Bond characteristics of substrate concrete and repair materials

Author(s): M.I. Khan, T.H. Almusallam, S.H. Alsayed, Y.A. Al-Salloum, A.A. Almosa
Paper category: Conference
Book title: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR)
Editor(s): M.G. Alexander, H.-D. Beushausen, F. Dehn, P. Moyo
Print ISBN: 978-0-415-89952-9
Publisher: Taylor & Francis Group
Pages: 375- 376
Total Pages: 2
Language: English

Good adhesion of a repair material to concrete is of vital importance in the application and performance of concrete repairs. This paper reviews and compares techniques and results of bond strength test methods that induce shear, including a tensile slant-shear test. The effect of surface preparation and modulus mismatch between repair and substrate are illustrated by experimental and theoretical data. While these tests can provide individually useful information on bond strength and a limited picture of bond characteristics, they can, taken in isolation, result in a misunderstanding of the behaviour of bonded cementitious materials. A more complete appreciation can be obtained by consideration of a bond failure envelope that encompasses all possible normal/shear stress states. An experimental study was performed to evaluate the slant shear between two concrete layers, for different techniques for increasing the roughness of the substrate surface. Slant shear tests were conducted to quantify the bond strength in shear.

Online publication: 2014
Publication Type: abstract_only
Public price (Euros): 0.00