Pengaruh Penambahan Serat Ampas Tebu terhadap Kuat Lentur dan Kuat Tarik Belah Beton Normal

Abstract

Concrete is the most widely used construction material today due to its chemical and mechanical properties, which make it more resistant to the environment and provide great durability. Fiber concrete is concrete in which natural or artificial fibers are added. Adding fiber to the concrete mix is expected to improve the properties and characteristics of concrete. Bagasse fiber was obtained from the Kwala Madu Sugar Factory (PGKM) PT. Nusantara Plantation II. In this experiment, the test specimens were made with variations of bagasse fiber 0%, 0.25%, 0.5%, 0.75%, 1%, 1.25% and 1.5% by weight of cement. The tests carried out were flexural strength and split tensile strength tests with beam specimens with p=53cm, b=15cm, l=15cm and cylinders with a diameter of 150 mm and a height of 300 mm. From the results of this study, the slump value for concrete with variations in the addition of bagasse fiber was lower than concrete with 0% fiber variations. Then the flexural strength test was carried out at the age of 28 days of concrete, the flexural strength value of the addition of bagasse fiber to the concrete with variations of 0%, 0.25%, 0.5%, 0.75%, 1%, 1.25% and 1 .5% respectively, namely 3.62 MPa, 3.83 MPa, 4.13 MPa, 4.30 MPa, 3.57 MPa, 3.14 MPa and 2.71 MPa. The split tensile strength values from adding bagasse fiber to concrete were 2.01 MPa, 2.08 MPa, 2.23 MPa, 2.34 MPa, 1.95 MPa, 1.70 MPa and 1.50 MPa, respectively. The highest flexural strength value was in adding 0.75% bagasse fiber by 4.30 MPa, which increased 19%, and the lowest flexural strength value was obtained in concrete with a variation of 1.5%, which was 2.71 MPa. The highest split tensile strength value was in the variation of adding 0.75% bagasse fiber of 2.34 MPa, which means there was an increase of 16%, and the lowest split tensile strength value was obtained in concrete with a variation of 1.5%, which is equal to 1.50 MPa.