Effect of Hydrodemolition and Cutting Diameter of Pull-off Test on the Bond Strength of LMC Bridge Deck Pavement

Abstract

Latex modified concrete (LMC) has many advantages against an ordinary Portland concrete. Hundreds of projects have been completed using LMC for overlay in Korea. A sound bond is an essential requirements of bridge deck pavements, and the bond property of a bonded overlay to its substrate concrete during the life-time is one of the most important performance requirements. This paper compare and evaluate the effect of the hydrodemolition and cutting diameter of the pull-off test into the bond strength of latex-modified concrete overlay by a series of experimental variables. The concrete surface preparation methods included hydrodemolition, cold milling and jack hammer. The core cutting diameters of pull-off test included four levels: 50, 75, 100 and 150 mm.