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Universitas Krisnadwipayana
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ANALYSIS OF CONCRETE COMPRESSIVE STRENGTH AGAINST BAMBOO FIBER WASTE FARHAN HAWARI; GALI PRIBADI; YONAS PRIMA ARGA RUMBYARSO
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 02 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - MAY -AUGUST 2025
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Concrete is a primary construction material consisting of a mixture of cement, water, sand, and aggregate, and often includes additives to improve specific properties such as workability, durability, and setting time (McCormac, 2004). Bamboo fibers, which have a compressive strength of 45.4 MPa (Afdal, 2016) and contain hydroxyapatite (HA), are used as an additive in concrete to improve performance. This study tested the compressive strength of normal concrete and concrete with bamboo fiber variations of 2%, 4%, and 6% at ages of 7, 14, and 28 days, each with two samples per variation (total of 24 test specimens). The test results showed that at 7 days, the 6% variation exhibited the highest compressive strength increase (20.42 MPa) compared to normal concrete (16.37 MPa). However, at 14 and 28 days, only the 6% variation again showed an increase in compressive strength (22.64 MPa), while the 2% and 4% variations tended to decrease compared to normal concrete.
Analisis Struktur Bangunan Pada Gedung Kantor Proklamasi Jakarta Pusat Musalfi, Nur Liza Nasyira; Pribadi, Gali; Siagian, Bermando Mangatur
Jurnal Anggapa Vol 4 No 1 (2025): ANGGAPA Volume 3 No 1 April 2025
Publisher : Faculty of Engineering, Widya Kartika University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61293/anggapa.v4i1.696

Abstract

Indonesia merupakan salah satu negara di Asia Tenggara yang wilayahnya terletak di Cincin Api Pasifik, sebuah wilayah dengan pergerakan lempeng paling aktif di muka bumi. Hampir seluruh wilayah Indonesia dilintasi oleh dua rangkaian pegunungan termuda di dunia, yaitu Pegunungan Lingkar Mediterania di sebelah barat dan Pegunungan Lingkar Pasifik di sebelah timur, namun Kalimantan merupakan satu-satunya pulau yang tidak memiliki gunung berapi. Keberadaan kedua jalur tersebut menjadi penyebab banyaknya gunung aktif penyebab gempa di Indonesia. Metode analisis dinamik yang digunakan yaitu analisis ragam respons spectrum. Tujuan penelitian ini adalah menganalisis gaya geser balok dan menganalisis rasio tulangan balok. Metodologi penelitian menggunakan ETABS V. 21.1.0. Berdasarkan metode penelitian pada Gedung Kantor Proklamasi Jakarta Pusat pada Tugas Akhir ini diperoleh hasil dari output ETABS V.21.1.0. didapat nilai gaya geser dan nilai gaya momen arah X dan arah Y pada lantai 6. Nilai gaya geser terbesar arah X yaitu 1,8644 kN dan nilai momen terbesar arah X yaitu 0,4621 kN-m. Kemudian nilai gaya geser terbesar arah Y yaitu 7,0843 kN dan nilai momen terbesar arah Y yaitu 1,7656 kN-m. Perhitungan rasio manual, tulangan dengan D19 diperlukan 6 batang. Dengan AS minimal 720 mm2. Kemudian tulangan dapat dipasang n < m, jadi dipakai B79 = 6D19.
UTILIZATION OF GYPSUM POWDER WASTE AS A SUBSTITUTE FOR PART OF CEMENT IN POROUS CONCRETE COMPRESSIVE STRENGTH AGA PRIATNA; YONAS PRIMA ARGA RUMBYARSO; GALI PRIBADI
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 03 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - EDITION SEPTEMBER - DECEMBER 2025
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Porous concrete is used in infrastructure projects that require water absorption, supporting green cities and sustainable development. Its composition differs from conventional concrete because it has minimal or no fine aggregates, thus forming pores. This study aims to compare the compressive strength of normal porous concrete with porous concrete in which some of the cement is replaced with gypsum board waste powder. Testing was conducted at 7, 14, and 28 days to determine the effect of waste on concrete strength development. Compressive strength testing of porous concrete with varying amounts of gypsum powder waste showed that at 0% composition, the results at 7 and 14 days met the SNI 1974: 2011 standard. However, at 5% and 10% composition, the results at 7 days only partially met the standard, while at 14 days they were below the minimum limit of 88%. This indicates a decrease in compressive strength performance as the percentage of gypsum waste increases.
ANALYSIS OF THE USE OF RUBBER SANDAL WASTE AS A SUBSTITUTE FOR SOME OF THE COARSE AGGREGATE IN CONCRETE AMELIA PUTRI SAMANHURI; GALI PRIBADI; GITA PUSPA ARTIANI
INTERNATIONAL JOURNAL OF MULTI SCIENCE Vol. 5 No. 03 (2025): INTERNATIONAL JOURNAL OF MULTISCIENCE - EDITION SEPTEMBER - DECEMBER 2025
Publisher : CV KULTURA DIGITAL MEDIA

