Bond of Epoxy-Coated Reinforcement: Coefficient of Friction and Rib Face Angle | Zendy

Emmanuel K. Idun | Zendy; David Darwin | Zendy

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Bond of Epoxy-Coated Reinforcement: Coefficient of Friction and Rib Face Angle

Author(s) -

Emmanuel K. Idun,

David Darwin

Publication year - 1999

Publication title -

aci structural journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.952

H-Index - 109

eISSN - 1944-7361

pISSN - 0889-3241

DOI - 10.14359/698

Subject(s) - reinforcement , epoxy , face (sociological concept) , composite material , structural engineering , bond , materials science , friction coefficient , forensic engineering , engineering , social science , finance , sociology , economics

The coefficients of friction between epoxy-coated and uncoated reinforcing steel and mortar and the effects of rib face angle on the relative bond strength of epoxy-coated bars are determined. Results for 130 test specimens indicate that the average coefficient of friction is approximately 0.49 between epoxy-coated reinforcing steel and mortar and approximately 0.56 between uncoated unreinforcing steel and mortar. Based on 58 beam-end specimen tests using both machined and rolled 1-in (25-mm) nominal diameter reinforcing bars with face angles of 30 deg (0.525 rad), 40 deg (0.7 rad), 45 deg (0.7875 rad), 60 deg (1.05 rad), and 90 deg (1.575 rad), epoxy coating has the least effect on the bond strength of steel reinforcing bars to concrete when the rib face angle is greater than or equal to 45 deg (0.7875 rad).

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