As part of a short-term scientific mission, Katarina visited the Concrete and Earthquake Engineering Research Group led by Professor Maurizio Guadagnini and Kypros Pilakoutas at the University of Sheffield from July 10-22, 2022. During her stay, Katarina had the opportunity to exchange theoretical and experimental knowledge in the field of high performance fibre reinforced concrete design with the Sheffield team and was introduced to their current research activities. As a result of this STMS, two publications are planned.