Effect of Addition of Iron Lathe Waste as an Additive to Normal Concrete Compressive Strength and Tensile Strength of Concrete

Concrete is obtained from mixing fine and coarse aggregate materials, namely sand, crushed stone and other materials by adding sufficient cement adhesive and water. Concrete itself is a material that is often used because it is durable, inexpensive, and can be moulded into complex shapes. Concrete has a fairly large compressive strength but has a small tensile strength. To overcome these problems, concrete with special characteristics was found, namely steel fiber concrete (BSB). However, steel fiber is quite expensive if used for small scale construction. In this research, lathe iron waste was used as an added ingredient in the concrete mixture with varying levels of 0.75%, 1.5%, 2.25%, 3%, 3.75%. From this composition, concrete compressive strength and concrete split tensile strength tests were then carried out. The results showed that the addition of iron lathe in concrete to the compressive strength of concrete characteristics did not really show a significant difference in results, namely a decrease in compressive strength of 0.0496% in the 1.5% variation of 22.24 MPa when compared to the value in the 0% variation (normal) of 22.25 MPa. The addition of iron lathe in concrete to the tensile strength of concrete characteristics shows more results, namely an increase of 10.739% in the 2.25% variation of 10.04 MPa when compared to the value in the 0% (normal) variation of 9.07 MPa