ABSTRACT
This chapter explores specimens with different bond lengths of Textile Reinforced Mortar (TRM) overlays are presented, as part of a larger experimental program that also includes specimens with different bond widths and different numbers of TRM layers. It presents an experimental program of double-lap shear tests aiming to assess the bond characteristics of interfaces comprising glass fiber textile reinforced cementitious mortars applied as overlays on unreinforced masonry wall prisms. TRM qualifies for use in this field since it can fulfill requirements of particular relevance such as compatibility with various masonry substrates and reversibility of the strengthening scheme. TRM is a composite material consisting of structural fiber grids as tensile reinforcement and cement- or lime-based mortar as matrix. The total length of the TRM strip was equal to two times the bonded length plus the unbonded length which included the space between the wall prisms and the starter lengths; the latter were introduced so that stress concentration phenomena could be avoided.
