Heiko Herrmann - Short Fibre Reinforced Cementitious Composites and Ceramics

Common engineering materials reach in many applications their limits and new developments are required to fulfil increasing demands on engineering materials. The performance of materials can be increased by combining different materials to achieve better properties than a single constituent or by shaping the material or constituents in a specific structure. The interaction between material and structure may arise on different length scales, such as micro-, meso- or macroscale, and offers possible applications in quite diverse fields.

This book series addresses the fundamental relationship between materials and their structure on the overall properties (e.g. mechanical, thermal, chemical or magnetic etc.) and applications.

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Composites containing short fibers are important in many technological fields, and the used composites range from fiber plastics to fiber concretes. Especially in the building industry, fiber composites are gaining importance, as they may increase the building speed and improve material properties. The used fibers include steel, basalt, carbon, and polymer fibers, of many different shapes and aspect ratios. The target of including fibers also differs, including improving tensile strength, post-cracking behavior (ductility), and temperature resistance. In all cases, the microstructure and spatial and orientational distribution of the fibers are important. At this colloquium, different methods and results for the analysis of microstructure and fiber orientation analysis in cementitious building materials containing fibers, among them concretes and refractory composites, have been presented. The goal of the colloquium was to present a platform for the exchange of ideas between different fields with similar problems. While having different chemical compositions and length scales, cementitious composited and ceramics reinforced with short fibers share similar mechanical properties and theoretical problems. Especially, the addition of the short fibers makes the composite stochastically anisotropic and inhomogeneous, since several macro- and mesoscale properties depend on the spatial and orientational distribution of fibers. An important aspect is the microstructure around the fibers and the adhesion of the matrix to the fibers, which has large influence on mechanical properties. There were altogether 19 participants and 14 presentations, among these three keynote talks, given by Daniele Casucci (Kaiserslautern), Johan L. Silfwerbrand (Stockholm), and Akke Suiker (Eindhoven). This volume contains selected papers from participants and members of the scientific committee.

We thank Euromech for accepting the proposal of this colloquium and for supporting it, both financially and by hosting the website. Support by the Estonian Research Councils exploratory research grant PUT1146 is gratefully acknowledged. Furthermore, we thank Holm Altenbach (as series editor) and Christoph Baumann (Springer) for supporting this book proposal. For their help with organizational matters, we thank Kristi Juske, Mare Saago, Oksana Goidyk, and Andres Braunbrck. Finally, we thank TUT Mektory for providing the rooms for the colloquium.