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Abstrak :
Badan Pengkajian dan Penerapan Teknologi (BPPT) Indonesia mengembangkan teknologi komposit untuk struktur Pesawat Udara Nir Awak (PUNA). Sebagai basis data material komposit, telah dilakukan pengujian terhadap material S-glass/epoxy dengan variasi orientasi serat S-glass. Pembuatan komposit dilakukan dengan metode hand lay-up dan diikuti vacuum bagging, kemudian dilakukan perhitungan densitas dan fraksi volume serat, serta uji geser dan uji lentur. Kerusakan permukaan komposit setelah uji mekanik diamati menggunakan Scanning Electron Microscope. Hasil pengujian ini menunjukkan komposit dengan orientasi serat 0°/90° memiliki sifat mekanik yang lebih baik daripada komposit dengan orientasi serat +/-45°, yaitu memiliki kekuatan geser, kekuatan lentur, dan modulus lentur secara berurutan sebesar 25,38 MPa, 273,21 MPa, dan 18,41 GPa.

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Badan Pengkajian dan Penerapan Teknologi (BPPT) Indonesia has developed composite technology for Pesawat Udara Nir Awak (PUNA) structural application. To establish a composite material database, a series of test was conducted on S-glass/epoxy composite materials with a variation of S-glass fiber orientation. The materials were fabricatied using a hand lay-up and followed by a vacuum bagging method; then density and fiber volume fraction measurement, as well as shear and bending testings were carried out. The composite failure surfaces after mechanical test were observed using Scanning Electron Microscope. The results showed that the 0°/90° fiber orientation composites had a better mechanical properties than the +/-45° fiber orientation composites, which shear strength, flexural strength, and flexural modulus were 25,38 MPa, 273,21 MPa, and 18,41 GPa respectively.

Abstrak :
ABSTRAK Penelitian mengenai penambahan serat baja ke dalam campuran beton telah menjadi sorotan beberapa dekade terakhir sejak pertama kali dipublikasikan pada tahun 1960. Beberapa penelitian bahkan telah mengaplikasikan beton berserat baja atau biasa disebut steel fiber reinforced concrete (SFRC) pada struktur pelat, dengan ataupun tanpa penambahan tulangan. Penelitian mengenai sifat mekanis material beton dengan berbagai proporsi pencampuran (mix design) telah dan akan terus dikembang di berbagai belahan dunia. Beberapa penelitian mengenai beton berserat baja ini bahkan telah diakui sebagai ASTM (American Standard Test Method) dan digunakan sebagai acuan metode pengujian di berbagai negara. Dalam penelitian ini, Pengujian pelat akan di lakukan berdasarkan volume fraksi steel fiber yang digunakan bervariasi diantara 0,19%; 0,32%; dan 0,51 % serta diamati pengaruhnya terhadap kuat tekan, kuat lentur, kuat tarik belah dan kuat geser. kuat tekan, kuat lentur, kuat tarik belah dan kuat geser bertambah seiring dengan pertambahan volume fraksi steel fiber dalam beton tersebut.

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ABSTRACT Research on addition of steel fiber into the concrete mixture has been in the spotlight the last decade since it was first published in 1960. Some studies have even applied steel fiberor so-called steel fiber reinforced concrete (SFRC) at the slab structure, with or without the addition of reinforcement. Research on the mechanical proporties of concrete materials with different propotions of mixing (mix design) has been and will continue to be developed in various part of the world. Some research on the steel finer concrete has even been recognized as an ASTM (American Standard Test Method) an used as reference test methods in various countries. In this study, Slab testing will be made based on the volume fraction of steel fiber used varies between 0,19%; 0,32%; 0,51% and the observed effect on compressive strength, flexural strength, split tensile strength and shear strength. Compressive strength, flexural strength, split tensile strength and shear strength increases with increasing volume fraction of steel fibers in concrete.