Abstract
It is known that slurry infiltrated fibers concrete (SIFCON) is a type of concrete that possesses superior properties. To reduce the initial cost of fibers and to overcome the detrimental effect of waste plastic this study has been attempted to use polyethylene terephthalate (PET) waste fibers to produce SIFCON mixtures and investigate their properties. Six SIFCON mixtures were produced in which three volumetric proportions of fibers (3 %, 5 %, and 7 %) and two aspect ratios (36.8 and 24.57) were used. Behavior of these mixtures was compared with a normal concrete mixture containing no fibers and having approximately the same compressive strength. Flexural testing was conducted for small prismatic specimens and also on large reinforced concrete beams. The behavior was evaluated in terms of flexural strength, toughness and ductility. The results showed better flexural strength in case of SIFCON mixtures compared to normal concrete mixtures for both investigated aspect ratios. In addition, toughness and ductility were significantly improved as PET fiber content increase. Moreover, enhancement in toughness and ductility is more obvious in case of first aspect ratio. SIFCON reinforced beams showed a ductile behavior and sustained more damage. The use of PET fibers can be considered a promising option to produce sustainable SIFCON mixtures with improved properties.
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