ABSTRACT
During rehabilitation works of the Abbazia di San Paolo Fuori le Mura in Roma the solid brikcs of masonry panels of the "Corridoio del Silenzio" at second floor near the Biblioteca Monumentale required strengthening. The increase of the bending and shear bearing capacity of masonry walls was then achieved by using Fabric Reinforced Cementitious Matrix (FRCM) systems based on fibers of pbo arranged on both surfaces of the walls subjected to intervention according to a reticular scheme. In order to obtain the seismis retrofitting of Palazzo Arnone, located in an area of high seismicity, it was adopted the same methodology used for the Corridoio del Silenzio walls, and namely providing the resealing of existing mortar joints and the strengthening of the walls by FRCM. The penetration tests using the method Windsor Pin showed that the compressive strength of the new mortar is appreciably greater than that of the original mortars.
