On the methods of bond strength measurements in concrete repair systems

Bogumila Chmielewska 

Warsaw University of Technology, Faculty of Civil Engineering, Building Materials Eng.Division (BME WUT), Armii Ludowej 16, Warszawa 00-637, Poland

Abstract

Adhesion is a complex phenomenon which play significant role in modern building composite structures as well as in the case of repair of existing structures. In the paper adhesion joints created as a result of concrete repair or concrete protection are characterized. Methods used to measure a bond strength, which differ in the way of loading are shortly presented. The experiences with wedge splitting test applied for such measurements are especially described. The work presents comparative analysis of the bond strength measurements carried out using the following methods: wedge splitting test, tensile splitting test, direct tension and bending tests, pull-off test, slant test. The investigation was done for model repair systems consist of ordinary cement concrete substrate and mineral repair materials;two commercial repair materials were used. Additionally, the effect of concrete substrate quality and influence of primer was tested. Effect of various measurement methods on the obtained results of bond strength is discussed.

 

Presentation: oral at E-MRS Fall Meeting 2005, Symposium G, by Bogumila Chmielewska
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-05-19 10:19
Revised:   2009-06-07 00:44