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Dian Nusantara University
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Experimental Testing of Natural Fiber on Asphalt Mix Performance Alizar Alizar; Slamet Imam Wahyudi; Rachmat Mudiyono
Ranah Research : Journal of Multidisciplinary Research and Development Vol. 7 No. 1 (2024): Ranah Research : Journal Of Multidisciplinary Research and Development (Novembe
Publisher : Dinasti Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38035/rrj.v7i1.1189

Abstract

The performance of road pavements in Indonesia pays great attention to durability and high safety for users, considering the high rate of traffic growth every year. Utilizing natural fibers which are abundant in Indonesia in a hot mixed asphalt is one solution. This can be an alternative to asphalt content which will protect the pavement from damage, especially the surface layers which experiences collapse due to traffic loads and changes in temperature 20-50 °C. The characterization study of natural fiber in asphalt pavement is critical point for accurate fiber mixing to increase the performance of asphalt as a road surface layer. The objective of this study is evaluation the characterization and performance of three natural fibers namely coconut fiber, rice straw and palm fiber in mixtures of asphalt penetration 60/70. In this study, a mixture of asphalt with natural fibers were produced with a length variation of 2-5 mm. Diameter varied from 0.1-0.7 mm. The variation of fiber size was conducted to determine its effect on the asphalt characteristics. The addition of 0.1%, 0.2%, 0.3%, 0.4% and 0.5% fibers into asphalt pen 60/70 mixture changed the characteristics of the asphalt with wet process mixing 500 rpm in temperature 110oC. The results of characteristic test demonstrate that tensile strength of natural fibers 2.34 – 217.3 N/mm2. The asphalt concrete containing with 0.2% - 0.3% natural fibers showed value of Marshall Stability, Marshall Quotient and Marshall Immersion is significant in of performance asphalt concrete and this method can improve the quality of asphalt mixture.
Penerapan Building Information Modeling (BIM) Dalam Estimasi Quantity Take Off Material Pekerjaan Struktural Pada Pembangunan Gedung Kondominium Hotel 8 Lantai Heri Permana; Rifaldi Adi Saputra; Alizar Alizar
Cerdika: Jurnal Ilmiah Indonesia Vol. 5 No. 2 (2025): Cerdika: Jurnal Ilmiah Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/cerdika.v5i2.2533

Abstract

Penelitian ini bertujuan untuk mengkaji penerapan Building Information Modeling (BIM) dalam proses perhitungan Quantity Take Off (QTO) pada konstruksi struktur bangunan bertingkat, serta mengidentifikasi manfaat yang diperoleh dari penggunaan BIM. Jenis penelitian yang digunakan adalah penelitian kuantitatif dengan pendekatan studi kasus. Populasi dalam penelitian ini adalah proyek konstruksi bangunan bertingkat yang menggunakan metode BIM, dengan sampel diambil dari beberapa proyek yang relevan. Teknik pengumpulan data dilakukan melalui observasi, wawancara, dan analisis dokumen. Data yang diperoleh dianalisis menggunakan metode komparatif untuk membandingkan hasil perhitungan QTO antara metode BIM dan metode konvensional. Hasil analisis menunjukkan bahwa penerapan BIM dalam proses perhitungan QTO memberikan keunggulan substansial dalam hal akurasi dan efisiensi. Terjadi selisih hasil perhitungan QTO antara metode BIM dan metode konvensional, di mana item volume beton menunjukkan selisih terbesar sebesar 7,24% pada beton pelat lantai 2, dan volume pembesian memiliki selisih terbesar sebesar 9,87% pada pembesian pelat lantai 3. Penerapan BIM dalam perhitungan QTO meningkatkan efisiensi dan akurasi estimasi biaya, serta mengoptimalkan alokasi sumber daya dan mengurangi potensi kesalahan perhitungan. Hasil penelitian ini memberikan implikasi penting bagi industri jasa konstruksi, terutama dalam meningkatkan kualitas perencanaan dan pelaksanaan proyek konstruksi melalui teknologi BIM.
Evaluasi Karakteristik Kinerja Jalur Pedestrian Di Kawasan Perkotaan (Studi Kasus Pada Jalan Keramat Raya Jakarta Pusat) Rialdi Hikmahtiar; Alizar Alizar
Cerdika: Jurnal Ilmiah Indonesia Vol. 5 No. 3 (2025): Cerdika: Jurnal Ilmiah Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/cerdika.v5i3.2534

