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All Journal PILAR Bulletin of Civil Engineering Jurnal Talenta Sipil Jurnal Sipil Terapan
Ibrahim Ibrahim
Jurusan Teknik Sipil, Politeknik Negeri Sriwijaya
Civil Engineering, Building, Construction & Architecture Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Transportation

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STABILISASI TANAH LEMPUNG DENGAN PENAMBAHAN LIMBAH SAWIT TERHADAP NILAI CALIFORNIA BEARING RATIO Ibrahim Ibrahim
PILAR Vol. 9 No. 2 (2013): PILAR 09092013
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Soil material that is very influential in the construction work, as an area of land will not have the same properties with other regions. Most areas in Indonesia, especially the city of Palembang on soft ground. Two main problems in soft soil is a huge drop and land carrying capacity is small. Strong bearing clays is strongly influenced by the water content, which when dry soil conditions have a strong high capacity and soil saturation conditions will have a lower carrying capacity. Large volume changes which can harm the soil so that the buildings need serious treatment. One soil improvement efforts is by using the additive stabilization of solid waste palm kernel. In this study the soil to be stabilized is clay derived from the Tanjung Api-Api, with the addition of the percentage of additive variation of solid waste palm kernel at 2.5%, 5%, 7.5%, 10% and 12.5% . The testing performed is testing soil physical properties (water content, grain grading, soil density, hydrometer analysis and Atterberg limits), and testing of mechanical properties of soil ie CBR (California Bearing Ratio). Percentage obtained in the research process LL value (65.19%) PL (34.90%) and IP (30.29%) while the percentage of the value of the fine fraction sieving size <0.075 mm (93.685%), and the size of the coarse fraction .0.075 mm (1.53%). Results of each percentage value according to the classification system USCS (Unified soil classification system) is included in the clay soil classification group OH ie organic clay with high plasticity to moderate. The addition of the additive causes soil properties LL (liquid limit) PL (plastic limit) increases so that IP (plasticity index) increases. The addition of the additive will affect the percentage of the value of the soaked and unsoaked CBR test. CBR value increased 7.5% and the percentage decrease in the percentage of 10% and 12.5%.
STABILISASI TANAH LEMPUNG DENGAN BAHAN KIMIA ASAM FOSFAT SEBAGAI LAPISAN FONDASI JALAN Ibrahim Ibrahim; Arfan Hasan; Yuniar Yuniar
PILAR Vol. 8 No. 1 (2013): PILAR 08032012
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Land is a part of the most structure as a foundation  that supporting the construction above it. The quality and durability of a construction can’t be separated from the nature of soil, some of them may cause problems.  These problems usually occurred because of the unstable soil condition. The settlement that have done so far is to fix the top layer of the road but it doesn’t solve the problem cause unstable road not only the structure on the road but also on the subgrade. The repair on the soft subgrade  cause water content can be done with stabilization. This research is analyze about behavior of clays  from Soekarno-Hatta Palembang which obtained  the density soil maximum and water content optimum with acid phosphate increment as 0% , 2.5% ,  5% , 7.5% , 10% and 12.5% of the land, and then do testing of index properties soil and California Bearing Ratio (CBR) test. From the research according to Unifed Soil Classification System (USCS) these soil at this area is included in the OH category, while according to American Association of State Highway an Transportation Officials (AASHTO) these soil is included in the A-7-5 category. The mixture soil with increment acid phosphate than original soil are showed that the liquid limid (LL) and plastic limid (PL) has decreased, it’s mean index plastic (IP) tended to decrease. CBR value with increament of additive tend to increase and attain a peak increase from 7.5% while 10% and 12.5 % decrease.
