Research on Pure Modes I and II and Mixed-Mode (I/II) Fracture Toughness of Geopolymer Fiber-Reinforced Concrete

The unsustainable use of resources and the rising demand for traditional concrete have disrupted ecological equilibrium, necessitating adoption a more appropriate long-lasting alternative. One such substitute cement in production is geopolymer concrete, although this material prone to cracking fracturing due its low tensile strength, leading costly repairs or even structural collapse. Fiber-reinforced has recently been widely adopted as construction counteract these issues. This research examined crack proliferation fracture toughness comprising different fibers using cracked Brazilian disc. Four were used, polypropylene steel fiber (short long), at dosage 1.5% by volume. Fracture was computed various modes (I, II, I/II) fractures, propagation from specimens studied. A angle inclination (0, 15, 28, 83, 60, 75, 90 degrees) used conduct disc test on with respect preexisting direction. findings indicate that increasing loading increased load-carrying capacity. values under all three ranged 0.26 1.75 MPa.m1/2. Additionally, long exhibit higher than short fibers.