Abstract

Jalur pedestrian merupakan elemen penting dalam infrastruktur perkotaan yang mendukung mobilitas pejalan kaki. Penelitian ini bertujuan untuk mengevaluasi karakteristik kinerja jalur pedestrian di kawasan perkotaan berdasarkan aspek siskulasi, aksesbilitas, keamanan, kebersihan, dan kenyamanan. Penelitian ini menggunakan metode deskriptif dengan pendekatan kualitatif. Keberadaan pedestrian di Jalan Keramat Raya Jakarta Pusat sering kali disalahgunakan oleh masyarakat untuk kegiatan perdagangan dan lahan parkir. Penelitian ini data dikumpulkan melalui observasi lapangan, wawancara dan kuesioner. Berdasarkan hasil penelitian yang telah dilakukan pada jalur pedestrian di Jalan Keramat Raya Jakarta Pusat pada segmen 1 mendapatkan nilai 70% dan pada segmen 2 mendapatkan nilai 67%. Meskipun sudah tergolong nyaman/puas dalam fasilitas pedestrian, persentase tersebut terlalu sedikit pada klasifikasi kepuasan pengguna karena untuk dapat dikatakan nyaman/sangat puas persentase berkisar antara 80-100%. Hal yang menyebabkan tingkat kenyamanan pejalan kaki yang turun saat malam hari adalah keberadaan PKL. Keberadaan PKL pada jalur pedestrian membuat kenyamanan jalur pedestrian menurun. Direkomendasikan penataan kembali tempat pedagang kaki lima yang ada di area pedestrian dan pemeliharaan jalur pedestrian agar dapat meningkatkan kenyamanan dan keselamatan pengguna.
Analisis Daya Dukung Pondasi Tiang Bored Pile Pada Proyek Morrissey Ayie Maulana Ikhsan; Alizar
Cerdika: Jurnal Ilmiah Indonesia Vol. 5 No. 6 (2025): Cerdika: Jurnal Ilmiah Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/cerdika.v5i6.2571

Abstract

The foundation is the lowest structural component of a building. All the load of the building is supported by the foundation. transferring the load to the soil below. Shallow foundations and deep foundations are two categories of foundations. The Morrissey hotel project uses bored pile foundation, as bored pile foundation is used for buildings in densely populated areas. Bored pile foundation is done by using a drilling machine to drill a hole of a certain depth, then filled with cast concrete and iron bones. This technique is considered to produce a foundation with good durability, especially over a long period of time. Various techniques in bored pile calculation, including conus penetration test (CPT), standard penetration test (SPT), and assessment based on soil shear strength characteristics such as cohesion (c), inner shear angle (?), and soil content weight (?), can be used to determine the bearing capacity of bored piles. The tip bearing capacity (Qb) and the blanket friction bearing capacity (????????), which are determined using the formula, are the two main parts of the bored pile axial bearing capacity.
Analisis Kapasitas dan Tingkat Pelayanan Simpang Tak Bersinyal dengan Metode PKJI 2023 (Studi Kasus: Jalan Raya Cileungsi Jonggol Dan Jalan Raya Permata Cibubur) Yudhi Setyarahman; Alizar Alizar
Cerdika: Jurnal Ilmiah Indonesia Vol. 5 No. 5 (2025): Cerdika: Jurnal Ilmiah Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/cerdika.v5i5.2622

Abstract

Kemacetan lalu lintas yang terjadi di simpang tak bersinyal pada Jalan Raya Cileungsi Jonggol dan Jalan Raya Permata Cibubur menjadi permasalahan utama akibat tingginya volume kendaraan pada jam sibuk. Penelitian ini bertujuan untuk menganalisis kinerja simpang dengan menggunakan metode PKJI 2023 serta mengevaluasi dampak dari solusi rekayasa lalu lintas terhadap peningkatan efisiensi. Data dikumpulkan melalui survei lapangan selama tujuh hari dengan observasi pagi dan sore hari. Parameter yang dianalisis meliputi volume lalu lintas, kondisi geometrik, derajat kejenuhan, tundaan, dan peluang antrian. Sebelum perbaikan, simpang menunjukkan derajat kejenuhan sebesar 0,82 dan tundaan rata-rata 15,69 detik per SMP, diklasifikasikan dalam Tingkat Pelayanan C. Solusi yang diterapkan berupa penghapusan jalur belok kanan terbukti meningkatkan kapasitas simpang menjadi 4.977,8 SMP/jam dan menurunkan DJ menjadi 0,47 dengan tundaan berkurang menjadi 9,71 detik per SMP, meningkatkan Tingkat Pelayanan menjadi B. Temuan ini menunjukkan bahwa solusi non-infrastruktur berbasis manajemen arus lalu lintas dapat memberikan dampak signifikan terhadap kinerja simpang. Penelitian ini memberikan kontribusi penting dalam pengembangan strategi pengelolaan simpang tak bersinyal di wilayah dengan kepadatan lalu lintas tinggi, dan dapat menjadi rujukan bagi kebijakan transportasi daerah yang efisien, ekonomis, dan berkelanjutan.
Analisis Penyelidikan Tanah Pada Proyek Pembangunan Service Center Rawa Buaya, Jakarta Barat Rendi Agustiawan; Alizar Alizar
Cerdika: Jurnal Ilmiah Indonesia Vol. 5 No. 6 (2025): Cerdika: Jurnal Ilmiah Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/cerdika.v5i6.2696

