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PEMODELAN DIMENSI SAMPEL UNTUK MENENTUKAN PARAMETER DESAIN MENGGUNAKAN UJI TRIAKSIAL PADA TANAH LEMPUNG Rabinah, Aiun Hayatu; Pamungkas, Nur Setiaji; Suparman, Suparman; Satriyadi, Lilik; Warsiti, Warsiti; Bulan, Yosua Daniel; Affani, Chelsea Dhiya
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 28 No. 1 (2023): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v28i1.4568

Abstract

Test selection is very influential in determining the design parameters. The aim of this research is to study the dimensions of the triaxial test soil sample on clay soils in the Semarang area to obtain soil shear parameters that can be used as design parameters. The tests include testing the physical and mechanical properties of the soil. Mechanical testing uses a triaxial test. The UU triaxial test sample is modeled with a diameter of 3.5 cm and 3.8 cm, while the CU sample is 3.5 cm. Based on the results of soil property index testing, sieve analysis, and consistency limits, it can be concluded that the soil samples are non-organic clay with high plasticity. Based on the triaxial test UU values of c and Ï… it can be seen that the largest shear parameter occurs in the specimen with a diameter of 3.8 cm. The largest UU triaxial test c value is 0.32 kg/cm2 , meanwhile, for Ï… it has a value of 11.65 º. The specimen with a larger diameter has a greater shear stress value. This can be influenced by larger c and Ï… values. The c and c' values of the triaxial CU test results were 0.32 kg/cm2 and 0.50 kg/cm2 respectively. While the values of Ï… and Ï…' are 9.89 º and 17.35 º respectively. The Ï„ and Ï„' values obtained were 1,394 kg/cm2 and 1,405 kg/cm2 , respectively. The modulus of elasticity of soil is 1500 kN/m2 and 3200 kN/m2 respectively which is included in the type of soft clay soil with a value range of 1800 ”“ 3500 kN/m2 and is included in the CH classification with a range of 0.35”“4 MPa. The value of the elastic modulus taking into account the value of cohesion, plasticity index, and OCR is closer to the prediction of soil elastic modulus values by Das
OPTIMALISASI ENZIM UREASE UNTUK MENINGKATKAN KAPASITAS DUKUNG TANAH LUNAK Suparman, Suparman; Rabinah, Aiun Hayatu; Satriyadi, Lilik; Sudarmono, Sudarmono; Warsiti, Warsiti
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 29 No. 1 (2024): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v29i1.5659

Abstract

The main problems with soft clay soil are high water content, low soil mineral content, and high compressibility, so stabilization materials are needed that can increase the bearing capacity of soft soil. In this research, the urease enzyme was used as a catalyst to increase the bearing capacity of the soil. The material used is organic material, namely soybean powder. The stabilization materials used are urea (CHâ‚„Nâ‚‚O), calcium chloride (CaCl2), and soybean powder (urease enzyme), which will form a lime compound so that it functions as a catalyst for adhesive in stabilizing soft soil. This research aims to improve soft soil by stabilizing it using the SICP (Soybean Induced Calcite Precipitation) method. The variations in urea and CaCl2 concentrations used were 1 mol/L, 2 mol/L, 3 mol/L, 4 mol/L, and 5 mol/L. The soybean extract concentrate used was 30% with a curing time of 7 days. The most optimal test result and what is used is 3 mol/L. This is in line with the SEM and XRD test results. Test specimens were made and cured for 7, 14, 21, and 28 days and then tested for unconfined compressive strength (UCS) to determine the effect of adding calcium carbonat on soil strength. The UCS test shows that the optimum shear strength value of soil cemented with calcium carbonat is produced in a curring period of 14 days is 1.02 kg/cm2. Meanwhile, for a curring period of more than 14 days, the increase in the unconfined compressive strength value is relatively very small. The increase in soil compressive strength after stabilization was 30.77%. The compressive strength value of the soil increases due to the presence of calcium carbonat formed between the soil grains.
PENGENALAN DAN PELATIHAN UJI TANAH DI LAPANGAN UNTUK SISWA BIDANG KEAHLIAN KONSTRUKSI JALAN, IRIGASI, DAN JEMBATAN SMKN 7 SEMARANG Goro, Garup Lambang; Rabinah, Aiun Hayatu; Mahbub, Jamal; Risman, Risman; Warsiti, Warsiti; Mulyono, Tedjo; Ariyanto, Arief Subakti; Nurhadi, Imam; Satriyadi, Lilik
Bangun Rekaprima Vol. 9 No. 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v9i2.5142

