Cementitious composites for structural applications based on metakaolinite phosphate cements

Metakaolinite/phosphate cement (MKPC) is studied as a new environmentally friendly alternative to Portland cement with remarkable properties. In this work, an experimental study on the chemistry, microstructure and mechanical properties of the matrix material is presented. In parallel, an investigation of composites produced with the developed cementitious inorganic matrix and different types of reinforcement is undertaken. Due to the acidic environment of the fresh paste and the fact that it becomes pH neutral after hardening, it provides a mild environment for the embedded fibers. Therefore, use of E-glass fibers is feasible. Two-dimensional sheets, randomly chopped, tri-axial as well
as 3D symmetric glass fiber fabrics are applied in order to check the impregnation, workability, mechanical strength and durability of the final
composite. The mechanical properties are evaluated on beams loaded in tension. The results reveal that MKPC binder is well suited for developing
textile reinforced cementitious composites, which can be promising candidates for a high-performant, fire-resistant, sustainable building system.