Özet:

The most important issue encountered in reinforced concrete structures is the brittle of rebar. Structural elements with brittle behavior undergo rapid plastic deformation under loads. Since the energy absorbed by the brittle element is low, collapse occurs as soon as the structural element reaches its carrying capacity. It is therefore desirable that the structural elements have a certain ductile behavior. The various fibers added to the concrete can absorb more energy than the energy absorbed by this brittle behavior of concrete by providing some ductility to the concrete. The various fibers added to the concrete prevent the brittle fracture of the concrete by increasing ductility to the concrete. In this study, the effects of polyvinyl alcohol (PVA) on hardened mortar properties of different volume fractions were investigated. The fibers were added to the mortar in a ratio of 2%, 4%, 6% by volume, and fiber-free control sample was produced. Compressive and flexural strength, ultrasound velocity, water absorption, dynamic elasticity modulus and microstructure analysis were performed and compared. According to the results, with the increase of PVA fiber utilization rate in mortars, multiple cracking behavior was observed in the produced samples and the mortars exhibited a ductile behavior and the crack widths decreased.

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