STABILISASI TANAH LEMPUNG DENGAN BAHAN ADITIF FLY ASH SEBAGAI LAPISAN PONDASI DASAR JALAN (SUBGRADE) Ibrahim Ibrahim
PILAR Vol. 10 No. 1 (2014): PILAR 10032014
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Some road construction in Indonesia built on expansive clay soil. Strong support is strongly influenced clay water content, in a dry state has a strong support and high in saturated state will have a strong low carrying capacity. Water content will affect the nature of the flower shrinkage and shear strength parameters of soil. Construction of roads built on clay soil often damaged, eg cracked or bumpy roads would be damaged so that road before reaching the age of the plan. To overcome the problems of the clay where the strong supporting affected by water content, one alternative be repaired by means of stabilization. This study analyzes the behavior of clay in the area of Tanjung Api Spinner - fire, get maximum soil density and optimum moisture content with the addition of fly ash (coal) 2.5%, 5%, 7.5%, 10% and 12.5%, then tested in the form of nature - the nature of the soil, the California Bearing Ratio (CBR) and unconfined compression(compressive streng this free). The results, according to the AASHTO classification including group A-7-6. The addition of fly ash will cause the properties of the soil liquid limit (LL) decreased with plastic limit (PL) decreased so that the plasticity index (PI) decreased, then the percentage of grains resulting in the fine fraction decreases with increasing clay gradation. The addition of fly ash will be working actively on the CBR test. It can be concluded that the fly ash work filling and covering the pores - pore soil thereby increasing soil kekedapan to the addition of water and increase soil strengthatsaturationwithoutchangingthephysicalpropertiesofsoil.
PENGARUH PERUBAHAN UKURAN MAKSIMUM AGREGAT KASAR TERHADAP JUMLAH SEMEN UNTUK PEMBUATAN BETON SCC DENGAN BAHAN TAMBAH SP430 DAN RP260 Amiruddin Amiruddin; Ibrahim Ibrahim; Ika Sulianti
PILAR Vol. 10 No. 2 (2014): PILAR 0902014
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Perkembangan teknologi beton saat ini menuju ke beton yang memiliki mutu yang tinggi dan juga memiliki kinerja tinggi (workability rendah). Beton jenis ini dikenal sebagai beton yang dapat memadat sendiri (SCC: Self Compacting Concrete) yang saat ini telah dikenal luas di Jepang, Eropa dan Amerika.Untuk menunjang kinerja beton menjadi tinggi, maka digunakan ukuran agregat kasar yang lebih kecil (maksimum 10 mm) dan untuk mendapatkan workability dan viscositas yang baik dibutuhkan  penambahan aditif.Pada penelitian ini dihasilkan diantaranya pada perubahan ukuran agregat menjadi maksimum 10 mm maka dibutuhkan penambahan semen sebanyak 15%. Untuk penyesuaian komposisi sesuai syarat komposisi  beton SCC maka dibutuhkan penambahan semen menjadi total 22%, serta untuk memenuhi workability yang rendah dibutuhkan penambahan aditif jenis RP260 dan SP430 yang masing – masing 1,5 lt/m3 beton.
PENGARUH NILAI CBR DAN KUAT GESER TANAH GAMBUT YANG DI STABILISASI MENGGUNAKAN PETRASOIL DENGAN SEMEN PORTLAND ( 15-20 ) Hasyyati Ishmah; Vinny Alvionita; Andi Herius; Ibrahim Ibrahim
PILAR Vol. 14 No. 1 (2019): Pilar: Maret 2019
Publisher : Politeknik Negeri Sriwijaya

