ABSTRACT
This chapter presents some relevant applications of mortar- based composites for strengthening historic masonry structures. Innovative strengthening systems made of composites externally bonded with inorganic matrix are currently used in the rehabilitation of masonry structures. The need for strengthening masonry walls is mainly related to their weakness under earthquake action, as dramatically revealed by the damage suffered by historic masonry buildings during seismic events. The transversal connectors could be made of steel pins, natural or artificial transverse units, or composite material. The composite, being able to carry the tensile load, avoids the opening of the cracks, thus preventing the activation of the four hinges failure mechanism. Grain size range, porosity and composition of the mortar matrix have to be designed accordingly, to provide adequate strength and comply with conservation principles, such as vapor permeability, removability and compatibility with original substrates and decorative settings.