Abstract

Salah satu tantangan yang dihadapi mahasiswa yang berasal dari SMKN 7 Semarang adalah suasana pembelajaran dan sistem pembelajaran yang diterapkan PTV. Hal ini disebabkan karena adanya celah antara kurikulum SMK dengan PTV. Siswa SMKN 7 Semarang sudah memiliki pemahaman dasar terkait kompetensi bidang teknik sipil, tetapi ketika memasuki dunia PTV masih mengalami kesulitan dalam beberapa bidang. Oleh karena itu untuk menjembatani dan mengisi celah dari kurikulum SMK ke PTV diperlukan pengenalan dan pelatihan terkait kompetensi bidang teknik sipil, salah satunya adalah kompetensi pengujian tanah di lapangan.Pelatihan yang dilakuakn adalah pelatihan uji sandcone dan DCP. Hasil dari pelatihan siswa SMKN 7 Semarangdapat memahami secara tepat cara pengujian di lapangan menggunakan alat sandcone dan DCP, juga cara analisis data hasil pengujian. Selain itu, kuisioner juga menanyakan terkait kemudahan bimbingan selama pelatihan, hasilnya adalah 91% siswa menyatakan bahwa dosen dan mahasiswa yang mendampingi memberikan bimbingan dan arahan dengan jelas sehingga mudah dipahami oleh siswa.
PENERAPAN SISTEM PEMERIKSAAN DAN PERBAIKAN RETAKAN PADA DINDING DI KELURAHAN PAKINTELAN KECAMATAN GUNUNGPATI KOTA SEMARANG Kusumastuti, Dianita Ratna; Marsudi, Marsudi; Goro, Garup Lambang; Santosa, Stefanus; Supriyo, Supriyo; Rabinah, Aiun Hayatu; Praharseno, Fikri; Abdillah, Rifqi Aulia; Sulaiman, Sriwahyuningsih
Bangun Rekaprima Vol. 10 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v10i1.5635

Abstract

Community service in the form of implementing a system for checking and repairing cracks in walls in Pakintelan Village, Gunungpati District, Semarang City aims to increase residents' knowledge regarding the problem of cracks in walls which are thought to be caused by ground movement. This activity starts from a site survey, equipment preparation, and training carried out with the correct procedures, ensuring the implementation of correct repair methods and according to standards. Based on the results of surveys and interviews with local residents, the cracks in the walls of houses that occurred at the Citra Pesona Pakintelan Housing Complex were caused by ground movements which caused non-uniform structural settlement and vibrations resulting from housing construction behind the service location. The service team and students provide guidance and assistance to stone masons and the surrounding community. There were 6 masons who took part in the training and several members of the local community. The repair method used to repair cracked walls is the stitching method.
PENERAPAN UJI TANAH DI LAPANGAN UNTUK SISWA SMKN 5 SURAKARTA PROGRAM KEAHLIAN TEKNIK KONSTRUKSI DAN PERUMAHAN Rabinah, Aiun Hayatu; Goro, Garup Lambang; Harprastanti, Primasiwi; Mahbub, Jamal; Risman, Risman; Warsiti, Warsiti; Mulyono, Tedjo; Wiyana, Yustinus Eka; Nurhadi, Imam; Satriyadi, Lilik
Bangun Rekaprima Vol. 10 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v10i1.5494

Abstract

SMKN 5 Surakarta students encountered a challenge during the initial assessment of the civil construction implementation, particularly concerning field soil testing. This challenge was exacerbated by the absence of soil mechanics courses in the curriculum. While the students possessed a fundamental grasp of civil engineering competencies, they faced difficulties in various aspects, with field soil testing being a notable area of concern. To address these competency gaps and enhance the vocational school curriculum, training sessions were conducted to educate students on the practical application of soil tests in the field. The specific training covered sand cone and DCP tests. According to the questionnaire results, post-training, over 50% of SMKN 5 Surakarta students exhibited a clear understanding of how to perform field tests using DCP, Sand Cone, and Speedy Moisture test equipment, along with the ability to analyze the resulting test data. The effectiveness of direct training and intensive mentoring was evident in facilitating students' comprehension of the provided material. Notably, 90% of the students affirmed that the training was easily comprehensible.
PENGEMBANGAN PROTOTIPE ALAT UJI PERMEABILITAS BETON BERPORI UNTUK MENENTUKAN KOEFISIEN PERMEABILITAS Rabinah, Aiun Hayatu; Jamal Mahbub; Suparman; Lilik Satriyadi; Parhadi; Bimawijaya Laia
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol. 30 No. 1 (2025): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v30i1.6481

