The use of GFRP grids for structural rehabilitation of masonry elements

This paper illustrates the use of FRP materials to reinforce existing masonry buildings, including buildings of historical and architectural value. In this work an innovative technique (glass fibres reinforced plastic grid applied by cement or lime based mortars) to improve the structural behaviour of masonry elements is analyzed. This paper illustrates the preliminary results of an ongoing experimental research project at the LPM of the Politecnico di Milano. The work is divided in 3 parts. In the first one the reinforcing technique is illustrated and the mechanical properties of the GFRP grid and cement or lime based mortars are evaluated. In the second one the debonding strength of the reinforcing system is investigated. Finally, in the third one, the proposed reinforcing technique is compared to a standard system which makes use of CFRP wraps and epoxy resin. In the conclusions the advantages and disadvantages of the reinforcing system are discussed