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All Journal Jurnal Teknik Sipil Jurnal Tekno Global
Utari Sriwijaya Minaka
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Civil Engineering, Building, Construction & Architecture

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Analisis Parameter Dinamik Tanah pada Tanah Pasir yang Berpotensi Likuifaksi Utari Sriwijaya Minaka; Ghina Amalia
Jurnal Tekno Global Vol. 11 No. 2
Publisher : UNIVERSITAS INDO GLOBAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36982/jtg.v11i2.2933

Abstract

Shear modulus and damping ratio are two well-known dynamic properties of soil when subjected to cyclic loading. These values are influenced by several things, including groundwater level and soil stiffness. Since soil dynamic properties value varies by liquefaction, there is a need for laboratory research to specifically investigate the effect of degree of saturation and number of loads on shear modulus and damping ratio of sand. Cyclic Triaxial and Centrifuge tests were conducted to determine shear modulus and damping ratio under cyclic loading. For the Cyclic Triaxial test, Sekarsuli sand with 49,20% density, 50%, 75%, 100% degree of saturation, and two types of loading (10 and 20 cyclic) were used. Centrifuge test was conducted using 4 layers of Toyoura sand with 60% density, fully saturated, and two types of shaking (24 Hz and 30 Hz). The results revealed that shear modulus value increased as depth increased. The greater the number of cyclic applied, the shear modulus value increased, while the value of the damping ratio decreased. Centrifuge test also showed that, under fully saturated condition, the greater load applied, soil stiffness gradually decreased and shear strain increased. This resulted in the decrease in shear modulus and increase damping ratio value.
PENGARUH VARIASI PENGGUNAAN SERAT POLYPROPYLENE TERHADAP UJI KUAT TARIK BELAH BETON RINGAN Agus Dwianto; Sartika Nisumanti; Utari Sriwijaya Minaka
Jurnal Teknik Sipil Vol 7 No 1 (2023): Jurnal Gradasi Teknik Sipil - Juni 2023
Publisher : P3M Politeknik Negeri Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31961/gradasi.v7i1.1407

Abstract

Beton ringan dihasilkan dengan cara pengurangan agregat kasar sehingga beton akan berpori atau berongga dan menghasilkan berat yang ringan. Untuk meningkatkan mutu beton tersebut maka ditambah material tambahan yaitu serat polypropylene (sejenis plastik mutu tinggi). Penelitian ini bertujuan untuk mengetahui pengaruh serat polypropylene sebagai material tambahan pada kuat tarik belah beton ringanserta mengetahui kadar persentase penambahan serat polypropylene paling optimum. Metodologi yang digunakan adalah eksperimen yang merupakan metode penelitian untuk mengetahui pengaruh tertentu. Penelitian ini menggunakan 3 variasi campuran dengan persentase 0.25%, 0.50%, 0.75% dengan jumlah benda uji 36 buah dan umur penggujian dimulai dari 7 hari, 14 hari serta 28 hari. Dari hasil pengujian uji kuat tarik belah didapat hasil pengujian umur 28 hari beton normal sebesar 1.38 MPa pada penambahan serat dengan variasi 0.25%, 0.50% serta 0.75% sebesar 1.54 MPa, 1.49 MPa dan 1.43 MPa. Didapat nilai optimum pada persentase 0.25% sebesar 1.54 MPa
Co-Authors Agus Dwianto Ghina Amalia Nisumanti, Sartika