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All Journal J-Sil (Jurnal Teknik Sipil dan Lingkungan) Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Prosiding Seminar Nasional Teknoka Jurnal Redoks Jurnal Ilmu Ekonomi Manajemen dan Akuntansi Premium: Insurance Business Journal Sinergi International Journal of Economics J-Sil (Jurnal Teknik Sipil dan Lingkungan)
Erizal
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Environmental Science Industrial & Manufacturing Engineering Social Sciences Transportation

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Journal : J-Sil (Jurnal Teknik Sipil dan Lingkungan)

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Improvement of the Shear Strength and Reduction of the Permeability of Sandy Soil using Soybean Crude Urease Calcite Precipitation (SCU-CP) Erizal; N Annisa, Chika; Putra, Heriansyah; Apriadi
Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 1: April 2025
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.10.1.27-34

Abstract

Calcite precipitation is a sustainable soil improvement method because it can increase soil strength and is environmentally friendly. This study aimed to evaluate the use of an innovative soil improvement method, namely soybean crude urease calcite precipitation (SCU-CP), in modifying the strength and permeability of sandy soil. Two types of reagents based on their purity, namely pro analysis (PA) and technical (technical grade), combined with two types of soybeans, namely seeds (conventional) measuring 0.1–0.5 mm and manufactured soybean powder measuring <0.1 mm, were used in this study as the main ingredients in the preparation of calcite. This research was conducted using various tests, including test-tube testing, soil characterization, compressive strength testing (UCS), and permeability testing. The results showed that the variation in reagent purity had no significant effect on the sand soil parameters. Technical and pro-analytical reagents can produce significant soil strength in soils with UCS values >50 kPa and reduce permeability by 50%. Meanwhile, soybean type is an important parameter affecting soil strength in the SCU-CP method. The smaller size of the soybean can lead to a large amount of soybean content in the SCU-CP solution, which affects the disruption of the calcination and bonding process in the soil. This study also showed that the variation in curing time had no significant effect on the soil properties. This study concluded that the particle size of soybean powder is an important factor in the SCU-CP method.
Risk Analysis of Time and Cost Factors in the Renovation Project at Vimala Hills Residential Area Vigie Priantika Putra Hutama; Erizal; Satyanto Krido Saptomo; Naufal Rudini
Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.10.2.385-396

Abstract

Construction projects always have uncertainties even in small projects, especially in terms of time and cost. This study aims to identify and analyze the dominant risks in home renovation projects in Vimala Hills Bogor and design mitigation strategies. Data collection was carried out by distributing questionnaires to all project implementers. Data analysis used the severity index method to measure frequency and severity combined with biserial point tests and KR-20 to measure the validity and reliability of 15 risk variables with 30 respondents directly involved in the project. The results showed that there were two dominant risks in the high category, namely bad weather conditions (frequency of 80,00%, impact of 77,50%, and risk value of 16) and change of work (frequency of 56,67%, impact of 64,17%, and risk value of 12). Other risks are in the medium to low category. The mitigation strategies implemented include adjusting work schedules based on weather forecasts, protecting work areas, finalizing the design before construction begins, and implementing formal procedures for work changes. After mitigation, the risk value of the two dominant variables dropped to the low category. These findings confirm the importance of implementing risk management even on small scale projects to prevent delays and cost overruns and increase efficiency so that contractors can achieve optimal project goals in the future.
Evaluation of the Seismic Performance of The X Building Structure in West Jakarta Using Nonlinear Pushover Static Analysis Faradhilla, Nafisha; Erizal; Sekar Mentari
Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.10.2.307-318

Abstract

Jakarta, which is close to the earthquake path, has a high potential for seismic hazards, so building structures must be designed to withstand earthquakes. The X Building, located in West Jakarta, is expected to have an earthquake-resistant structure, evaluated using pushover analysis. This study aims to assess the performance of the X Building structure against earthquake loads using pushover analysis with ETAS software. X Building underwent translation in patterns 1 and 2, followed by rotation in pattern 3. The value of the structure period in the X direction is 2.578 seconds, and in the Y direction is 2.252 seconds. The mass participation requirement has been met, with a participation rate of 90% or higher in all three directions. There is torsional irregularity in the Y direction. The dynamic shear force after scaling is 10,503.93 kN (X) and 10,503.94 kN (Y). When the performance point is reached, the roof displacement is 623.182 mm (X) and 513.267 mm (Y). The total number of plastic hinges is 2774 in the X direction and 2330 in the Y direction. The structural performance level obtained is Damage Control (DC). The ductility value in the X direction is 1.31, and in the Y direction is 1.12.
Analysis of Road Surfacing Using the Pavement Condition Index (PCI) and Surface Distress Index (SDI) Vikram, Dio; Erizal; Apriadi
Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.10.2.337-346

Abstract

A roadway is an important infrastructure for the smooth flow of the economy. High traffic volume and frequent use decrease the quality of the road and affect traffic comfort. It is important to maintain roads regularly, effectively, and efficiently. The PCI and SDI methods are effective ways to evaluate road damage advantages reflecting the actual condition of the damage. This study aim to analyze the condition of the road and comparing the maintenance cost based on assessment result from this two methods. The location conducted on connecting road at Cilubang Mekar Road in the city of Bogor. The survey covered damage such as alligator cracking, edge cracking, shoulder settlement, patching, potholes, and deterioration. The PCI value was 66.92, indicating a moderate rating, and the SDI value was 35, indicating a good rating. The recommended methods for handling the severity using the City Road Maintenance System Guidelines No. 02/P/BM/2025 are P2 (paving), P5 (patching), P6 (leveling), and U3 (regrading). An overlay of 4 cm is also recommended. The estimated cost of repairing the Cilubang Mekar road is Rp 50,021,000 based on the PCI method and Rp 30,336,000 based on the SDI method. However, since patching and potholes significantly impact the road, it is sufficient to use the SDI method for repairs.
Co-Authors Anas Miftah Fauzi Apriadi, Apriadi Arief Budiman Augustin, Elfira Awaloedin, Mulawarman Azmi Ulwan Dasuki Bambang Irawan Faradhilla, Nafisha Febrianto, Ari Febrita, Joana Hukama, Raihan Daffa Kamarudin, Adan Lelawati Lie, Antonius Anton Lina Karlinasari Lubis, Fazrina Andriani Sakinah M. Nasution, Idham Muhammad fauzan Muhammad Halil Muhammad Hilmi Murodif, Atfal N Annisa, Chika Naufal Rudini Nurasih, Sefta Mega Nurrahim, Eka Julianti Oktaviani, Rara Putra, Heriansyah Robidi Sabil, Dairan Satyanto Krido Saptomo Sekar Mentari Septiadi, Mutia Rachmawati Slamet Widodo Ulil Albab, Ahmad Vigie Priantika Putra Hutama Vikram, Dio