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INDONESIA
AGREGAT
Published by Universitas Muhammadiyah Surabaya
ISSN : 25412884     EISSN : 25410318     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Transportation
AGREGAT is a journal of Department of Civil Engineering, University of Muhammadiyah Surabaya. The journal will be published in every May and November yearly. The journal consists of result of research, literature review, and case reports created as realization of Tridharma college.
Arjuna Subject : -
Articles 240 Documents
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PENGARUH JOB SECURITY TERHADAP PERSEPSI KESELAMATAN PADA PEKERJA KONSTRUKSI LAPANGAN DI INDUSTRI MINYAK DAN GAS Bagos, Bagos Armansyah; Fitri Nugraheni
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.21981

Abstract

Construction projects are activities that are prone to work accidents, so work safety management is needed to prevent work accidents. One of the factors that greatly influences the perception of work safety is the job security. The aim of this research is to identify job security factors and safety perceptions and analyze the influence of the relationship between job security and the perception of safety among field workers in the oil and gas industry, especially in the Riau province work area. The respondents were field workers and numbered 106 people. The research methods used are qualitative and quantitative. There were respondents who stated that the implementation of work safety was very high, but several dimensions such as sustainable salary increases were still not good (34.91%) and respondents stated that understanding and implementation of the perception of safety was very high. The results of the linear regression test show that job security has a positive and significant effect on the perception of safety among field construction workers, where job security contributes to the perception of safety by 21.5%. The more workers do not fulfill job security, the less workers will care about the perception of safety which can lead to not creating a good safety climate and increasing work accidents
PENERAPAN KINERJA PROYEK KONSTRUKSI PADA Pembangunan Ruas Jalan dan Jembatan Tawang Ngalang Segmen IV menggunakan earned value concept Kartika, Widya; Buddewi Sukindrawati; Diki Rohman
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.22098

Abstract

Implementation of construction projects to achieve planned goals requires project management. Accurate cost calculations, time calculations, and the quality of materials will influence the success of a construction project. Either method of controlling construction project costs and time is earned value concept method. A case study on the Tawang Ngalang Road and Bridge Segment IV construction project. Research method uses earned value concept method, which the method used to calculate the cost according to the budget and the work that has been completed or carried out. Analysis of project implementation performance in terms of cost and time by calculating the amount of BCWS, BCWP, and ACWP. Analysis of estimated costs and completion time for construction projects calculates CPI to-go and SPI to-go. The variables that will be investigated are Cost Variance (CV), Schedule Variance (SV), Cost Performance Index (CPI), and Schedule Performance Index (SPI). The research results show that overall, construction project is progressing well, with SPI results >1 indicating faster time than planned and CPI results >1 indicating more economical costs than budget. The SPI to-go value is 1.129, meaning the project was completed faster than planned. The CPI to-go value is 1.975, meaning the project implementation costs are lower than the planned budget. Based on the results of the evaluation and analysis of project implementation data with a positive deviation or 2.23% faster than the planned schedule
Analisis Pushover terhadap Struktur Gedung dengan Sistem Rangka Pemikul Momen Khusus menggunakan Metode Precast septiarsilia, Yanisfa; Propika, Jaka; Susanti, Eka; Prasetyo, Agus Edy
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.22101

Abstract

The ITS Tower 2 building was built on Keputih Street, Surabaya. This building has 13 floors with a height of +51.00 meters which was built using a conventional concrete system. Based on the structural analysis results, the authors found that the existing structure was included in the category of soft soil (SE). In SNI 2847-2019 for the Special Structural Wall Systems category, the building height had a maximum limit of 48 meters. Conventional system planning took a relatively long time to complete. So it was necessary to evaluate the existing structure and modify it using the SMRF method and Precast System. The SMRF-method was used because it did not have a height limit in its planning, and the precast system was chosen because the planned structure had a typical floor plan. The evaluation of the existing structure showed that the fundamental period was 1.2384 seconds, the mass participation in the X direction was 93.90%, the Y direction was 91.79% with 75 modals, and the most significant floor deviation occurred in the Y direction was 49.57 mm. This value met the requirements according to SNI 2847-2019 and SNI 1726-2019; several beam and column cross-section elements are still unsafe due to the reinforcement being smaller than the analysis result, but the performance level was included in the Immediate Occupancy. The evaluation results of the structure showed that the main beam B2 was 60/80 with the longitudinal reinforcement 8D29, the joist beam B4 was 50/70 and B6 was 40/60 with the longitudinal reinforcement 7D25, the column K1 was 110/110 with the longitudinal reinforcement 28D36. The structural behavior obtained the entire period of 1.6059 seconds, the mass participation in the X direction was 99.30%, the Y direction was 99.24% with 50 modals, and the most significant floor deviation occurred in the Y direction was 28.46 mm. This value met the requirements and performance of the building, including the Immediate Occupancy level. Connections for precast columns used dry joints, while the connections for other precast elements used wet joints.
Kinerja Lapis Pondasi Semen Komposit Tanah Dengan Bahan Tambah Matos Soil Stabilizer Pada Ruas Entikong – Rasau 2 Diana, Nur Ayu; Widodo, Teguh; Asep Syarip Hidayat
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.22180

