The topic of structural consolidation of masonry buildings is very wide and complex and can be faced with many different techniques. Fornaci Calce Grigolin has developed several solutions for the improvement of the characteristics of masonry panels and their consolidation:
- FRCM fiber-reinforced composites with inorganic matrix
- CRM interventions through reinforced plaster
The term FRCM stands for Fiber Reinforced Cementitious Matrix and indicates the reinforcement systems of low thickness to be applied on the masonry surface in order to provide it with a resource against shear-tract stresses. They are the result of the coupling of: an inorganic matrix made with lime-based mortar (or cement), suitable for structural use and therefore with guaranteed performance in accordance with UNI EN 998-2 or UNI EN 1504-3; nets (or unidirectional fabrics) made with long fibers of tensile-resistant materials (glass) pre-applied with polymer coatings; mechanical connections with the aim of promoting collaboration with the masonry and especially to solidarize between them parments possibly not well amortized and therefore more susceptible to overturning phenomena.
The term CRM is an acronym for Composite Reinforced Mortar and indicates a technique that combines preformed fibrous reinforcements and inorganic mortars. They typically consist of: alkali-resistant preformed reinforcement meshes made by impregnating long glass fibers with thermosetting polymeric resins; preformed mesh angles to ensure continuity of reinforcement in changes of direction, made with the same materials and production process as the meshes; alkali-resistant connection elements, with the function of guaranteeing the connection of the reinforced plaster with the support and, if necessary, with the reinforcement applied on the opposite face; cement-based or lime mortars with guaranteed performance for structural use and therefore conforming to the appropriate sections of UNI EN 998-2 or UNI EN 1504-3; chemical anchors for anchoring the connectors to the support, CE marked on the basis of a harmonized standard or ETA.
The thickness of the reinforcement package is normally between 30 and 50 mm, net of the leveling of the support.