Characterisation of the Alkaline-Resistance of Fiber-Reinforcement Strands Produced in a Dynamic Fiber Winding Process for 3D Concrete Printing (2024-11)¶

It is imperative that the construction industry becomes more sustainable if global climate targets are to be achieved. There are various ways in which this can be achieved, one of which is the establishment of additive manufacturing concepts. Free-form design, efficient use of materials and digital processes can make buildings significantly more sustainable in the future. The research presented here focuses on the development of reinforcement strategies for large and thus load- bearing, additively manufactured concrete structures. The reinforcement of additively manufactured components is very challenging due to their layer-by-layer construction. One approach for this is the robotic integration of glass fibre reinforcement strands by winding. Previous works have already presented a Dynamic Winding Process that can be used to implement various reinforcement concepts for different additive manufacturing methods. It is important to know the exact mechanical properties of the reinforcement structures that can be produced with this process to use them as efficiently and purposively as possible. In this paper, the alkaline resistance according to ISO 10406-1 for reinforcement bars made of E-glass and ECR-glass as primary fibre material is presented. Detailed knowledge of load transfer and the long-term durability of the reinforcement strands that can be produced is important to increase the service life and thus the sustainability of the structures produced.