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Jurnal IPTEK
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : 14117010     EISSN : 2477507X     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal IPTEK - Media Komunikasi Teknologi Diterbitkan secara berkala setahun 2 (dua) kali pada bulan Mei dan Desember oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM), Institut Teknologi Adhi Tama Surabaya (ITATS). Jurnal ini memuat hal-hal yang berkaitan dengan bidang Teknik Sipil, Teknik Mesin, Teknik Elektro, Teknik Arsitektur, Teknik Perkapalan, Teknik Informatika, Teknik Industri, Teknik Kimia, Teknik Lingkungan, Teknik Pertambangan, Teknik Geologi, Desain Produk, Sistem Informasi, dan Sistem Komputer baik yang ditulis dalam bahasa Indonesia maupun bahasa Inggris (diutamakan).
Arjuna Subject : -
Articles 10 Documents
 1 
Search results for , issue "Vol 28, No 1 (2024)" : 10 Documents clear
Alternative coarse agregate using locally available materials in Bangkalan Pertiwi, Dewi; Agusdini, Theresia Maria; Farchan, Muchamad
Jurnal IPTEK Vol 28, No 1 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5350

Abstract

Madura Island possesses significant natural resources, particularly aggregates from class C excavations in Bangkalan Regency. These aggregates, including fine aggregate (sand) and coarse aggregate (gravel), are potential materials for concrete mixtures. However, concrete produced solely with Bangkalan aggregates typically achieves a compressive strength of 14 MPa. Combining these aggregates with those from Java Island can enhance compressive strength to 20 MPa. This study aims to determine the optimal composition of Bangkalan and Pandaan coarse aggregates, using admixtures type D (0.3%) and type F (0.6%), to achieve a target compressive strength of 35 MPa. Various combinations of coarse aggregates (100% Bangkalan, 90% Bangkalan and 10% Pandaan, 80% Bangkalan and 20% Pandaan, and 70% Bangkalan and 30% Pandaan) were tested using cylindrical specimens (15 x 30 cm). The results indicate that the combination of 90% Bangkalan and 10% Pandaan aggregates, with the specified admixtures, produced the highest compressive strength of 31.06 MPa at 28 days, which did not meet the target of 35 MPa. This suggests further research is needed to explore additional aggregate combinations and admixture variations to achieve the desired compressive strength.
Standard Operation Procedure for The Laundry Industry by Considering Thaharah from Uncleanness Muti, Asri Amalia; Yuniawati, Ratna Diah; Mustaqim, Mustaqim
Jurnal IPTEK Vol 28, No 1 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5052

Abstract

In general, the clothing sorting stage is to only separate clothes based on type, color, material and function. Unclean and hadas are not included in the sorting priority. Guaranteeing the quality of products or services is also very clearly stated in article 7 point d of Law no. 8 of 1999 concerning the obligations of business actors to guarantee the quality of goods and/or services produced. In order to prevent fraud by laundry business actors who do not comply with the quality, level, composition, especially the processing process, style or mode as stated on the label or description of goods and/or services, it is necessary to formulate SOPs as a guideline for running a business. The aim of this research is the need for industrial laundry SOPs that consider thaharah, in order to provide confidence and guarantee the quality of service results and raise awareness of consumer protection so that honesty and responsibility can grow. This research has a qualitative approach and validates the SOP document. From the preparation of the SOP, it was recorded that there were 30 activities with a total time of approximately 23,400 seconds or 6.5 hours, the time required was longer than before. Apart from that, there are changes in the sorting process, namely the unclean classification in the first inspection and the color classification in the second classification. The validation result is that the SOP that has been created is in accordance with the thaharah principle. Furthermore, this research can measure work productivity with the aim of increasing efficiency and effectiveness in work processes and time.
Proposed Auto Feeder Conveyor Project Scheduling Using the Critical Path Method at PT XYZ Hakim, Luqman; Saputra, Jefri
Jurnal IPTEK Vol 28, No 1 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5409

Abstract

Scheduling is important and must be done in every project implementation. PT XYZ is a company engaged in the production of industrial machine fabrication. One of the jobs PT XYZ obtained was making auto feeder conveyors. In its scheduling plan, PT XYZ estimates that the work will be completed within 37 days. However, in practice, the work was completed within 42 days. There was a delay of 5 days. This delay will cause losses in costs and also cause consumer dissatisfaction. To resolve this delay, the critical path method (CPM) is used. After using the CPM method, the auto feeder conveyor manufacturing project can be completed within 39 days. The critical path of the project lies in work B – E – F – G – H – I – J.
Slope Geometry Design Optimization in the Final Wall Pit Area of Sijebi PT. Solusi Bangun Indonesia Tbk, Narogong Factory, Bogor Regency Afwach, Atina -; Najib, Najib -; Santi, Narulita
Jurnal IPTEK Vol 28, No 1 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5136

