Recipe development of low-cost wollastonite-based phosphate cements

Compositions of low-cost wollastonite-based phosphate cements (Wo-PC) were developed as materials, which are suitable for a continuous manufacturing process of structural or functional elements. The composition influences the curing temperature and time, the porosity as well as the microstructure and the mechanical properties. The initial substances were adapted in order to minimize the material costs on the one hand and to maximise the cement's hardness within the test series on the other hand. Scanning electron microscopy (SEM) and energy disperse spectroscopy (EDX) showed the material's structure and distribution of additives depending on their concentration. Additionally, evidenced macroporosity, mesoporosity and microporosity reveal the potential of Wo-PC as functional and structural materials for loadbearing elements. Compositions with a suitability for various applications, such as foams or bulk materials for structural applications, were established and a base for a tailored processing of Wo-PC was built.