To the Problems of Anchoring Adhesives in High Performance Concrete

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

“…Due to the fact that in many cases it is necessary to verify the mechanical properties of the developed contact material with the lowest possible costs and time requirements, it is not entirely effective to use established testing methodologies that depend on the preparation of the concrete testing specimens. An example of the suitability of the described methodology can be researched in the field of using concrete with a compressive strength greater than 60 MPa together with a steel anchor bolt stronger than 800 MPa while maintaining the minimum possible anchorage lengths [9]. In such a configuration, the weakest element of the system is usually the contact material, and the resulting loadbearing capacity of the system is no longer significantly affected by the characteristics of the concrete.…”

“…However, there are also configurations in which the quality of the bond between the steel and the concrete that is mediated by the adhesive may be limiting. These situations in particular include, unfavourable conditions during the installation of the anchor, especially low temperature [8], or a specific geometric configuration, such as a small anchor length combined with high concrete strength [9]. The mechanical properties of the adhesive itself play a major role in both of the cases above.…”

“…Derakane 411 vinyl ester resin[9]. The basic recipe of CHS Epoxy 531[9]. The basic recipe of Derakane 411[9].…”

“…The basic recipe of Derakane 411[9]. Grounded limestone filler in CHS Epoxy 531[9]. Grounded limestone filler in Derakane 411[9].…”

“…Grounded limestone filler in CHS Epoxy 531[9]. Grounded limestone filler in Derakane 411[9]. Carbon fibres in CHS Epoxy 531, 10 phr[9].…”