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Abstract

Tanah gambut merupakan tanah organik yang secara fisik dan teknik kurang memenuhi persyaratan dan ketentuan dalam pekerjaan konstruksi, karena tanah gambut memiliki kandungan air dan kompresbilitas yang sangat tinggi serta mempunyai kapasitas dukung tanah yang rendah.Dengan berbagai alasan dan pertimbangan pekerjaan konstruksi diatas endapan gambut sering terpaksa dilakukan, terutama untuk pembangunan jalan raya.Maka salah satu cara mengatasi masalah ini perlu dilakukan perbaikan dengan cara stabilisasi tanah. Stabilisasi tanah gambut antara lain dengan mencoba menambahkan bahan campuran berupa petrasoil dan semen.Pada penelitian ini tanah gambut diambil di daerah Jalan Lintas Timur Inderalaya yang distabilisasi dan di tes menggunakan uji sifat fisis dan mekanis seperti pengujian Berat Jenis, Batas-batas Konsistensi, Analisa Saringan, Hidrometer, Pemadatan standar, California Bearing Ratio, serta Kuat geser. Variasi penambahan semen 5 %; 10 %; 15 %; 20%, sedangkan campuran petrasoil adalah dengan perbandingan (1:75). Dari hasilkadar air optimum melalui uji pemadatan, dilakukan pengujian California Beraing Ratio dan Kuat geser untuk melihat pengaruh pada setiap penambahan semen dan petrasoil terhadap tanah gambut.Hasil penelitian menunjukkan perbaikan pada sifat fisis dan meningkatkan nilai California Bearing Ratio dan Kuat geser
PENGARUH KUAT TEKAN BETON DENGAN MENGGUANKAN BAHAN LIMBAH CUP PLASTIK (21-25) Kosim Kosim; Ibrahim Ibrahim; Tri Sartika; Moudy Yustika Savira
PILAR Vol. 16 No. 1 (2021): Pilar: Maret 2021
Publisher : Politeknik Negeri Sriwijaya

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ABSTRACTConcrete is a building material that consists of aggregates, water, and cement. The advantage of concrete as building structure material is have a high compressive strength, while the weaknes is low tensile strength. Along with the increasing uses of concrete in development, more efforts have been made to improve the quality of concrete or reduces the weakness. Many innovations have been made, such as by adding fiber and one of them from plastic cup waste. In this research, concrete with quality plan fc’22,5 was added with a count of Polyetylene Terephthalate (PET) type plastic cup waste with a percentage on mixture are 0 %, 0,1 %, 0,3 %, 0,5 %, 0,7 % and 0,9 % to the volume of fine aggregate with 3 samples of concrete cylinder by varying the age of care which is 3 days, 14 days, and 28 days. This mixture of plastic cup will become fiber concrete which will increase the compressive strength of the concrete. The results of the average compressive strength of the concrete were at the percentage of 0% is 24,02 MPa, at the percentage of 0,1 % is 19,55 MPa, at the percentage of 0,3 % is 23,53 MPa, at the percentage of 0,5 % is 24,20 Mpa, at the percentage of 0,7 % is 20,23 Mpa, and at the percentage of 0,9 % is 14,54 Mpa. The results of the compressive strength test of the concrete that using the plastic cup waste material increased by 0,16 % from normal concrete at percentage of 0,5 %.
Simulasi Back Propagation Dalam Prediksi Data Kunjungan Kapal Dalam dan Luar Negeri Sumatera Selatan Tahun 2019 sampai 2021 Fadhila Firdausa; Ibrahim Ibrahim; Andi Herius; Hakas Prayuda
Bulletin of Civil Engineering Vol 2, No 2 (2022): Agustus
Publisher : Civil Engineering Department, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/bce.v2i2.15618

Abstract

Kondisi Sumatera Selatan yang memiliki sungai musi yang panjang dan berbatasan dengan. Kepulauan Bangka Belitung membuat perjalanan lalu lintas keairan menjadi perhatian penting. Selain itu hasil sumber daya Sumatera Selatan berupa minyak, gas alam, dan batu bara dan lain-lain menjadi pusat industri yang pemasarannya melalui jalur darat dan laut. Berdasarkan hasil ekspor import pelabuhan Boom Baru merupakan akses ekspor import terbesar di Sumatera Selatan. Oleh karena hal itu kunjungan keluar masuk kapal dalam dan luar negeri harus dilakukan dengan seksama dan terekam secara baik. Back Propagation merupakan simulasi buatan yang dibuat berdasarkan system kerja jaringan syaraf tiruan. Simulasi ini meniru data input yang dimasukkan sehingga menghasilkan data output yang mendekati hasil dari data input. Simulasi ini juga memiliki kecanggihan berupa menirukan data range yang berada diantara data input. Sehingga memudahkan dalam memprediksi data yang tidak ada didalam data input. Data kunjungan kapal dalam dan luar negeri diambil dari data Badan Pusat Statistik Sumatera Selatan dari tahun 2019 sampai 2021. Hasil simulasi Back Propagation untuk data kunjungan dalam negeri yang menghasilkan eror terkecil 0,92% dengan trial epoch sebanyak  175693 dan mengalami eror data di 53%. untuk data kunjungan luar negeri yang menghasilkan eror terkeci 1,44% dengan trial epoch sebanyak 189367 dan mengalami eror data di 73%. Dapat disimpulkan bahwa simulasi Back Propagation mampu memprediksi data kunjungan kapal dalam  dan luar negeri.
Pengaruh Penambahan Aditif Sikament-Ln terhadap Kuat Tekan Beton Mutu Tinggi dengan Variasi Nilai Slump Ibrahim Ibrahim; Kosim Kosim; Firdha Razhanah; Reynaldy Aji Nugraha; R. Reza Fahruddin
Jurnal Talenta Sipil Vol 6, No 2 (2023): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v6i2.332

