The article carries the first results of a research project finalized to the creation of a Non Destructive method of investigation to control the correct execution and about the preservation state of the plates in FRP, utilized in the static consolidation of buildings. The methodology provides for the utilization of two technics: Infrared Video Thermography and the micro-seismic low-frequency ultrasound. Born for other fields, the composite materials with polymeric matrix, world-wide known by the acronym FRP (Fiber Reinforced Polymers), are finding more and more application in civil engineering fileld. Their performance features, shortly recalled in the article introduction, make them particularly suitable for static consolidation of buildings, both those in walling and those in reinforced concrete. At present one of the intervention technic more widespread in this field is the plating one, consisting in sticking a laminate in FRP on the surface of the structural element to make stronger after a previous suitable preparation of the support. To have an efficacious intervention it is necessary that the laying is done in a correct way, that the rectilinearly of the fibres and, mostly, sticking to the support is guaranteed. Then, so far, one of the biggest interrogative about the use of these materials is their duration in service conditions, if it is true that actually the high electrochemistry resistance and the mechanical property theoretically make them more durable than traditional materials as steel and concrete, but there is not an experimentation in this field averting the arising of new problems. On the grounds of these observations it is comprehensible how important is an investigation to make both on the stocks, during the process of manufacture to value the correct execution and on already - achieved intervention to estimate the preservation state. Subsequently we describe the first results of these investigation.
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