Abstract

The increasing growth of infrastructure and building development has led to a reduction in land surface cover. The lack of surface cover significantly impacts the environment, such as causing severe flooding. To address water-related issues, one approach is to manage runoff at its source through Low Impact Development (LID) strategies, such as permeable pavements. One method used to infiltrate water is porous concrete. Key parameters of porous concrete include strength, water-cement ratio, porosity, and permeability coefficient. The permeability coefficient of porous concrete is obtained through permeability testing. Laboratory permeability tests are more commonly used than field-testing. Therefore, it is important to have a dedicated tool for testing the permeability of porous concrete. The first stage involves the development and testing of a prototype, which includes prototype design, material survey, material procurement, equipment preparation, prototype construction, and testing. The prototype development refers to the ACI 522R-10 standard. The results of the prototype testing are analyzed using Darcy’s law to determine the permeability coefficient and analyze the flow characteristics. Based on the research findings, the permeability test prototype for porous concrete can be used as a testing tool for porous concrete permeability both in laboratory and field settings. The prototype exhibits laminar flow, thus allowing Darcy’s law to be applied for evaluating hydraulic conductivity.
PENGARUH VOLUME LALU LINTAS TERHADAP KONDISI FISIK JEMBATAN PROVINSI DI DAERAH ISTIMEWA YOGYAKARTA Abdillah, Rifqi Aulia; Surya Buana, Lalu Yahya; Rabinah, Aiun Hayatu
Bangun Rekaprima Vol. 7 No. 1 (2021): April 2021
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (392.466 KB) | DOI: 10.32497/bangunrekaprima.v7i1.2591

Abstract

Jembatan merupakan sarana transportasi yang sangat penting untuk manusia, kondisi jembatan yang baik dapat meningkatkan perekonomian masyarakat dan kehidupan sosial budaya, maka pemeriksaan jembatan sangat perlu dilakukan untuk mengetahui kondisi jembatan dan dapat memastikan bahwa jembatan aman untuk dilalui kendaraan. Menurut data Statistik Transportasi Darat (2017), perkembangan volume kendaraan bermotor di Daerah Istimewa Yogyakarta (DIY) setiap tahunnya bertambah sekitar 646.455 kendaraan bermotor, hal ini akan mempengaruhi kondisi jembatan karena beban lalu lintas yang melewati jembatan akan bertambah. Maka tujuan dari penelitian ini untuk mengetahui seberapa besar pengaruh volume lalu lintas terhadap kondisi fisik jembatan provinsi di DIY. Penelitian ini menggunakan sampel 10 jembatan provinsi di DIY, data kondisi fisik diambil dari data pemeriksaan pada penetilian sebelumnya, data volume lalu lintas didapatkan dari Dinas Pekerjaan Umum Bina Marga provinsi DIY, kemudian data tersebut dianalisa menggunakan teknik tata jenjang untuk memperolah nilai korelasi antara dua variable tersebut. Hasil penelitian didapatkan nilai korelasi (Rho) sebesar 0,449,dimana nilai tersebut lebih kecil dari pada Rho tabel pada taraf 5% sebesar 0,648 dan pada signifikan 1% sebesar 0,794, maka dapat disimpulkan bahwa volume lalu lintas tidak ada pengaruh yang signifikan atau memiliki pengaruh sebesar 44,9% terhadap kondisi fisik jembatan provinsi di Daerah Istimewa Yoyakarta.
PERMBERDAYAAN BANK SAMPAH BERBASIS DIGITAL DALAM UPAYA MENDUKUNG GREEN ACCOUNTING PADA BANK SAMPAH SEMPULUR ASRI GEDAWANG: PERMBERDAYAAN BANK SAMPAH BERBASIS DIGITAL DALAM UPAYA MENDUKUNG GREEN ACCOUNTING PADA BANK SAMPAH SEMPULUR ASRI GEDAWANG Adhi, Nurseto; Rikawati; Sari, Mella Katrina; Rabinah, Aiun Hayatu
Bangun Rekaprima Vol. 11 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v11i1.6383

