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NEWS26 CPI %u2013 Concrete Plant International %u2013 3 | 2025 www.cpi-worldwide.comOptimization of fresh concrete properties and concrete production technology continue to attract attention in the concrete research community. Performance requirements and testingof fresh printable cement-based materials3D concrete printing is an additive manufacturing technique that uses digital models to guide the creation of structures. The behavior of the fresh material during pumping and deposition, as well as how it hardens, is influenced by factors such as material composition, environmental conditions, and the timing of layer deposition. The specific conditions under which a new layer is placed on top of an older one can significantly impact the strength of the joint between them. Recent research has focused on understanding the rheological requirements of the material, quantifying buildability, and predicting structural failure to control deformation. Standardized, internationally accepted methods to measure and assess material and process performance are essential for the technology's industrial future.RILEM TC 303-PFC deals with the performance of the printable material in its fresh state and the performance of the delivery system. The expected outcomes are methods of performance assessment, measurement and specification that can be used to establish quality control for printing systems and materials for industrial application. The targeted users are researchers, practitioners and standardization bodies in the field of concrete technology. In particular, the recommendations to be developed by the TC should facilitate the introduction of this new technology into the practice of construction, including precast manufacture. Assessment of additively manufactured concrete materials and structuresMost research on 3D concrete printing has focused on the properties of concrete in its fresh and transition states, which are crucial for understanding the manufacturing process and the stability of freshly printed elements. However, less attention has been given to the prediction and characterization Research setup for magnetorheological control in case of pumping of cementitious materials (setup at Ghent University, Belgium, image courtesy of G. De Schutter).RILEM Publications include State-of-the-Art Reports, conference proceedings, technical papers, and more. Here: publications showcased at a technical conference (Image courtesy of D. Ciancio).