Specimen reinforced with glass and basalt fibres were prepared using Standard Portland cement (CEM I, 52.5 R as prescribed by EN 197-1) and standard sand, in accordance with EN 196-1.
From this cementitious mixture, a reference cement mortar without fibers was first prepared. Compressive strength, modulus of elasticity, and mod of fracture were determined for all specimens. Static and dynamic properties were investigated using Instron testing machine and split Hopkinson pressure bar, respectively.
Content of the glass fibers in the mortar does not influence the fracture stress at static loading conditions in a clearly observed way. Moreover at dynamic range 5% content of the fiber results in a significant drop of fracture stress.
Analysis of the basalt fibers influence on the fracture stress shows that optimal content of this reinforcement is equal to 3% for both static and dynamic loading conditions. Further increase of the fiber share gives the opposite effect, i.e. drop of the fracture stress.
Leopold Kruszka¹, Wojciech Moćko², Luigi Fenu³ and Ezio Cadoni⁴
1 Gen. Jaroslaw Dabrowski Military University of Technology, 2 Gen. Sylwester Kaliski St., 00-908 Warsaw, Poland
2 Motor Transport Institute, 80, Jagiellonska St., 03-301 Warsaw, Poland
3 University of Cagliari, 09123 Cagliari, Italy
4 University of Applied Sciences of Southern Switzerland, DynaMat Laboratory, 6952 Canobbio, Switzerland