Abstract

The challenge of implementing a soil cement composite foundation layer (LFSKT) in Indonesia is the availability of soil crushing and soil cement mixing equipment as well as compaction equipment following SKh-2.5.4. especially in remote areas, and quarry soil with a grain content passing sieve no. 200 of less than 35% which met the required UCS value with a maximum cement stabilization of 8%, so additives were needed to achieve the required strength. This paper presents an evaluation of the performance of LFSKT with the addition of Matos soil stabilizer on the Entikong – Rasau 2 Sta. 75 + 000 up to Sta. 90+000. Laboratory mix design to determine the composition of the LFSKT material by carrying out free compression tests of soil-cement and soil-cement-matos mixture specimens. The stages of implementing LFSKT work in the field are carried out following S.Kh. 2.5.4. Free compressive strength tests of field mix, sand cone, and Dynamic Cone Penetrometer, DCP using the Scala Penetrometer were carried out to control the strength and homogeneity of LFSKT. The composition of LFSKT resulting from a laboratory mix design is 8% cement and 2% mate. Based on the UCS value of the field mixture, relative density, SPR and CBR determine the minimum effective thickness limit for LFSKT to meet the strength requirements according to SKh-2.5.4.
Self Compacting Green Concrete (SCGC) Kuat Awal Tinggi Menggunakan CaCO3, Carbide Waste, dan Bottom Ash. Firdaus, Muhammad Zuhal; Sunaryoto, Achmad Firmansyah
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.22227

Abstract

The performance improvement can be done by applying innovative principles in construction projects because the most consumed product on earth besides water is concrete, more than 4 billion tons of carbon dioxide per year is produced from this industry. To reduce this problem, research on the utilization of alternative materials to replace cement in SCC (Self Compacting Concrete) in High Early Strength Concrete is one of the good solutions. Alternatively, using CaCO3 and Waste Calcium Carbide to reduce the amount of cement so that less carbon dioxide is produced and using Bottom Ash as a sand substitute to reduce the cost of fine aggregate. This research aims to obtain SCC concrete with a compressive strength of more than 15 MPa at the age of 1 day with a mixture of these environmentally friendly materials, with the chemical properties of environmentally friendly materials reacting simultaneously, this adds to the optimization of concrete innovations carried out both in terms of concrete compressive strength, environmentally friendly, and reduction of material waste. The results showed an increase in effectiveness in reducing the use of cement but proven of increasing the 1 day Compressive Strength and the effectiveness of carbon dioxide emissions generated by 26.58%.
Pemanfaatan Limbah Karbit Pada Campuran Beton Ringan Sebagai Bahan Tambah ERDIANSYAHPUTRA, B; SHARWANDA ASFARINA
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.22244

Abstract

Lightweight concrete is a rapidly developing technology. It is utilized for a variety of applications, including construction walls, insulation, roofing, and foundation fillers. Because of its low density and energy consumption, lightweight concrete may replace traditional concrete materials, encouraging low-carbon growth. The purpose of this study is to determine the effect of adding carbide waste to the concrete mix composition, as well as to discover the concrete mix that produces the best outcomes. The method is carried out in the form of determining the materials and composition of the mixture to be used, variations in the composition of the mixture with a percentage of 0-35 porsen carbide waste with a ratio of 1Pc: 6Sand, and one variation will be made three test objects and inspected at the age of 7, 14, and 28 days. Making samples involves creating lightweight concrete test items with predetermined composition changes. test items in the shape of 5x5x5 cm cubes. The results showed that the average compressive strength of concrete from a mixture of 0%, 15%, 20%, 25%, 30%, and 35% variation of carbide waste at the age of 28 days was 6.35 MPa, 5.50 Mpa, 5.45 Mpa, 5.32 Mpa, and 4.78 Mpa, and the content weight was 1872.12 kg/m3, 1865.76 kg/m3, 1862.31 kg/m3, 1853.42 kg/m3, 1840. 24 kg/m3, and 1808. 26 kg/m3. The optimal compressive strength of 28-day-old concrete with 15% carbide waste was 5.50 MPa when using a 1Pc:6Psr concrete mix.
Pengaruh Penambahan Serbuk Galam Sebagai Pengganti Agregat Halus Pada Campuran Beton Mutu Normal Anggarini, Elia Anggarini; Dyah Pradhitya Hardiani; M. Rizky Maulana Teguh
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.22342

