Cigarette butts discarded in nature have become one of the biggest environmental challenges. Providing solutions to recycle cigarette butts and incorporate them into practical uses can be highly beneficial. This study aims to reduce environmental pollution by investigating the impact of adding fibers from discarded cigarette butts on the performance and mechanical properties of sand-cement mortars to achieve green mortars with suitable compressive and tensile characteristics. Sand-cement mortar is one of the most widely used construction materials in the construction industry, and utilizing cigarette butts in mortar could offer a significant solution for their recycling. For this purpose, 10 different mixing designs with 0, 0.1, 0.2, 0.4, 0.5, 0.6, 0.8, 1, 3 and 5% of recycled cigarette butts’ fiber were developed, and based on them, samples were made with sand-cement mortar in the presence of silica fume and superplasticizer. Specific weight, compressive strength, tensile strength, flexural tensile strength, and force-displacement diagrams were calculated and examined for the mortar samples. Analyzing the results obtained in the laboratory, adding 0.2% by volume of cigarette filter fibers to mortar results in the maximum compressive strength. Meanwhile, the optimum percentage for increasing tensile strength is adding 0.5% by volume of cigarette filter fibers to sand-cement mortar. Furthermore, adding 0.5% recycled cellulose acetate fibers to a beam increases the strain capacity by twice and increases the energy consumption capacity by 4.5 times in the elastic state. Considering the results obtained in this research, a highly suitable solution for recycling cigarette butts has been provided.
