out on different series of specimens. Five types of FRCM materials
were studied, composed by different types of PBO, carbon and glass
fibers and three types of mortars.
Most of the experiments confirmed that the behavior of FRCM
materials in tension can be characterized by trilinear curves. The
first part corresponds to the un-cracked phase of the mortar while
in the second phase the cracks develop and in the third phase only
the fiber reinforcement can carry the applied load. In this phase the
measured stiffness and the ultimate strength of the specimens correspond
to the relevant values of the dry fabrics.
From the tensile test results on PBO-FRCM, G-FRCM and
C-FRCM materials it is possible to conclude that the slopes of the
first and second phases are comparable. Instead there are many
differences in the third phase, due to the different modulus and