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All Journal PengabdianMu: Jurnal Ilmiah Pengabdian kepada Masyarakat International Journal of Research in Vocational Studies (IJRVOCAS) Retensi
ikhwan Arief Purnama
Politeknik Negeri Pontianak
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Journal : Retensi

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Pemanfaatan Limbah Bauksit (Tailing Bauxite) Sebagai Bahan Pengganti Agregat Halus Terhadap Kuat Tekan, Kuat Tarik Belah, dan Modulus Elastisitas Pada Beton Rabihati, Etty; Purnama, Ikhwan Arief; Adjie, Muhammad Syafri; Rachmawan, Valdi Dwi
RETENSI Vol. 1 No. 1 (2020): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v1i1.232

Abstract

Until now, bauxite waste (bauxite tailings) has not been utilized in its entirety, causing an increase in the amount of waste in the bauxite producing areas. The percentage between the bauxite produced and the amount of waste produced is 50%: 50%. This research was conducted to see whether or not the use of liquid waste (tailings bauxite) is appropriate as a place for fine aggregate in the manufacture of concrete. This study used an experimental method with the replacement of the concrete mixture, namely sand with bauxite waste (bauxite tailings) with the proportion of bauxite waste (bauxite tailings) of 2.5%, 5%, and 7.5%. The tests carried out were compressive strength testing, split tensile strength testing, and modulus of elasticity. The results of the test for the highest compressive strength average age of 7 days were found in normal concrete with an average compressive strength of 21.58 MPa. The average compressive strength of 28 days was 7.5% bauxite waste concrete with an average compressive strength of 32.07 MPa. The tensile strength of 7 days was in bauxite waste concrete at 7.5% with a split tensile strength of 2.90 Mpa. The tensile strength of 28 days was in bauxite waste concrete 7.5% with a split tensile strength of 3.26 Mpa. The highest average modulus of elasticity is found in 7.5% bauxite waste concrete with a yield of 26607.03 Mpa, Keywords: Bauxite Waste (Tailing Bauxite), Compressive Strength, Modulus of Elasticity, Split Tensile Strength
KARAKTERISASI SIFAT FISIK DAN MEKANIK TANAH TIMBUNAN BABALESI YANG BERDASAR DARI LIMBAH BAUKSIT DAN BAKTERI PROBIOTIK: KARAKTERISASI SIFAT FISIK DAN MEKANIK TANAH TIMBUNAN BABALESI YANG BERDASAR DARI LIMBAH BAUKSIT DAN BAKTERI PROBIOTIK marini, lelly; Hariyani, susi; Purnama, Ikhwan Arief
RETENSI Vol. 2 No. 1 (2021): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v2i1.405

Abstract

Bauxite waste in the form of red mud is known as waste could pollute water and soil in theenvironment around the mining area and endanger public health if not given advance prevention. Bythe increasing amount of waste and the growing amount of bauxite production, this problem becomeimportant issue for the mining sector, the government and the surrounding public directly affected.Utilization on a large scale and environmentally friendly are the points in this bauxite waste solution.The Babalesi landfill for road construction is a consideration in utilizing bauxite waste by usingprobiotic bacteria as a modifier. The feasibility and potential testing of Babalesi soil is carried out byphysical and mechanical tests of the soil based on ASTM Standards. These tests produce parametersthat refer to the AASHTO and USCS Classifications to determine the requirements for embankment2soil. For the physical test in the initial test of the red mud condition, the parameters indicated the A-7-6 classification, namely clay with poor quality. Furthermore, the physical test on Babalesi soilshowed A-4 classification, namely silt soil with medium quality. Meanwhile, the mechanical test forboth conditions, namely the original red mud condition and the Babalesi soil condition, could not becarried out because even in dry conditions, Babalesi soil proved to be very hard, but if it was inwatery conditions as a procedure in the mechanical test, it could not be formed and the mechanicalparameters could not be measured. The results of the physical test concluded that Babalesi landfillmeet the requirements and could be recommended as a road construction embankment. Themanufacture of Babalesi soil could be carried out directly in the waste pond by layered way usingheavy equipment as a stirrer of bacterial solution and bauxite waste.
Tinjauan Waktu Dan Biaya Menggunakan Metode Crashing Dengan Sistem Shift Tenaga Kerja: Tinjauan Waktu Dan Biaya Menggunakan Metode Crashing Dengan Sistem Shift Tenaga Kerja Maulidyah, Maulidyah; rizkiyah, sri; Arena, Azza; Purnama, Ikhwan Arief
RETENSI Vol. 3 No. 1 (2022): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v3i1.502

