Indonesia Conference Directory

This research study discusses the modulus of elasticity of concrete using abaca fibers. The addition of abaca fiber to concrete mix is ​​done with the composition of abaca fiber 0% (normal concrete), 0.15%, 0.20%, 0.25% with a fiber length of 50 mm. Concrete cylindrical specimens (100 mm x 200 mm) with each variation of 3 cylinders with a total of 12 specimens tested after the specimens reached 28 days in a Universal Testing Machine (UTM) and evaluated through the ASTM standard in testing concrete compressive strength. Concrete compressive strength test results with variations in length of 50 mm with a fiber volume of 0.15% produces an elastic modulus of 23057.14 MPa. For a volume of 0.20% the modulus of elasticity is 19575.44 MPa. Then for the fiber volume of 0.25% the modulus of elasticity is 17104.90. Normal concrete modulus value 20058 Mpa. From these results it can be concluded that the more fiber volume, the smaller the modulus of elasticity. The modulus of elasticity of abaca fiber concrete with a fiber length of 50 mm and a fiber volume of 0.15% is the best and gives an increase of 14.96% to normal concrete.