Effect of Common Surface Pretreatments on Shear Strength of Bonded Concrete Overlays

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Title: Effect of Common Surface Pretreatments on Shear Strength of Bonded Concrete Overlays

Author(s): Andrew S. Pultorak and Frederick R. Rutz

Publication: Concrete International

Volume: 40

Issue: 12

Appears on pages(s): 55-60

Keywords: bond, substrate, bonding agent, moisture

Date: 12/1/2018

Abstract:
Concrete repairs frequently involve placing a new concrete surface (overlay) on existing concrete (substrate). In this study, pull-off, direct shear, and jacking tests were used to evaluate the bond of overlays applied to mechanically roughened and cleaned substrates. Test parameters included substrate moisture condition and the use of cement slurry bonding agent.