In HERACLES two kinds of mortars have been developed:
1- a natural lime-based mortar for historical masonry walls: natural cement free lime-based mortar, for the restoration of historic buildings, with excellent mechanical and chemical compatibility with materials used in the past, with optimised porosity guaranteeing permeability to aqueous vapour, and low reaction to the disintegrating actions of the salts contained in the walls. Using natural binders, improved with nanometric particles, the pozzolanic activity has been improved.
2- a technical mortar expressly developed for the restoration/consolidation of old reinforced concrete structures, showing an advanced degradation state. It is reo-plastic, fiber-reinforced, and polymer-modified, formulated with high sulphate-resistant binders and selected sands, in a controlled granulometric curve. It presents high compressive strenght, adequate elastic modulus, very low presence of soluble chlorides, together with compensated hydraulic shrinkage. It has a reduced permeability to CO2, with resulting increased anti-carbonatation requisites.