Özet:

In this study, the amount of polypropylene fiber was investigated that effect to physical (unit weight, air content) and mechanical (compressive strength and modulus of elasticity) properties of concrete. The different amounts of polypropylene fiber (0, 300, 600, 900, 1200 gr/m3) to prepared mixtures in three different cement dosage (350, 400 and 450 kg/m³) were added. According to experimental results, unit weight, compressive strength and modulus of elasticity decreases while the air content increases depend on the amount of fiber. Estimation model of the modulus of elasticity from the cement dosage, fiber content and air content is developed by using fuzzy logic. Also, It was investigated that relationships between experimental results with model results or analytical equations that proposed by the standards. As a result, proposed approaches by standards have been inadequate in determining modules of elasticity of the fiber containing concrete, the best results were obtained from fuzzy logic model (R2 = 0,988). It should be developed the new analytic equations for fiber containing concrete and fuzzy logic is used successfully to predict the properties of fiber concrete are usable.

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