The impact of recycled plastic fibers on bending behavior of green RC beams in the sea conditions

Marine concrete structures, due to proper mechanical behavior and high durability for the world population, which are directly or indirectly related to marine infrastructure and various industries seem essential. On the other hand, concrete production and other related industries in marine environments are the main agents of production of pollution and waste and excessive consumption of the earth's natural resources and energy. Therefore, it seems that the simultaneous use of cement replacements to reduce the generation of greenhouse gases derived from cement production and plastic waste as fiber can decrease environmental pollution and improve concrete mechanical behavior. This study investigates the impact of incorporating ۰.۵ and ۱% strip disposable glass fibers (GF) and strip garbage bag fibers (BF) on the flexural and cracking characteristics of reinforced concrete (RC) beams containing ۱۰% metakaolin/zeolite. The investigation is conducted over ۲۸ and ۱۸۰ days in the tidal environment of the Oman Sea. Considering the results, by adding GF and BF to the green RC beams the flexural toughness (T) increased up to ۴۷ and ۲۷%, respectively. Furthermore, the cracking load (Pcr) of glass fibers RC (GC) and bags fibers RC (BC) beams was lower than RC up to ۳۲ and ۲۱%, respectively. Moreover, the incorporation of GF and BF resulted in an increase of up to ۲۸% and ۱۶% in the maximum load capacity (Pmax) of RC beams, respectively. In addition, the Pmax and T of GC beams were higher than BC. Besides, it was observed that metakaolin GC and BC beams exhibited a greater value of Pmax and T compared with zeolite beams.).

کلیدواژه ها:

Disposable Glasses Fiber ، Garbage Bag Fiber ، Green Reinforced Concrete ، Metakaolin and Zeolite ، Flexural and Cracking Behavior