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Abstract

Based on SNI 1974: 2023, concrete is a composite material that hardens over time and has compressive strength at 28 days. Concrete is widely used because of its advantages, despite its disadvantages such as weight, cracking, and high formwork costs. This study reviews rubber sandal waste as a substitute for coarse aggregate at 15% and 30% to reduce the weaknesses of concrete. The background is the growth of industry, particularly the rubber sandal industry, which produces large amounts of waste. The test results show that concrete without waste (0%) achieved a compressive strength of 18.94 MPa (7 days) and 34.74 MPa (14 days), exceeding the SNI 1974: 2023 limit. With a rubber sandal waste composition of 15%, the compressive strength was 16.65 MPa (7 days) and 21.24 MPa (14 days), only meeting the 7-day requirement. The 30% composition showed similar results. This means that the use of rubber sandal waste up to 30% reduces compressive strength performance at 14 days.
Analisis Subtitusi Limbah Plastik (LDPE) terhadap Karakteristik Marshall Pada Campuran Laston AC-WC Pribadi, Gali; Indriasari, Indriasari; Rahman, Rafi Luthfir
Jurnal Kridatama Sains dan Teknologi Vol 5 No 02 (2023): JURNAL KRIDATAMA SAINS DAN TEKNOLOGI
Publisher : Universitas Ma'arif Nahdlatul Ulama Kebumen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53863/kst.v5i02.945

Abstract

Waste which is a disposal material from production, both from nature and human activities that are not used, can cause heaps and piles of waste that some cannot be recycled, so that it can have a negative impact on society if it is not managed properly. Therefore, the authors use waste as a mixture in making laston or AC-WC. In this study used plastic waste type Low Density Polyethylene (LDPE) which is often found in the surrounding environment. The asphalt layer used is Laston Wearing Course (AC-WC) which is commonly used for high traffic levels. Variations in the levels of plastic waste used are 0%; 5%; 7.5%; 10% of the total weight of the asphalt plan. The stages in this research include the physical test of the material, checking the AC-WC specifications referring to the general specifications of Bina Marga 2018, and Marshall testing. The method used in this research is the wet method. The results of this study found the optimum asphalt content used as a mixture with the addition of LDPE plastic waste, namely 6.3% asphalt content. Marshall test results show a better level of stability than conventional asphalt. This can be proven by the results of testing using Marshall. the average stability value is 1,884,53kg. Where this value increases compared to the stability value in the mixture without the addition of LDPE which is 1,787,39 kg.Keywords: Asphalt Concrete Wearing Course, Low Density Polyethilene (LDPE), Marshall Parameters
Model Perkuatan Anyaman Bambu pada Subgrade Bungker Tangki Pendam Pribadi, Gali; Rumbyarso, Yonas Prima Arga
Jurnal Ilmiah Universitas Batanghari Jambi Vol 24, No 3 (2024): Oktober
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v24i3.5594

Abstract

A submersion tank bunker is a storage place for fuel oil tanks at public fueling stations (gas stations). Its function is to localize oil splatters so as not to pollute the soil below if there is a leak in the oil tank. The construction of the submersion tank bunker at the Kelapa Gading gas station in North Jakarta, the basic soil condition is muddy due to low groundwater. This condition is improved by applying a covering layer of bamboo mattress. Bamboo mats are made from wormwood bamboo (Gigantochloa Apus) which is split 5 cm wide each sheet, and then woven to form a woven grid. The presence of groundwater at the bottom of the excavation, drained by pumping out (dewatering). After laying sand, the next step can be casting the bunker concrete floor slab. It is proven that woven bamboo in the form of bamboo mattresses is an alternative to basic soil improvement that can increase the carrying capacity of basic soil effectively.
Analisis Profil Atap Baja WF dengan Metode LRFD Menggunakan SAP 2000 dan Idea StatiCa Pribadi, Gali; Rumbyarso, Yonas Prima Arga
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 6 No. 4 (2023): Oktober
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v6i4.21662

