As part of my PhD, I investigate the rheological and mechanical parameters for the development of various types of lightweight concrete. In recent years, there has been a growing interest in reducing concrete density while maintaining adequate strength. Infra-lightweight concrete (ILC) represents the latest development for monolithic exterior walls in lower strength and density categories. Our institute conducted a large-scale pumping experiment on ILC, addressing the rationalizing of the construction process and optimizing concrete handling. Our university’s media team documented parts of the investigation in a captivating video. My presentation on our experiments marks the first-ever study on ILC’s pumpability, using some of the most common concrete pumps to determine the influence of pressurizing ILC made with highly porous aggregates. Apart from my presentation I attended numerous presentations on intriguing topics. This conference has a long tradition of uniting science and building practice in Europe. Lectures primarily focused on the challenges of developing and applying building materials, accompanied by a product and technology exhibition. This year, the emphasis shifted towards resource-conserving, sustainable construction and renovation, promoting low-CO₂, carbon-neutral, or even carbon-negative building materials.

Timo Haller is Research Associate at the Institute for Construction Materials, Faculty of Civil Engineering and Environmental Sciences at the University of the Bundeswehr Munich.