Abstract

Slope design is an important component that must be considered in open-pit mining. It affects mine safety as well as the maximization of mining activities. These two things have an inversely proportional relationship and must be optimized with each other. This research aims to provide optimal recommendations related to geometry design that considers the stability of slope mining. The methods utilized in this research are Rock Mass Rating (RMR), Geological Strength Index (GSI), Slope Mass Rating (SMR), kinematics analysis, and limit equilibrium method. Based on the investigation that has been carried out, it is known that the value of the safety factor on the research slope is 4.192 for natural conditions and 3.967 for water-saturated slopes. The slope's safety value factor is known to be a very safe condition. Maximizing the mine design is crucial to achieving optimal extraction of mining materials. The most appropriate slope geometry design for the specified research area requires a single slope angle of 80°, a height of 10 m, and a width of 3 m, resulting in an overall slope of 68°. According to the findings of this recommendation, the safety factor value obtained is 2.076 for natural conditions and 2.050 under water-saturated conditions.
Food Security Mapping in Padang City Using Geographical Information Systems (Case Study: Beef) Oktavia, Nurike; Helmi, Adlina Safitri; Ahmad, Nofan Hadi; Ramadhani, Indah Kurnia; Triha, Hadigufri
Jurnal IPTEK Vol 28, No 1 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5499

Abstract

In Indonesia, the cattle agricultural business is one of the most significant food commodities for comply nutritional needs. The variable availability of cattle supplies is a challenge that the Padang City Agriculture Service must tackle. As a result, to establish the state of food security in Padang City, food security indicators must be calculated and analyzed. Food Security Quotient (FSQ) approach was used in this study to map the logistical network and beef food security. Following that, an information system based on a Geographic Information System (GIS) was created to represent the flow of the beef supply chain in Padang City. It was discovered from direct observations beef supply chain network in Padang City comprises of a fresh beef and a frozen beef supply chain. Beef suppliers from other regions, local breeders, feed lotters, slaughterhouses, wholesalers, retail traders, hotel / supermarket /restaurant/ catering consumers, rendang processing industry consumers (MSMEs), home consumers small-scale dining, and household consumers are all involved in the fresh beef supply chain. The analysis of the level of food security in Padang City revealed that three sub-districts were in the secure state, three were in a moderate state, and five were in a vulnerable state. The developed GIS is supposed to aid decision making in Padang City on food security predictions.
Influence of Polymer Superplasticizers Usage on Workability and Compressive Strength of 30 MPa and 40 MPa Concrete Iranata, Data; Suswanto, Budi; Septiarsilia, Yanisfa
Jurnal IPTEK Vol 28, No 1 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5283

Abstract

The advancement of technology has provided various alternatives to address limitations in concrete construction. One effective method for enhancing the quality of concrete is by introducing additional materials, known as admixtures, during the concrete production phase. One such type of admixture that can significantly improve concrete quality is superplasticizer. The primary principle behind the use of superplasticizer is to create a repelling force between cement particles to prevent clumping, which can lead to the formation of air voids in the concrete. This, in turn, can reduce the strength or quality of the concrete. In this research, the focus will be on the use of concrete admixtures, specifically superplasticizer, to enhance concrete workability. One product of superplasticizer is Sika Viscocrete 3115 N, which will be used in this study. Superplasticizers like Sika Viscocrete 3115 N play a crucial role in improving the flow and workability of concrete mixes, making them easier to handle and place during construction. This leads to more efficient and high-quality concrete structures. The target compressive strengths are 30 MPa and 40 MPa with variations in the percentage of superplasticizer admixture usage at 0%, 0.25%, 0.5%, and 0.75%. The testing methods used to determine the workability value are the slump test and the slump flow test, while the compressive strength test is conducted using a compression testing machine at the Advanced Concrete Materials and Computational Mechanics Laboratory, Department of Civil Engineering, ITS. The study concludes that the addition of superplasticizer can enhance the workability of concrete but cannot optimally increase compressive strength. Additionally, different planned compressive strengths with the same percentage variation exhibit different trends. The addition of 0.25%-0.5% superplasticizer in both planned strengths still yields compressive strength above the planned levels, despite the decrease.
Utilization of Low-Grade Ceiba Pentandra Oil for Biodiesel Production Using Nano Zinc Oxide Catalyst Supported by Fly-Ash Waste Somawiharja, Yohannes -; Siswoyo, Deddy Kurniawan Putra; Asri, Nyoman Puspa
Jurnal IPTEK Vol 28, No 1 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5937