Abstract

The roof is one of the main components in a building to protect it from heat and rain. The roof is also an architectural component that adds to the beauty of a building. Therefore, every building must have a roof. Currently, many steel roofs are used as the structural frame. Considering that wooden materials are considered expensive to use nowadays. Apart from that, steel material has a longer durability than wood material, so steel is considered the best alternative at the moment. The title of this article is "Structure Analysis of WF Steel Profile Roofs Using the LRFD Method". This analysis was carried out to determine the strength of the WF steel truss structure and its connections. The analysis method used in this research is the LRFD method which is carried out with the help of the SAP 2000 v20 program to calculate the statics of the roof construction and using the help of the Idea StatiCa program to calculate the connections. Based on the results obtained, the trusses that use the WF 200.100.5,5.8 profile are able to withstand the forces acting on the truss structure, and the connections are sufficient to withstand the forces that occur.  
Analysis of Landslide Handling With Mini Pile Reinforcement Using Plaxis Software on The “X” Toll Road Project Rumbyarso, Yonas Prima Arga; Pribadi, Gali
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 7 No. 2 (2024): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v7i2.27026

Abstract

The Semarang-Demak Toll Road faces geotechnical problems due to geological conditions that include hilly areas and basins, with bedrock such as claystone, shale, and lignite that are prone to weakening. A landslide occurred at the Semarang-Demak Toll Road site between Sta. 1+250 and Sta. 2+715, despite various methods of embankment work that were not entirely successful, therefore causing damage. The analysis showed a discrepancy between the theoretical factor of safety and the actual landslide condition, requiring slope reinforcement technology such as mini piles that effectively inhibit soil movement. Mini piles, in the form of reinforced concrete with a length of 7 to 10 meters and a spacing of 2 meters between piles, plus the use of geotextiles, analyzed using the Plaxis 2D program showed an increase in the factor of safety. Although there were slight differences between the reinforcement models, the combination of mini piles and geotextiles proved effective, especially when placed in hard soil layers or over soft soil at a depth of 7 meters from the surface, overcoming the embankment loads at the site.
PERENCANAAN SUMUR RESAPAN UNTUK PENGENDALIAN BANJIR DI WILAYAH KECAMATAN PASAR REBO, JAKARTA TIMUR Artiani, Gita Puspa; Rodji, Achmad Pahrul; Sihombing, Sahat Martua; Arga, Yonas Prima; Pribadi, Gali
Abdimas Galuh Vol 5, No 2 (2023): September 2023
Publisher : Universitas Galuh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25157/ag.v5i2.10195

