This paper summarises a long-term study organized in two consecutive steps. The first, which involved exploring a number of laboratory-synthesised belite clinkers with slightly different mineral compositions in depth, culminated in the industrial-scale manufacture of one of those materials. In the second a hybrid alkaline belite cement was prepared containing 48 % of the industrial belite clinker, 48 % fly ash and 4 % chemicals. The hybrid binder was subsequently analysed to determine its mechanical strength and hydration products. The findings showed that the hybrid alkaline belite cement designed met the compositional, mechanical and setting time requirements laid down in European standard EN 197-1 and that its hydration favoured the simultaneous precipitation of a mix of cementitious gels: C-(A)-S-H and N-(C)-A-S-H.

Trabajo presentado al 15th International Congress on the Chemistry of Cement (ICCC), celebrado en Praga (República Checa) del 16 al 20 de septiembre de 2019.

This research was funded by the Spanish Ministry of the Economy and Competitiveness and FEDER under research projects BIA2016‐76466‐R and RTC2016‐4872‐S.