A Study on the Effect of Temperature Variations on the Bonding of Concrete Overlays

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Title: A Study on the Effect of Temperature Variations on the Bonding of Concrete Overlays

Author(s): M.P. Dhir

Publication: Journal Proceedings

Volume: 81

Issue: 2

Appears on pages(s): 172-179

Keywords: bond (concrete to concrete); bonding;insulation; concrete pavements;resurfacing; temperature; weatherproofing.

Date: 3/1/1984

Abstract:
Preventive strengthening of existing concrete pavements with bonded concrete overlays leads to economy. With the background observations of areas of loss of bond on some projects, this study was undertaken to assess the adverse effects of large temperature variations that occur when overlaying is done in intemperate weather. An insulation covering was used to try to counteract these weather effects. Panels were also overlaid in temperate environs with shear pegs and epoxy bonding for comparison. Temperature and bond strength data developed in interior, edge, and corner portions of panels in different cases are given. It is shown that areas of inadequate bond result along panel peripheries when concreting is done under large temperature variations. This can be effectively counteracted with the insulation covering.