condition) are tested to determine the bond strength; second, eleven beams (three beams with primary sand coated BFRP bars, three beams with secondary sand coated BFRP bars, three beams with bundled BFRP bars, and two beams with mild steel bars) are tested to determine the bond-dependent coefficient (kb) of different surface conditions compared to that of deformed steel bars; third, eleven beams are tested in flexure to determine the ultimate flexural strength and failure modes of beams with different surface conditions and reinforcement ratios. It was observed that the surface condition of BFRP bars has significant effect on bond strength, kb, and flexural strength. Test results are compared to those predicted using ACI 440-15 and ISIS 2007, which found to be conservative.
KW - Basalt fiber reinforced polymer
KW - Bond strength
KW - Bond-dependent coefficient
KW - Concrete beams
KW - Flexural strength
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U2 - 10.1016/j.conbuildmat.2019.07.160
DO - 10.1016/j.conbuildmat.2019.07.160
M3 - Article
AN - SCOPUS:85069938894
SN - 0950-0618
VL - 226
SP - 449
EP - 458
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -