https://ejournal.unib.ac.id/inersiajurnal <p><strong>Inersia</strong> is a scientific journal for civil engineering researches published by Faculty of Engineering, University of Bengkulu.</p><p>Each volume contains two editions. The first edtion is published in April and the second one in October. This journal accomodates the research result in the area of civil engineering, i.e. Concrete Technology, Construction Management, Geotechnical Engineering, Structural Engineering, Transportation Engineering and Water Resources Engineering</p><p><a title="p-ISSN Inrsia" href="http://issn.pdii.lipi.go.id/issn.cgi?daftar&amp;1344397654&amp;1&amp;&amp;">p-ISSN 2086-9045</a></p><p><a title="e-ISSN Inersia" href="https://portal.issn.org/resource/ISSN/2686-5017" target="_blank">e-ISSN <span>2686-5017</span></a> </p><p><a title="Sinta" href="https://sinta.ristekbrin.go.id/journals/detail?id=7722" target="_blank"><img src="https://journal.ipb.ac.id/public/site/images/kaswanto/Sinta5_OK_resize.png" alt="" /></a></p><p> </p> Universitas Bengkulu en-US Inersia: Jurnal Teknik Sipil 2086-9045 <p>Authors who publish with this journal agree to the following terms:</p><ol type="a"><li>Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a <a href="https://creativecommons.org/licenses/by/3.0/" target="_new">Creative Commons Attribution License</a> that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.</li><li>Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.</li><li>Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See <a href="http://opcit.eprints.org/oacitation-biblio.html" target="_new">The Effect of Open Access</a>).</li><li>This work is licensed under a <a href="http://creativecommons.org/licenses/by-sa/4.0/" rel="license">Creative Commons Attribution-ShareAlike 4.0 International License</a>.</li></ol> https://ejournal.unib.ac.id/inersiajurnal/article/view/35053 <p><em>South Bengkulu Regency is rich in economic potential in the agriculture, plantation, fisheries, and tourism sectors. Adequate roads are key to optimizing this potential. Recognizing this, the South Bengkulu Regency Government has initiated a project to handle long segments on Jl. Kapten Bukhari Gunung Mesir, funded by the Special Allocation Fund (DAK). This report examines the conformity of project planning with the results achieved, as well as the conformity of the implementation schedule with the time required. This evaluation includes a comparison of the results of the work with the initial Budget and Cost Plan (RAB) and a comparison of the implementation time with the original plan.</em></p> <p><em>The evaluation results show that the project is in line with the initial plan, both in terms of the volume of work and the completion time. This has resulted in a significant improvement in road quality. Technical constraints such as bad weather and limited material availability were overcome with effective solutions. The project has generated significant economic and social benefits for the community, such as improved accessibility, time efficiency, and increased safety. Recommendations for future projects include improved coordination, more flexible schedule adjustments, better public awareness, regular monitoring and evaluation, capacity building, and more optimal risk management.</em></p> <p><em>Keywords: Road Infrastructure, Road Rehabilitation, Road Reconstruction, Budget and Cost Plan, S-Curve (Time Schedule)</em></p> Copyright (c) 2025 Teddy Setiawan Setiawan, Nilda Tri Putri https://creativecommons.org/licenses/by-sa/4.0 2025-04-28 2025-04-28 17 1 1 6 10.33369/ijts.17.1.1-6 https://ejournal.unib.ac.id/inersiajurnal/article/view/40922 <div class="page" title="Page 1"> <div class="layoutArea"> <div class="column"> <p>The study aims to find out the impact of the use of fly ash on the compressive strength of geopolymer concrete when compared to normal concrete as well as to know the optimum strength of geopolymer concrete with specified variation of activator mixture. This study uses experimental method by mixing concrete with previous research as references. The specimens used a cylinder mold with a diameter of 10 cm and a height of 20 cm with a specimens age of 7, 14, and 28 days. The total specimens is 36 with the NaOH concentration used was 14 M. The comparative ratio of NaOH and Na2SiO3 for variation I is 1,0 : 0,5, variation II 1,0 : 1,0, variation III 1,0 : 1,5. Geopolymer concrete replaces 100% of the amount of cement in normal concrete with fly ash. Compressive strength value of geopolymer concrete for variation I : 4,883 MPa, variation II : 7,856 MPa and variation III : 10,403MPa and compressive strength value of normal concrete is, 36,943MPa. The compressive strength of geopolymer concrete when compared with compressive strength of normal concrete in this study decreased with 67,28% for 7 days, 72,22% for 14 days, and 71,84% for 28 days. The optimum compressive strength of geopolymer concrete from variation of the activator mixture specified is at variation III with compressive strength of 10,403 MPa</p> <p>Keywords: Geopolymer Mortar, Fly ash, Compressive Strength</p> </div> </div> </div> Copyright (c) 2025 sindy kurniawati, Ade Sri Wahyuni, Agustin Gunawan, Mukhlis Islam, Yuzuar Afrizal https://creativecommons.org/licenses/by-sa/4.0 2025-04-28 2025-04-28 17 1 7 15 10.33369/ijts.17.1.7-15 https://ejournal.unib.ac.id/inersiajurnal/article/view/40600 <div class="page" title="Page 1"> <div class="layoutArea"> <div class="column"> <p>This research aim to knowing about the problems of flooding and standing water on Parit 2 channel in Riak Siabun 1, Seluma regency that occur continuously every rainy season. This indicates that water volume which come into channel exceed the normal capacity of channel. Calculation of discharge with the rational methods use 3 primary factors, they are maximum rainfall intensity, wide of area and run off coefficient. The method of analysis used in this study include hydrologic analysis using Gumbel Distribution method which calculates the discharge capacity of the channel and hydraulic analysis to channel normalization. The result of the calculation shows that the channel capacity (Qs) in Parit 2 is 1.95 m3/sec with the upper width 0f 3,9 m; width of 2,74 m and wet cross section 0,744 m smaller than compared to flood peak discharge (QP) of 2,525 m3/sec. It is necessary to normalize the channel by reviewing the channel with a upper width of 4,5 m; width of 3 m and wet coress section 1 m so as to obtain channel discharge of 4,63 m3/sec, then the planning channel can be received.</p> <p>Keywords: flood, debit, intensity, channel normalization</p> </div> </div> </div> Copyright (c) 2025 Dwi Jenita Maharani, Besperi Besperi, Muhammad Fauzi https://creativecommons.org/licenses/by-sa/4.0 2025-04-28 2025-04-28 17 1 16 24 10.33369/ijts.17.1.16-24 https://ejournal.unib.ac.id/inersiajurnal/article/view/40294 <div class="page" title="Page 1"> <div class="layoutArea"> <div class="column"> <p>Traffic impact analysis is an important activity for the continuity of smooth traffic circulation with the presence of new activity centers that generate new flows. This study focuses on analyzing the impact of beauty clinic operations in South Jakarta on several road sections that are considered to have an impact. There are four road sections that are analyzed. Traffic performance analysis in this study uses the PKJI 2023 method to determine the capacity of the road section and continues to determine the level of road service according to the Minister of Transportation's PM number 96 of 2015. After analyzing traffic performance based on the results of the traffic census, the existing conditions in 2024 were found to have road sections at levels B and C. To determine future traffic predictions, a further analysis was also carried out, namely the calculation of predicted services after 5 years of clinic operations with existing traffic growth conditions. The results of the analysis show that the level of road service has decreased to level F in the next 5 years. From the results of the analysis, the recommendations given are in the form of planning for the construction of flyovers and the development of public transportation network services that can be accessed by consumers of the beauty clinic.</p> <p>Keywords: analysis of traffic, PKJI 2023, road performance, forescasting</p> </div> </div> </div> Copyright (c) 2025 Anasya Musdalifah Syarifuddin Syarifuddin, Agus Budi Purwantoro https://creativecommons.org/licenses/by-sa/4.0 2025-04-28 2025-04-28 17 1 25 31 10.33369/ijts.17.1.25-31 https://ejournal.unib.ac.id/inersiajurnal/article/view/40549 <p>Penjadwalan proyek merupakan elemen utama dalam perencanaan konstruksi yang bertujuan untuk menentukan waktu pelaksanaan proyek berdasarkan urutan aktivitas dari awal hingga selesai secara tepat waktu. Penelitian ini menggunakan metode Critical Path Method (CPM) dan Project Evaluation and Review Technique (PERT) untuk mengatasi tantangan penjadwalan dalam proyek konstruksi rumah. Tujuan utama dari penelitian ini adalah untuk mengidentifikasi jalur kritis dalam proyek serta mengevaluasi durasi proyek, dengan menggunakan pendekatan CPM dan teknik crashing untuk mempercepat penyelesaian kegiatan yang ada di jalur kritis. Data primer yang digunakan mencakup kurva S, bar chart, serta data langsung dari pihak pelaksana proyek perumahan Pondok Alam Sigara-Gara. Hasil penelitian menunjukkan bahwa terdapat dua jalur kritis dalam proyek ini, yaitu jalur A - E - F - G - M - N - P - Q dan jalur B - C - D - I. Dengan metode CPM, durasi proyek yang awalnya 30 hari dapat dikurangi menjadi 25 hari. Penerapan PERT dengan crashing menunjukkan hasil yang bervariasi: percepatan 1 hari menghasilkan durasi 22 hari dengan tambahan biaya Rp11.280.000, percepatan 2 hari menghasilkan durasi 21 hari dengan tambahan biaya Rp14.100.000, dan percepatan 3 hari menghasilkan durasi 22 hari dengan tambahan biaya Rp12.690.000. Hasil analisis menunjukkan bahwa penambahan tenaga kerja lebih efektif daripada lembur dalam hal efisiensi biaya dan durasi proyek.</p> Copyright (c) 2025 Nela permata sari Lubis, Khalid Bima Purnomo1; Melloukey Ardan https://creativecommons.org/licenses/by-sa/4.0 2025-04-28 2025-04-28 17 1 32 43 10.33369/ijts.17.1.32-43