A testing program was initiated to determine the fracture behavior of concrete slabs reinforced with steel and synthetic, discrete fibers, wire mesh, and plain concrete under monotonic loading. Full-scale slabs were cast and tested at the University of Illinois Advanced Transportation Research and Engineering Laboratory (ATREL). The research is exploring the effects of various fiber types and volume fractions on the full-scale monotonic behavior of concrete slabs-on-grade. Furthermore, the testing of slabs includes comparison of the full-scale test results with comparative test results of simply-supported beams in terms of tensile strength, flexural strength, ultimate strength, and fracture toughness.