Document Type

Conference Proceeding

Publication Date

2018

Publisher

13th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures

Source Publication

American Concrete Institute

Source ISSN

9781510882294

Abstract

The bond between external bonding (EB) of fiber reinforced polymer (FRP) composite materials to concrete is the weakest link in the strengthened concrete flexural members. There are three mechanisms to transfer the interfacial shear between FRP and the concrete substrate, i.e., adhesion, interlocking and friction. This paper proposes a new approach by grooving on the concrete surface before applying epoxy to make epoxy ribs to increase interlocking. An experimental program was conducted to verify the effectiveness of the proposed epoxy ribs. Six grooves perpendicular to the fiber direction were cut on the bonding surface of the concrete blocks. The grooves were filled by wax in the unfilled specimens and with epoxy primer in the epoxy filled specimens before CFRP plate was installed. The experimental results show that epoxy-filled grooves can significantly improve the bond between FRP and concrete.

Comments

Published version. 13th International Symposium on Fiber-Reinforced Polymer Reinforcement for Concrete Structures (2018): 401-413. Publisher link. © 2018 American Concrete Institute. Used with permission.

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