Abstract

Soil investigation is an important step in construction planning to determine soil characteristics and bearing capacity. This study aims to analyze soil conditions at the Rawa Buaya Service Center Building Development Project site, West Jakarta. The study uses soil data based on the results of the Cone Penetration Test (CPT), and Standard Penetration Test (SPT). The data obtained are used to evaluate the soil profile, soil bearing capacity, and other geotechnical parameters relevant to the needs of the foundation design. The methodology used involves collecting primary data through field testing and taking soil samples for laboratory analysis. In addition, secondary data from previous geotechnical reports and geological maps are also used to support the results of the analysis. The results of the study indicate that the soil at the study site consists of layers of clay, silt, and sand with varying bearing capacity values depending on the depth. Based on the study, the results of the comparison of the bearing capacity values of the pile foundation permit for CPT data with a depth of 6m obtained from the Sondir1 (S1) point with the Bagemann method of 52.09 tons, and the Wesley method of 43.68 tons. For Sondir2 (S2) point, the Bagemann method is 54.5 tons, and the Wesley method is 51.95 tons. For Sondir3 (S3) point, the Bagemann method is 61.95 tons, and the Wesley method is 58.2 tons. The bearing capacity value of the pile foundation permit for SPT with the Meyerhof method is 66.98 tons.
An Analysis of User Satisfaction with TransJakarta Bus Stop Infrastructure Quality in East Jakarta Mohamad Kamyah; Alizar Alizar
Jurnal Teknik dan Science Vol. 4 No. 2 (2025): Juni : Jurnal Teknik dan Science
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/jts.v4i2.2298

Abstract

This study aims to analyze the extent to which the quality of bus stop infrastructure influences the satisfaction level of Transjakarta users. The research focuses on three key aspects: comfort, accessibility, and safety of the bus stops, which are considered essential elements in shaping public transportation user experience. Data collection was conducted at several bus stops representing various infrastructure conditions across the Jakarta area. A total of 160 respondents, all regular users of Transjakarta, participated in the study. The data analysis seeks to identify the degree of influence each variable has on overall user satisfaction
Evaluation of Wastewater Pipeline Network Discharge in the Area of Patimura Street to Prapanca Raya Street, South Jakarta Ali Bahroni; Alizar Alizar
International Journal Multidisciplinary Science Vol. 5 No. 1 (2026): February: International Journal Multidisciplinary Science
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/ijml.v5i1.2683

Abstract

This study evaluates and plans a wastewater pipeline network to support sustainable urban wastewater management in the Pattimura Street–Prapanca Raya area. The analysis uses a gravity-flow hydraulic approach that considers domestic wastewater discharge, infiltration, peak factors, and pipe filling conditions. The results indicate that the maximum design discharge of 0.7296 m³/s can be accommodated by the planned pipeline network. The calculated pipe diameter was adjusted to a standard size of 250 mm to ensure sufficient capacity and safe operation. Flow velocities meet technical requirements, preventing sedimentation and pipe damage. An 80% pipe filling ratio provides reserve capacity for future flow increases, while the design discharge remains within the capacity of the existing wastewater treatment plant. Therefore, the proposed wastewater pipeline network is optimally designed and suitable as a connection point for future network development
Sosialisasi Pengenalan Uji Sondir untuk Evaluasi Daya Dukung Tanah Bangunan Masjid Jami’ Raudhatul Jannah, Wilayah Jakarta Timur Era Agita Kabdiyono; Alizar Alizar; Muslim Untung; Nabiyanka Ardhiansyah; Wulan Muchidayat
 Jurnal Abdi Masyarakat Multidisiplin Vol. 5 No. 01 (2026): April: JURNAL ABDI MASYARAKAT MULTIDISIPLIN
Publisher : Asosiasi Dosen Muda Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56127/jammu.v5i01.2749

Abstract

This community service activity aimed to introduce and implement Cone Penetration Testing (CPT) or sondir testing as an initial method for evaluating soil bearing capacity in the construction plan of Masjid Jami’ Raudhatul Jannah, located in East Jakarta. Soil investigation plays a crucial role in ensuring the structural safety and stability of buildings, particularly for public facilities such as mosques. The program was conducted through field observations, technical explanations, and direct demonstrations of CPT procedures to mosque administrators and local community representatives. The test results provided information regarding soil stratification, cone resistance, and estimated bearing capacity at the proposed construction site. The activity also enhanced participants’ understanding of the importance of geotechnical investigations prior to construction work. Through this program, the community gained practical knowledge about soil testing methods and their contribution to minimizing structural risks and supporting sustainable building development. The implementation of CPT testing is expected to become a reference for future construction planning in the area.
Co-Authors Ali Bahroni Ayie Maulana Ikhsan Era Agita Kabdiyono Heri Permana Mohamad Kamyah Muslim Untung Nabiyanka Ardhiansyah Rachmat Mudiyono Rendi Agustiawan Rialdi Hikmahtiar Rifaldi Adi Saputra Slamet Imam Wahyudi Wulan Muchidayat Yudhi Setyarahman