Simplified Testing of the Bond Strength of Adhesives Used for Bonded Anchors.

Jan Barnat,Miroslav Bajer,Martin Vild,Jan Prokeš,Ondřej Bezděk

doi:10.3390/ma14123298

Abstract

The analysis presented in this paper is focused on problems of bond strength as an overall bond quality parameter of industrial adhesives for structural anchoring. In the first part, the problem of bond strength as the most important parameter influencing the final anchor resistance to tension load is described. Further in the text, a new methodology of simplified testing of the strength parameters of adhesives is described. Special test specimens made from steel are repeatedly used in this methodology. Additionally, results of these tests on some new recipes for adhesive are presented. Especially, epoxy resins with special fillers, such as carbon fibres, carbon nanotubes or graphene, were tested. The use of these adhesives in temperatures close to zero degrees Celsius was also tested.

Highlights

The anchoring of building structures by the use of post-installed chemical anchors remains one of the most interesting topics for many researchers in the world for the last several decades
The effect of the filler in the form of carbon fibres, nanotubes or graphene oxides is limited in combination with the used epoxy resin
One of the main parts of the presented analysis is the development of the simplified method for verifying the shear strength characteristics of the adhesive

Summary

Introduction

The anchoring of building structures by the use of post-installed chemical anchors remains one of the most interesting topics for many researchers in the world for the last several decades. There are many research studies dealing with the problem of the determination and description of the bonded anchor load-bearing capacity using experimental methods [1,2] or numerical simulations [3,4,5]. This problem is quite complex because this anchoring system usually consists of several materials (anchor bolt material, structure material in which the anchor bolt is installed and the contact material providing the connection). Many authors have suggested relationships derived from the results of experiments and numerical studies, and there are relationships based purely on the mathematical regressions of the results, without a direct link to specific material characteristics [6]

Methods

Results

Conclusion