As one of the world's premier scientific events in computational mechanics and computational engineering, the congress brought together researchers and practitioners from across the globe to exchange the latest advances in computational science and engineering.

Jun.-Prof. Dr.-Ing. Luise Göbel presented the research titled:

"Micromechanical Experimental and Analytical Investigation of the Spatially Varying Interfacial Transition Zone in Concrete with Different Recycled Aggregate Types."

Her presentation showcased recent experimental and analytical investigations into the micromechanical characteristics of the Interfacial Transition Zone (ITZ) in concrete containing different types of recycled aggregates. The work provided new insights into the spatial variability of the ITZ and its influence on the mechanical behavior of recycled aggregate concrete, establishing an important experimental and analytical foundation for advanced multiscale material modeling.

Complementing this work, Ahmed Shittu presented:

"Spatially Heterogeneous ITZ Modeling in Recycled Aggregate Concrete: Multiscale Upscaling with Uncertainty Propagation."

Building upon the understanding of the spatially varying ITZ, this presentation introduced a multiscale computational framework that incorporates spatial heterogeneity and uncertainty propagation into the modeling of recycled aggregate concrete. The proposed approach enables a more realistic representation of material variability and strengthens the predictive capability of multiscale simulations, contributing to the development of more reliable and sustainable concrete materials.

Together, these presentations demonstrate the strong synergy between experimental characterization and computational modeling. By connecting detailed micromechanical observations with advanced multiscale numerical modeling, the research provides a comprehensive framework for understanding and predicting the behavior of recycled aggregate concrete, supporting the design of more sustainable and resilient construction materials.

We are grateful to the organizers of the 17th World Congress on Computational Mechanics (WCCM) and the 10th European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS) for providing an outstanding platform for scientific exchange and collaboration. We also appreciate the engaging discussions with researchers from around the world and look forward to building on the ideas and collaborations initiated during the conference.