ABSTRACT
The present paper presents the results of an experimental campaign aimed at investigating the mechanical performances of different FRC shotcrete mixes by means of tests on square (EN 14488-5) and circular panels (ASTM C1550-12). In particular, two different concrete mixes were tested, they featured the same aggregates, but one of the two mixes contained silica fumes a replacement of a fraction of cement. Different dosages of macro synthetic fibres (3 to 8.5 kg/m3) were used in each of the two mixes as well as a single dosage of steel fibres (30 kg/m3). Both sprayed and cast panels were considered. In addition to these panels cast notched prisms were tested in three-point bending. The paper discusses the mechanical behaviour of the various specimens, analysing the influence of concrete mix and fibre dosage, and presents correlations among different tests.