Abstract

Kecamatan Pasar Rebo merupakan salah satu kecamatan di Kota Administrasi Jakarta Timur yang terletak antara 106049’35” Bujur Timur dan 06010’37” Lintang Selatan, Luas wilayah kecamatan ini seluas 12,98 km2 (6,88 persen dari luas wilayah Kota Jakarta Timur) yang terbagi dalam 5 (lima) kelurahan meliputi: Kelurahan Baru, Kelurahan Cijantung, Kelurahan Gedong, Kelurahan Kalisari, dan Kelurahan Pekayon. Kecamatan Pasar Rebo termasuk kedalam kawasan rawan pergesaran tanah berdasarkan data Badan Penanggulangan Bencana Daerah (BPBD) DKI Jakarta. Pada tanggal 10 Oktober 2020, banjir akibat hujan deras berada di jalan Lewa  RT 14 RW 08 Kelurahan Pekayon setinggi 50 sentimeter, jalan Swadaya dan jalan Karya Bakti RT 10 RW 11 Kelurahan Cijantung setinggi 1,2 meter, dan jalan Cakrabuawana dan Manunggal Kelurahan Kalisari 1 meter. Permasalahan ini tidak terlepas terhadap belum terintegrasi sistem drainase dengan baik, perilaku masyarakat membuang sampah, pendangkalan saluran, kepadatan bangunan menyebabkan tidak terdapat resapan air, dataran rendah. Sumur resapan adalah salah satu konsep sederhana yang efektif untuk mengurangi aliran permukaan yang dapat menyebabkan banjir dan merupakan kegiatan konservasi sipil teknis sederhana berupa sumuran yang berfungsi untuk menampung, menahan dan meresapkan air permukaan (run-off) ke dalam tanah (akuifer) untuk meningkatkan jumlah dan posisi muka air tanah. Adapun hasil dari pengabdian kepada masyarakat ini berupa kegiatan FGD yang kemudian menjadi bahan pertimbangan untuk finalisasi pembuatan rekomendasi konsep dalam pembuatan desain saluran drainase selanjutnya untuk mendorong pihak-pihak terkait sesuai bidangnya (OPD Pemda), untuk mewujudkan sumur resapan sebagai usulan program kegiatan.
Analisis Kapasitas Daya Dukung Bore Pile Pada Proyek Gedung Fakultas Hukum Unisulla Semarang Jawa Tengah Arga Rumbyarso, Yonas Prima; Pribadi, Gali
Pasak: Jurnal Teknik Sipil dan Bangunan Vol 2 No 1 (2024): September
Publisher : Fakultas Teknik dan Ilmu Komputer Universitas Sains Al-Quran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/pasak.v2i1.6976

Abstract

Pondasi memiliki peran krusial dalam konstruksi teknik sipil karena bertugas menopang beban struktural di atasnya. Pondasi tiang bor atau bored pile merupakan jenis pondasi yang dipasang dengan cara mengebor tanah sebelum diisi tulangan dan beton. Penelitian ini bertujuan untuk menganalisis daya dukung pondasi bored pile berdasarkan data Standard Penetration Test (SPT). Dalam analisis ini, digunakan metode Mayerhoff untuk perhitungan SPT dan metode Poulo dan Davis untuk mengukur penurunan bored pile, dengan perbandingan hasil simulasi menggunakan software Plaxis 3D. Pengumpulan data dilakukan melalui observasi, serta mengambil informasi dari kontraktor pelaksana dan studi literatur. Hasil perhitungan menunjukkan variasi pada jenis tanah, tingkat kepadatan, dan kedalaman tanah. Meski ada perbedaan antara perhitungan teoretis dan praktik di lapangan, perbedaan tersebut tidak signifikan karena penggunaan formula yang beragam. Daya dukung yang dihitung lebih kecil dari hasil perencanaan, menunjukkan bahwa desain pondasi dengan diameter 50 cm dan kedalaman 27,5 m cukup aman untuk konstruksi Gedung Fakultas Hukum Universitas Islam Sultan Agung di Semarang, Jawa Tengah. Penelitian ini berfokus pada analisis dan perbandingan antara daya dukung dan penurunan yang terjadi pada pondasi bored pile proyek tersebut.
Co-Authors Achmad Pahrul Rodji Achmad Romadonsyah AGA PRIATNA AMELIA PUTRI SAMANHURI Ardiansyah Arga, Yonas Prima Artiani , Gita Puspa Awaludin, Latief Darmiyanti, Lydia Dermawan, Muhammad Jagat Essy Malays Sari Sakti FAIZAL ADDIN ACHMAD Faizal Addin Achmad FARHAN HAWARI GIFTY CAHYANI Gita Puspa Artiani Gita Puspa Artiani, Gita Puspa Hartanto, Bilhan Gamaliel Ikhwan, Bima Khairul Indriasari indriasari Koesno Indriasari, Indriasari Ismail Lydia Darmiyanti Lydia Darmiyanti M RIFQI BADRIANSYAH MARLIANA PUTRI Martinus Martinus Muhammad Jamaludin Musalfi, Nur Liza Nasyira Nusa Setiani Posasi, M Albi Aditya Rahman, Rafi Luthfir RAZAK MOHAMADHAN Rodji, Achmad Pahrul Sahat Martua Sihombing Samudra, Muhammad Gilang Siagian, Bermando Mangatur Sihombing, Sahat Martua SUDANA SUDANA Syaiydah Salsabilla Tomy Friendo Purba Yonas Prima Arga Rumbyarso