Oral Presentation , Page 423-429 (7) Full Text (576.42 K)

Volume Title: 3rd International Conference on Civil Engineering: Development & Sustainability

¹Abdelnaser Omran ; ²Salahaldein Alsadey; ²Issa Amaish

¹Bright Star University Faculty of Engineering Sciences

²Department of Civil Engineering, Faculty of Engineering, Bani Waleed University, Libya

The objective of this study is to reduce the environmental issues caused by the disposal of construction and demolition wastes. To determine the suitability of sisal fiber (SF) reinforced recycled concrete for use in construction works, this paper compares the results of experiments done on the properties of fresh and hardened concrete materials with various replacement ratios of normal and recycled coarse aggregate reinforced by natural SF. It also examines the impacts of the various replacement ratios on the compressive and flexural strengths of the resulting mixes. For this study, waste concrete from construction projects was crushed to create recycled aggregate. Two different types of concrete combinations, one composed entirely of normal aggregate as a control concrete, and the other containing different percentages of recycled coarse aggregate (25%, 50%, 75% and 1.5% SF. To assess the compressive strength of the main characteristics of the hardened concrete, 24 specimens were prepared and used. The flexural strength of concrete beams manufactured from various types of concrete was also examined. In this study, recycled aggregate (RA) concrete performed satisfactorily and did not significantly differ from the performance of the control concrete regardless of the replacement ratio utilized, while the workability of SF-containing concrete was severely impacted. However, it is crucial to use high-quality recycled concrete coarse aggregate and to follow the precise guidelines for creating this kind of new concrete. The test findings demonstrated that the sisal-fiber-containing concrete sample provided excellent compressive strength as well as high flexural strength.

Recycled Aggregate; Sisal fibers; Recycled aggregate concrete; mechanical properties; Flexural test; Comprehensive strength

Structural and Construction Engineering