Pengaruh Penambahan Serat Kawat Bendrat Pada Campuran Beton K175 Terhadap Kuat Tekan Beton

Abstract

Penelitian ini dilakukan untuk mengetahui pengaruh penambahan serat kawat bendrat pada campuran beton K-175 terhadap kuat tekan beton. Dengan perbandingan campuran beton 1:1,624:4,621 dan FAS 0,52. Benda uji yang digunakan adalah kubus 15×15×15cm, sebanyak 10 benda uji untuk masing-masing persentase penambahan serat kawat bendrat. Hasil penelitian menunjukkan nilai kuat tekan beton pada 0% penambahan serat kawat ialah 223,45 kg/cm2, nilai kuat tekan beton pada 2% penambahan serat kawat ialah 254,23 kg/cm2, nilai kuat tekan beton pada 5% penambahan serat kawat ialah 257,29 kg/cm2, dan nilai kuat tekan beton pada 7,5% penambahan serat kawat ialah 248,19 kg/cm2. Hasil ini memperlihatkan bahwa dengan menambahkan serat kawat bendrat pada beton, nilai kuat tekan beton lebih tinggi dibandingkan nilai kuat tekan beton yang tidak diberi penambahan serat kawat bendrat. Persentase optimum penambahan serat kawat bendrat ialah 5%. Namun berdasarkan pengolahan dari data regresi dengan metode crammer, persentase optimum penambahan serat kawat bendrat ialah 4% dengan nilai kuat tekan beton 257,96 kg/cm2. Penambahan serat kawat bendrat yang melebihi persentase optimum akan menurunkan nilai kuat tekan beton. This research was conducted to determine the effect of adding bendrat wire fibers to the K-175 concrete mixture on the compressive strength of the concrete. With a concrete mixture ratio of 1: 1,624: 4,621 and FAS 0,52. The test object used was a 15 × 15 × 15cm cube, as many as 10 specimens for each percentage addition of bendrat wire fiber. The results showed the value of the compressive strength of concrete at 0%, the addition of wire fibers was 223.45 kg / cm2, the value of the compressive strength of concrete at 2%, the addition of wire fibers was 254.23 kg / cm2, the value of the compressive strength of concrete at 5%, the addition of wire fibers was 257.29 kg / cm2, and the value of the compressive strength of concrete at 7.5% of the addition of wire fibers was 248.19 kg / cm2. These results show that by adding bendrat wire fibers to the concrete, the compressive strength value of the concrete is higher than the compressive strength value of concrete which is not given the addition of bendrat wire fibers. The optimum percentage of addition of bendrat wire fibers is 5%. However, based on the processing of the regression data using the crammer method, the optimum percentage of addition of bendrat wire fiber is 4% with a concrete compressive strength value of 257.96 kg / cm2. The addition of bendrat wire fibers that exceed the optimum percentage will reduce the value of the compressive strength of the concrete.