Promotion Karoline Holz

On 13.12.2021, Karoline Holz successfully defended her scientific thesis within the framework of the doctoral procedure with the topic "Carbon Reinforced Concrete exposed to high temperature".

The subject of her dissertation is the experimental investigation of carbon reinforced concrete exposed to high temperature. In order to work up the subject fundamentally, the testing possibilities for determining the tensile and bond load‐bearing capacity of carbon reinforced concrete at room temperature were compiled. Based on this, the findings to date on high‐temperature tests on carbon fibre‐reinforced plastics were summarised and processed. The own experimental tests build on the preliminary considerations. The main focus was on investigating the tensile load‐bearing behaviour of the two selected carbon reinforced concrete material combinations. To determine the tensile strength, stationary and transient tensile tests were carried out in a temperature range between 100 °C and 600 °C. In the transient tensile tests, the load levels was between 50 % and 80 % of the tensile strength at room temperature. Tensile design values for the dimensioning of carbon reinforced concrete components in case of fire were then derived from
this.

In addition to the tensile tests, stationary bond tests were also carried out on the two material combinations in a temperature range between 100 °C and 400 °C. Here, the focus was primarily on predicting the bond test results on the basis of chemical considerations of the reinforcement material.

In addition to the chairman of the doctoral committee, Prof. Dr.-Ing. habil. Ivo Herle (TU Dresden), Prof. Dr.-Ing. Dr.-Ing. E.h. Manfred Curbach (TU Dresden) and Dr. Jörg Schmidt (Gesellschaft für Materialforschung und Prüfungsanstalt für das Bauwesen Leipzig mbH) were present as reviewers.

Prof. Dr. Benjamin Kromoser (University of Natural Resources and Applied Life Sciences, Vienna) was also present via video conference.

We warmly congratulate Karoline Holz on completing her doctorate and wish her all the best and every success for the future.