This project deals with the analysis of the performance of concrete with internal curing aggregates (IC), low clinker cementitious materials and steel fibres, to be used in real applications in the field of precast industry. The low clinker cementitious material will be composed of clinker (C), metakaolin (MK) and limestone filler (LF) as powder material. In order to promote the sustainability of these products, a sustainable powder (SP) obtained from wood ash will be included. In addition, aggregates from coal bottom ash (CBA) will be used as internal curing water reservoirs. This section includes the characterization of these materials providing their main properties as particle size distribution, density or absorption, among others