Abstract

The utilization of waste from wood cuttings is uncommon, and one of the wastes that is rarely employed is the leftovers of galam wood or galam powder cuttings. On this basis, a study entitled "The Effect of Adding Galam Powder as a Substitute for Fine Aggregate in Normal Quality Concrete Mixtures" was carried out. In this study, the experimental approach was used as the research method. The percentage of galam powder waste in fine aggregate, which can range from 0% to 30%, is the independent variable in this study. Other aggregates, such as cement, fine aggregate, coarse aggregate, and water, are the study's dependent variables. The compressive strength of 28-day-old material in the normal combination has a compressive strength of 22.23 MPa, the V10 mixture has a compressive strength of 4.58 MPa, the V20 mixture has a compressive strength of 3.11 MPa, and the V30 mixture has a compressive strength of 1.41 MPa. Based on the findings, it can be concluded that using waste galam powder as a fine aggregate alternative has not been successful since the galam powder does not bind completely to the concrete
Numerical Investigation of Steel Section Remaining Tensile Capacity During SMAW Welding Mushthofa, Malik
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.22374

Abstract

This study investigates a method for calculating the remaining axial tension capacity of thin steel sections during Shielded Metal Arc Welding (SMAW) under load. This necessitates a method to address situations where welding operations must be performed on structures already experiencing stress. Thin sections are particularly susceptible to the elevated temperatures associated with welding. To address this challenge, simulations were utilized to model the effect of the welding heat on thin sections. The simulations considered the temperature rise experienced by each segment within the section. This rise led to a reduction in yield strength, ultimate strength, and elastic modulus for each segment. Subsequently, the partial tension capacity for each segment was calculated based on its area and the reduced strength properties. Finally, the remaining axial tension capacity was determined by summing the tension capacities of all segments. The results revealed a noteworthy correlation between welding parameters and the remaining tension capacity. Higher welding currents were associated with a greater loss of tension capacity, while faster welding speeds resulted in minimizing this loss. The scenario employing the lowest welding current and highest welding speed yielded the most favorable outcome, with the remaining tension capacity reaching 76%, 85%, and 89% for sections of 40.40.4, 50.50.5, and 60.60.6, respectively. Conversely, employing the highest welding current and slowest welding speed significantly reduced the remaining axial tension capacity until there were only 28%, 50%, and 66% left for the respective sections.
Analisa Kerentanan Hunian Tetap di Kabupaten Cianjur dengan Evaluasi Probabilitas Percepatan Gerakan Tanah Syamsi, Muhammad Ibnu; Faizah, Restu; Monika, Fanny; Wicaksono, Imam
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.22393

Abstract

Indonesia is one of the countries that has a fairly high seismic condition. This is because Indonesia is passed by the Pacific Ring of Fire, which brings together many world plates, so it is natural that many earthquakes occur in Indonesia. With a fairly high seismic condition, there is a need for vigilance and actions taken to overcome the situation. The infrastructure sector becomes an important spotlight when an earthquake occurs because casualties are often caused by structural failures that are not strong enough to withstand the earthquake load. This is similar to what happened in the earthquake in Cianjur in 2022, which claimed many lives due to the numerous structural failures in permanent residences. Therefore, this research was conducted to evaluate the permanent residences of the community related to the vulnerability that occurred due to the earthquake. Building vulnerability testing is carried out using the Incremental Dynamic Analysis (IDA) method with data from 11 earthquake records. Later, the building’s response to the earthquake load will be obtained, and the probability of damage seen from the vulnerability curve will be known. The five performance levels of the building are Operational Phase (OP), Immediate Occupancy (IO), Damage Control (DC), Life Safety (LS), and Collapse Prevention (CP).
NILAI FAKTOR KEMANAN PERKUATAN OPRIT JEMBATAN MENGGUNAKAN BAHAN GEOTEXTILE DAN CERUCUK GALAM pada TANAH LUNAK KOTA BANJARMASIN Fitriansyah, Muhammad; Gustie Sambalewa Saky; Irwandy Muzaidi; Elia Anggarini
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.22395

Abstract

Soft soils according to geotechnical guidelines relate to those soils that if not recognized and investigated carefully can cause intolerable long-term instability and settlement problems, such soils have low shear strength and high compressibility, The soft soil layer located in Banjarmasin, South Kalimantan has a thickness of up to 25 m, the average hard soil is found at a depth of about 40 m. The slope of the soil in Banjarmasin is between 0.13% with a geological composition, especially the bottom, dominated by clay with fine sand inserts and alluvium deposits consisting of gray-black and soft clay. The slope of the land in Banjarmasin is between 0.13% with a geological composition, especially the lower part dominated by clay with fine sand inserts and alluvium deposits consisting of grayish black clay and soft Research methods are a way to solve problems or how to develop knowledge with scientific methods. In this study, the analysis used is a comparison of the calculation of reinforcement on the bridge oprit manually with two methods of reinforcing galam cribs and Geotextile materials. The data used in this study used Sondir data for the Labor Intensive Bridge Project, based on the results of the analysis of the decline in galam and geotextile materials. Then it is known the difference in the value of the decline based on the results of the safety factor value of 3.71 and for geotextiles 1.21. From the value of the safety factor obtained, the reinforcement of galam pile is better than using geotextile.

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