Abstract

Pada saat membangun proyek gedung, keterlambatan pekerjaan proyek sering terjadi saat dilaksanakan. Jadi dibutuhkan alternatif yang dapat membantu menyelesaikan proyek konstruksi lebih cepat salah satunya dengan menggunakan metode shift tenaga kerja. Penelitian ini menganalisis percepatan periode menggunakan shift tenaga kerja pada proyek konstruksi gedung SMAN 4 Kota Pontianak Kalimantan Barat. Total anggaran biaya proyek pada kondisi pasca-crashing dengan sistem shift tenga kerja dengan total biaya Rp2.731.667.460,24 lebih tinggi dari total anggaran proyek dalam kondisi normal yaitu Rp. 2.222.022.510,48, dan periode pelaksanaan proyek 77 hari lebih cepat dari periode normal dari 180 hari pada durasi normal Dapat disimpulkan bahwa penerapan sistem shift lebih efektif dalam durasi karena lebih cepat dari rencana durasi normal. Menjadi efektif dan efisien dalam proyek konstruksi sangat penting karena ada banyak mekanisme kerja yang saling mempengaruhi seperti biaya, waktu, sumber daya manusia, sistem manajemen kesehatan dan keselamatan kerja (SMK3) untuk identifikasi resiko yang kemungkinan terjadi dalam proyek konstruksi, dan manajemen komunikasi proyek sangat penting dalam konstruksi.
DESIGN OF 5 STORIES REINFORCED CONCRETE STRUCTURE DATA CENTER BUILDING IN SOUTH PONTIANAK SUB-DISTRIC: PERANCANGAN STRUKTUR BETON BERTULANG 5 LANTAI PADA BANGUNAN GEDUNG DATA CENTER DI KECAMATAN PONTIANAK SELATAN Kurniawan, Farhan; Purnama, Ikhwan Arief; GINTING, RAFANI; Irpan, Muhammad
RETENSI Vol. 3 No. 2 (2023): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v3i2.605

Abstract

The demand for supporting facilities in the advancement of information technology, specifically in Pontianak City, is increasing, a building that is suitable, strong, and earthquake resistant is needed as an effort to support the sustainability of centralized information technology infrastructure. The design of the data center also used a hebel brick as a wall to reduce the dead load of the building. The entire structure uses reinforced concrete structures in soft soil conditions (SE) with a intermediate moment frame system (IMF) that refers to SNI 2847-2019, also takes into the calculation of seismic aspects according to SNI 1726-2019 with the spectrum response method. The serviceability of this building is estimated according to the service load of office buildings and computer rooms based on SNI 1727-2020. This 5-storey building is modeled and structural analysis using the SAP2000 program, as well to 2D detail engineering design using the AutoCAD 2020 program, has a site area of 980 m². The strength of the foundation structure is based on Cone Penetration Test on Purnama street. All structural components use concrete strength fc' 30 MPa and steel strength 400 MPa. The design results thick deck plate 150 mm and floor/stair/step plate 120 mm, prymary beam and sloof B1 with dimensions 300×600 mm, secondary beam B2 with dimensions 250×500mm, secondary beam B3 with dimensions 150×300mm, primary column K1 with dimensions 600×600 mm, column K2 with dimensions 350×350mm, fondation pilecap P1 with dimensions 3100×3100×700mm, fondation pilecap P2 with dimensions 5100×1800×700mm, fondation pilecap P3 with dimensions 700×700×500mm with bearing capacity of square pile dimensions 350×350mm with length of 24m. Keywords: Building, Data center, Structure, Reinforced concrete, IMF
PERANCANGAN MANAJEMEN STRUKTUR PADA BANGUNAN GEDUNG 5 LANTAI SEKOLAH SD/SMP KRISTEN IMMANUEL KABUPATEN KUBU RAYA Syahwalitya Fahdila, Sucy; Eka Pratami, safitri; Syafriadi, syafriadi; Purnama, Ikhwan Arief
RETENSI Vol. 4 No. 2 (2024): Retensi
Publisher : Jurusan Teknik Sipil Polnep

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31573/retensi.v4i1.765

Abstract

Improving school building facilities and infrastructure is very necessary because of the rapid development in the world of education. Building planning is very influential because it will produce a building that meets the requirements of being sturdy, economical and aesthetic in order to avoid damage to the building. Construction management is a very appropriate solution for planning the needs of cost, quality, time, and human resources as well as Occupational Safety and Health (K3). In planning the management of the Immanuel Elementary/Junior High School Building, Kubu Raya Regency, an analysis of the working drawings used as the object of management planning is carried out first. So that a job description is obtained from the work drawing to analyze cost management, quality management, time management by making a Network Planning using the Critical Path Method (CPM), human resource management, and occupational health safety management. In this write, the author uses data sources in the form of primary data and secondary data. Primary data is in the form of working drawings and field documentation, while secondary data is in the form of 2020 Unit Price Analysis (AHS), work plans and requirements (RKS), laws/government regulations, and literature. Based on the processed data, the final results include the Draft Budget (RAB) of Rp. 13,751,000,000 , the duration of the work is 228 days, project quality management is made an analysis of the quantity of work in which there are specifications for each job in detail and in accordance with existing guidelines and in accordance with standards, Human Resources (HR) results in the highest number of workers a lot for reinforcement work as many as 88 people and at least on the work of installing bolts and anchors, installing 12mm plates and installing 16mm plates on the roof as many as 2 people. Occupational Health and Safety (K3) is the result of risk control and the need for personal protective equipment that is in accordance with standards and needs.
Co-Authors Adjie, Muhammad Syafri Ahmad Muhtadi Arena, Azza Eka Pratami, safitri GINTING, RAFANI Hafiyyan, Qalbi Hariyani, Susi Irene anggraini Irpan, Muhammad Kurniawan, Farhan lelly marini Maulidyah, Maulidyah Perangin Angin, Imanuel Kemenangenta Rabihati, Etty Rachmawan, Valdi Dwi Randy Setiawan, Randy Rizal Rizal rizkiyah, sri Ryanti, Eva Sasongko, Hartanto Wahyu Syafriadi Syafriadi Syahwalitya Fahdila, Sucy