Abstract

The establishment of the Sempulur Asri Waste Bank began with the establishment of the Sempulur Asri Waste Bank located in RW 5, Gedawang Village, which was pioneered in 2014. The increase in the number of customers made management overwhelmed the management with the problems experienced, there were three main problems in the form of conventional customer account management, suboptimal marketing of the Sempulur waste bank, and incomplete and conventional production equipment. The solution to the problem of conventional customer account management is to digitize the management of the Sempulur Waste Bank account. Solutions for managers who do not master information technology, training and assistance in digitizing the management of the Sempulur Asri waste bank are absolutely necessary. Solutions for customers who are still unfamiliar with the use of information technology, training and assistance in digitizing for customer accessibility related to mutations. The implementation of empowerment is carried out by creating a system utilizing Google Drive for data and file storage. Then for Google Spreadsheet to recap each customer's account mutations and adding customers. In the implementation, it was later found that it was easy for customers to access the balance. This is because the implementation using email is considered less understandable by the customer. Then checking the account by the customer can use the website. This website is used for free using facilities from google sites
IMPLEMENTASI SISTEM PEMERIKSAAN DAN PERBAIKAN KERUSAKAN PADA DINDING BANGUNAN DI KELURAHAN NGADIRGO KECAMATAN MIJEN KOTA SEMARANG: IMPLEMENTASI SISTEM PEMERIKSAAN DAN PERBAIKAN KERUSAKAN PADA DINDING BANGUNAN DI KELURAHAN NGADIRGO KECAMATAN MIJEN KOTA SEMARANG Kusumastuti, Dianita Ratna; Marsudi; Goro, Garup Lambang; Santosa, Stefanus; Supriyo; Rabinah, Aiun Hayatu; Praharseno, Fikri; Abdillah, Rifqi Aulia; Sulaiman, Sriwahyuningsih
Bangun Rekaprima Vol. 11 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/bangunrekaprima.v11i1.6507

Abstract

Community service in the form of implementing a system for inspecting and repairing damage to building walls in Ngadirgo Village, Mijen District, Semarang City aims to increase the insight and skills of local residents regarding the problem of cracks in building walls that occur due to ground movement. This activity starts from a site survey, preparation of tools and materials, training on the correct procedures, ensuring the implementation of correct repair methods and according to standards. Based on the results of surveys and interviews with local residents, the cracks in the walls of RW 2 Hall, Ngadirgo Village, Mijen District were caused by ground movement activities, resulting in non-uniform settlement of the building structure. The service team and students provide training and assistance to residents and bricklayers in Ngadirgo Village, Mijen District. The repair method used to repair cracked walls is the stitching method
Interpretation of Multi Sensor Measurement Results using Fuzzy Membership Function for Landslide Early Warning System Alimudin, Erna; Sumardiono, Arif; Yusuf, Muhamad; Mukhlisin, Muhammad; Apriantoro, Roni; Rabinah, Aiun Hayatu; Astuti, Hany Windri
JURNAL INFOTEL Vol 17 No 1 (2025): February 2025
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v17i1.1252

Abstract

Central Java has several areas prone to landslides. One of them is in Tembalang District in Semarang City, Central Java Province, Indonesia .Landslides can be caused by very high rainfall and there are no trees to support the soil, resulting in land shifting. Landslaezdide disasters are very dangerous because they cause many casualties. Therefore, there is a need for an early warning system for landslides. The landslide early warning system uses several sensors, namely rainfall sensors. Therefore, there is a need for an early warning system for landslides. The landslide early warning system uses several sensors, namely rainfall sensors, soil moisture sensors and soil movement. The sensor data will be processed using fuzzy logic so that the results can be more accurate. Early warning of landslides has several conditions, namely low risk to very high risk. Based on the results of real-time data collection in the landslide disaster early warning system, the results obtained were that the sensors were working well and communication sending data to the website was running well. Data processing has been carried out and can be processed via a controller with a fuzzy logic logic algorithm. The results obtained were that based on sensor data taken early warning of landslides still had a low risk with a value of 0.5375 and a medium risk with a value of 0.5875. This is due to moderate rainfall and high soil moisture, as well as ground movement ≥ 0.1