Abstract

Biodiesel is a renewable energy and potentially to be developed to replace fuel derived from fossil oil. This study explores the oil of Ceiba pentandra (OCP), a low-quality oil with high free fatty acids as a feedstock for biodiesel production.  A cost-effective nano-doped zinc oxide heterogeneous catalyst was developed using fly ash waste as a support called NZO/FA. The catalyst was synthesized using co-precipitation, precipitation, and impregnation methods. Biodiesel is made through a transesterification process using a laboratory-scale glass-type batch reactor. The experiment examines how the varied temperature (60-80°C with an interval of 10°C) and varied reaction time (3-5 hours with an interval of 0.5 h) influence biodiesel yield, heating value, and final product properties. Meanwhile, other conditions were fixed at a molar ratio of oil/methanol of 1:15 and a catalyst dosage of 5%. The results showed the highest yield of 98.69%, and a GHV of 37.95 MJ/kg was obtained at a reaction temperature of 80°C and a reaction time of 5 hours. Meanwhile, almost all of the characteristics of the biodiesel produced meet SNI 7182:2015.
Identification of Structural Damage in Frame Bridge Using Mode Shape Curvature: Simulation on Laboratory-Scale Frame Bridge Irawan, Djoko; Suswanto, Budi; Habieb, Ahmad Basshofi; Fitriyah, Dita Kamarul
Jurnal IPTEK Vol 28, No 1 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5291

Abstract

Most bridge construction is dominated by steel bridges with various designs and structural types. The choice of steel as a material is due to its known strength, durability, and resistance to damage. However, if maintenance activities on steel bridges are lacking, there is a potential for damage or even failure of the structure. Structural failure can result in economic losses for the country, and more importantly, it can pose a threat to human safety. Therefore, there is a need for monitoring activities to assess the structural health. The development of monitoring activities in the last decade includes the Structural Health Monitoring System (SHMS). To address the challenges of SHMS, various methods are being researched. Non-Destructive Testing (NDT) methods are considered the best choice as an inspection tool, being perceived as easy, and effective in detecting and diagnosing various structural issues. Hence, in research, the detection of damage locations in steel bridge structures is carried out using the Mode Shape Curvature (MSC) method with the assistance of an accelerometer sensor. The MSC method contributes to SHM at level II, specifically in detecting the location of damage in the structure. It is observed that in the designed damage scenarios, the MSC index indicates a loss of stiffness with an increase in the MSC value at the damage location.
(Cover, Editorial Board, Table of Contents) IPTEK, Tim Jurnal
Jurnal IPTEK Vol 28, No 1 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.6027

Abstract

Rice Bran Oil Extraction: A valuable First Step Towards Edible Oil Naulina, Rosada Yulianti; Novitasari, Diana; Irmawati, Devi; Zullaikah, Siti
Jurnal IPTEK Vol 28, No 1 (2024)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5047

Abstract

Rice bran has the potential to become a nutritional component that reduces disease risk and improves physical health. In addition, rice bran is a hypoallergenic (allergen-free) component which is a good source of dietary fiber. Rice bran oil extraction (RBO) is one of the most popular uses of rice bran. Judging from the health benefits and healthier composition, rice bran oil is very appropriate. The most unsaturated fatty acids are found in rice bran oil which has a composition of 80% unsaturated fatty acids. In taking yields, the extraction method is a practical and effective technique. This research aims to understand the effect of temperature, mesh size, and extraction time on the yield value and FFA RBO content. This Soxhlet uses several variables, with temperature variables of 60°C, 65°C, 70°C, 75°C, 80°C while time variables of 1, 2, 3, 4, and 5 hours with variations in mesh size of 100 and 60. The research results show that soxhletation extraction at mesh 100 optimum increases at a temperature of 70°C within 4 hours. Where the yield of oil produced was 11.62%. Meanwhile, for mesh 60, the optimum increase occurred at a temperature of 65°C within 4 hours with an oil yield of 12.90%. Rice bran oil extraction, the content of in rice bran oil extraction, the content of alkenes, aldehydes, and alkene bending.

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