Assessments on the material properties of the Pietraforte stone of Florence (Italy) in conservation, restoration and construction

“Pietraforte” is the historic name of a turbiditic sandstone extensively used in monumental buildings Florence from Roman period to early XX century. Today all historical quarries are disused, and they have been reclaimed as urban areas or parks (e.g., Boboli Garden). No technical data on Pietraforte available, although would be valuable drive conservation these exceptional buildings. In this work results an experimental research shown; campaign was aimed at investigating mechanical properties through both destructive non-destructive tests. The analysed samples were extracted some ancient for Florentine area. All tested according international standards, order collect statistically consistent terms ultrasonic velocity P-waves uniaxial compressive strength. A predictive model relate strength proposed basis obtained results. collected refer “fresh” intact rock provide useful knowledge that can design calibrate interventions made Pietraforte.