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All Journal Potensi : Jurnal Sipil Politeknik Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil
Sulaiman, Suherman
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Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Kinerja Struktur Perkerasan Aspal Porus Modifikasi dengan Pemodelan Program KENPAVE: Performance of Modified Porous Asphalt Pavement Structures Using the KENPAVE Program Modeling Aszharri, Arief; Susetyo, Dimas Ariezky; Sulaiman, Suherman
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol. 13 No. 2 (2024): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35139/cantilever.v13i2.363

Abstract

Flexible pavement planning methods can be classified into five categories, namely empirical methods, methods for limiting shear failure, methods for limiting deflection, regression methods based on pavement performance or road tests and empirical mechanistic methods. Pavement design procedures can be modeled as several layers or viscoelastic structures in an elastic band. By estimating that the pavement structure is like this, it is possible to calculate the stresses, strains, or deflections caused by traffic loads and environmental factors. This research will evaluate the construction structure of a porous asphalt mixture using cariphalte modified asphalt and the addition of gilsonite on a road section with a high traffic volume with an LHR above 50,000 pavement vehicles so that the thickness of the pavement structure layer will be obtained and then evaluated using the KENPAVE program. The results of this study show that the structural performance of porous asphalt mixtures with the addition of gilsonite in the pavement structure increases not significantly with increasing permit repetition loads at fatigue crack damage criteria of 0.5% and 0.45% for segment 4 and segment 5 respectively. Segment 3 showed a significant increase in the permit repetition load of 26.3% compared to the normal mixture. The structural performance of porous asphalt mixtures with the addition of gilsonite in the pavement structure increases insignificantly with the increase in the repetition permit load on the criteria for used grooves from vehicle wheels by 0.42% and 0.74% respectively for segment 4 and segment 5. However, in segment 3, there was a significant increase in the permit repetition load of 30.5% compared to the normal mixture.
Analysis of Permeability Coefficient on Stabilished Peat using Bacillus Subtilis Bacteria Khoerani, Annisa; amalia, dewi; Sulaiman, Suherman
Potensi: Jurnal Sipil Politeknik Vol. 26 No. 2 (2024): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v26i2.5825

Abstract

In construction sector, peat is one type of soil that is avoided because it has poor characteristics. This is because peat has very different characteristics when compared to other types of soil. Poor peat characteristics often lead to damage and construction failure of infrastructure buildings on peat. For example, large settlement values are caused by high peat compression that strongly influenced by its permeability value. The smaller the permeability value, the smaller the compression that occurs. Indonesia has the largest peatland distribution in Southeast Asia, this is a problem that must be resolved immediately. Much research has been done to improve the characteristics of peat, one of which is peat stabilization. Microbially Induced Calcite Precipitation (MICP) method using Bacillus subtilis was considered as an effective method in peat stabilization. This stabilization can reduce the permeability value of the peat by closing the pores in the peat. To investigate the influence of the bacteria on the peat sample, several tests was conducted including the physical property and permeability test. In this study, the addition of Bacillus subtilis bacteria solution can reduce the permeability value of peat from 0.001170 cm/sec to 0.000317 cm/s at the addition of 5% bacteria solution.
PERBANDINGAN KARAKTERISTIK GAMBUT PALANGKARAYA YANG TELAH DISTABILISASI DENGAN BAKTERI BACILLUS SUBTILIS Khoerani, Annisa; Amalia, Dewi; Sulaiman, Suherman
Potensi: Jurnal Sipil Politeknik Vol. 25 No. 2 (2023): Potensi: Jurnal Sipil Politeknik
Publisher : Department of Civil Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v25i2.5824

Abstract

Indonesia merupakan negara dengan sebaran gambut terbanyak di Asia Tenggara. Luas lahan gambut di Indonesia mencapai 13.43 juta hektar yang tersebar di empat pulau besar di Indonesia. Pembangunan infrastruktur di lahan gambut memiliki banyak resiko karena karakteritik gambut yang buruk, seperti kadar air dan kadar serat yang tinggi, hingga daya dukung yang rendah. Oleh karena itu pada saat ini banyak penelitian yang dilakukan untuk meningkatkan karakteristik gambut berupa stabilisasi, hanya saja stabilisasi yang dilakukan banyak menggunakan bahan kimia yang dapat mencemari lingkungan. Pada dewasa ini, stabilisasi dengan bakteri dianggap lebih ramah lingkungan seperti stabilisasi dengan metode Microbially Induced Calcite Precipitation (MICP) menggunakan bakteri Bacillus subtilis. Proses stabilisasi dengan penambahan 7.5% larutan bakteri dapat meningkatkan kuat geser gambut dari 17.693 kPa menjadi 24.047 kPa. Peningkatan kuat geser pada gambut diikuti dengan perubahan karakteristiknya. Gambut yang berasal dari Kota Palangkaraya, Kalimantan Tengah memiliki karakteristik sebagai gambut berserat tipe hemic dengan kandungan abu yang tinggi kadar organik yang tinggi, tingkat keasaman yang tinggi, serta kemampuan penyerapan air yang sedang. Setelah dilakukan stabilisasi didapatkan karakteristik gambut menjadi gambut tidak berserat tipe sapric dengan kadar abu yang tinggi, kadar organik yang rendah, tingkat keasaman yang sedang, serta kemampuan penyerapan air yang rendah.
Co-Authors Aszharri, Arief Dewi Amalia Khoerani, Annisa Susetyo, Dimas Ariezky