Abstract

High-strength concrete listed in SNI 03-6468-2000 concrete is defined as concrete having the required compressive strength of fc'≥ 41 Mpa. From this study, data obtained from the compressive strength of concrete at the age of 28 days as follows: the value of the normal concrete compressive strength of 41.72 MPa, the compressive strength of the Sikament-ln mixture of 0.6% slump 5 of 45.65 MPa, the compressive strength of the Sikament-mixed concrete. -ln 1% slump 6 of 47,38 MPa, compressive strength of mixed concrete Sikament-ln 1.4% slump 7 of 44.20 MPa, compressive strength of mixed concrete of Sikament-ln 1.8% slump 8 of 45.65 MPa 38 ,65MPa. It can be seen from the results of this study that the ideal compressive strength is the compressive strength of the Sikament-ln mixture of 1% slump 6 this is because the compressive strength value is much greater than the compressive strength without the Sikament-ln mixture.
Investigating the Effect of Cement Bentonite Stabilized Soft Clay on Mechanical Behavior Under Unconsolidated Undrained Triaxial Loading Dhevi Mulyanda; Ibrahim Ibrahim; Rajinda Syadzali Bintang; Arasit Pratama; M. Ryadya Tantra Paganini
Jurnal Sipil Terapan Vol. 4 No. 2 (2026): November: Jurnal Sipil Terapan
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/jusit.v4i2.1225

Abstract

Soft clay is characterized by low shear strength and high compressibility. Chemical stabilization using cement and bentonite can improve soil index and mechanical properties through modifying hydraulic characteristics and soil structure. This study aims to investigate the effect of cement – bentonite combinations on the shear strength behavior of soft clay and identify the optimum mixture. Experimental investigation are conducted using the unconsolidated undrained (UU) triaxial test to evaluate the mechanical response of stabilized soil under rapid loading. Several mix composition has designed to determine the optimum mixture.  A total of 36 soil samples of  20% cement and bentonite content addition  varied from  8%, to 12% in 1% increment will be tested under confining pressures of 100, 200, and 300 kPa. The results show that maximum deviator stress increased with confining pressure whereas its relationship with bentonite was non linier. The mixture at 9% bentonite performed the highest maximum deviator stresses at all confining pressures reaching 390, 450, and 573 kPa, respectively. Further increases in bentonite content beyond 9% resulted in lower maximum deviator stress. The failure envelope analysis also indicates that increasing bentonite does not improve shear strength. Through this investigation, 9% bentonite showed the best shear – strength performance among the tested mixture. These findings highlight the importance of optimizing addiyive content to produce better mechanical performance.
Co-Authors Amiruddin Amiruddin Andi Herius Arasit Pratama Arfan Hasan Dhevi Mulyanda Fadhila Firdausa Firdha Razhanah Hakas Prayuda Hasyyati Ishmah Ika Sulianti Kosim Kosim Kosim Kosim M. Ryadya Tantra Paganini Moudy Yustika Savira R. Reza Fahruddin Rajinda Syadzali Bintang Reynaldy Aji Nugraha Tri Sartika Vinny Alvionita Yuniar Yuniar