عنوان مقاله [English]
نویسندگان [English]چکیده [English]
Concrete as the most commonly used materials in the construction is of particular importance and according to structures retrofitting in various lateral forces to reduce human and economic damage, light and its impact are considered on a variety of structures. Concrete with lower density can lead to lighter structures in a way that using concrete with specific gravity of less than 1900 Kg/m3 and compressive strength more than 17 MPa in reinforced concrete structures is considered by many design engineers. Using of Sawdust in mix design of concrete is one way to reduce the density of concrete. In this research the percentage replacements of sand by sawdust were (0%, 15%, 25% and 35%). The size of test sample concrete adopted was 100x100x100 for compressive strength and 200x100 for tensile strength. The samples were removed from their moulds after 24 hours and allowed to cure 7,14 and 28 days. The results show that 25% Sawdust replacement of Sand with the compressive strength of 19MPa and density of 1904 is the optimal choice.