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Jurnal Manajemen Teknologi dan Teknik Sipil (JURMATEKS)
Published by Universitas Kadiri
ISSN : -     EISSN : 26217686     DOI : http://dx.doi.org/10.30737/jurmateks
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Transportation
JURMATEKS (Jurnal Mahasiswa Teknik Sipil) diterbitkan oleh Program Studi Teknik Sipil, Fakultas Teknik, Universitas KADIRI untuk menampung hasil penelitian, tugas akhir maupun tugas proyek mahasiswa teknik sipil di lingkungan Universitas KADIRI.
Arjuna Subject : Teknik (semua kategori) - Bangunan dan Konstruksi
Articles 313 Documents
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Karakterisasi Mortar Geopolimer terhadap Penambahan Kapur Berbasis Abu Terbang dan ASP dengan NaOH 10 Molar Sibuea, Maria Enjelina; Wardhono, A.
Jurnal Manajemen Teknologi & Teknik Sipil Vol. 8 No. 1 (2025): JUNE
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jurmateks.v8i1.6593

Abstract

Cement which is the main material for making concrete has a negative impact on environmental, namely producing carbon emissions. One alternative to overcome this, is the use of fly ash and rice husk ash as a cement substitute. The addition of lime, which is a form of CaO, functions to increase the reactive properties of class C fly ash. The concrete curing process is carried out at room temperature, because the properties of lime itself speed up the hardening process. This research aims to determine the best ratio for adding lime in terms of compressive strength, porosity and setting time. Lime was added with several variations, namely 1%, 2.5%, 5%, 7.5%, and 0% as a control. The results of this research on the addition of lime to geopolymer mortar are reducing the compressive strength value, increase porosity, and extends setting time. Mortar with 7.5% lime compared to 1% lime, has lower compressive strength (1.12 MPa: 7.70 MPa), higher porosity (32.91%: 18.72%), and longer setting time (270 minute: 240 minute). However, if mortar with 1% lime compared to normal gepolymer without lime, has better results. Higher compressive strength (7.70 MPa: 5.63 MPa), lower porosity (18.72%: 22.93%), and fast setting time (240 minute: 495 minute). So the results of this research, a slight change in the lime portion can make a significant difference, excessive additions will disrupt the geopolymer reaction.
Optimasi Waktu dan Biaya Proyek Gelanggang Olahraga Kalimantan Selatan dengan Metode Time Cost Trade-Off Widiastuti, Endah; Sugiarti, Maesa Fitri; Yuliana, Candra; Karim, Abdul
Jurnal Manajemen Teknologi & Teknik Sipil Vol. 8 No. 1 (2025): JUNE
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jurmateks.v8i1.6597

Abstract

Construction projects often face delays and cost overruns due to material delays, labor shortages, and adverse weather. In the Sports Building project in South Kalimantan, a 17-day delay beyond the planned 270-day schedule increased costs, risk of penalties, and threatened the contractor’s reputation and project sustainability. Therefore, accelerating completion is essential to reduce losses. Overtime on critical path activities is a common acceleration method but requires careful analysis since excessive overtime can reduce productivity and raise costs. This study aims to analyze alternatives for accelerating the duration of the construction of a sports arena in South Kalimantan using the Time Cost Trade-Off (TCTO) method. TCT) method is applied, focusing on adding 2, 3, and 4 hours of overtime per day on critical path tasks. The approach integrates actual project data, regulations, and productivity factors to develop effective acceleration strategies. Results show that adding 3 hours of overtime daily is the most efficient, reducing duration from 287 to 283 days and saving IDR 71,652,415.38. However, the 270-day target is not yet met, requiring further crashing. This paper presents only one crashing iteration as a practical simulation to demonstrate the method and potential outcomes. Future crashing will focus on tasks with the lowest cost slope while considering task dependencies.
Efisiensi Proyek Perumahan Green Teksin Tegal melalui Rekayasa Nilai: Pendekatan AHP dan Analisis Biaya Siklus Hidup Putra, Benny Hermana; Wulandari , Dewi Ayu
Jurnal Manajemen Teknologi & Teknik Sipil Vol. 8 No. 1 (2025): JUNE
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jurmateks.v8i1.6647

Abstract

The construction sector significantly contributes to Indonesia's economic growth. However, this sector continues to face challenges in achieving cost efficiency and sustainability, particularly in medium-scale housing projects. This study aims to evaluate the application of Value Engineering (VE) in the Green Teksin Tegal Phase 2 Housing Project, focusing on optimizing material selection, construction techniques, and project management to enhance efficiency and effectiveness. A combined quantitative and qualitative methodology was utilized, incorporating the Analytical Hierarchy Process and Life Cycle Cost Analysis. Data collection involved project documentation reviews, structured stakeholder interviews, and site observations. Findings identified substantial cost-saving alternatives, including thin plastering (skimming), low cement-sand mixture concrete blocks, and laminated High-Density Fiberboard doors. These alternatives demonstrated savings of approximately 8.46%, 16.81%, and 20%, respectively. The study acknowledges obstacles such as fluctuating material prices, environmental regulations, and stakeholder preferences, recommending strategic solutions to mitigate these issues. The project's long-term economic viability and environmental sustainability can significantly improve by addressing these challenges. This research contributes valuable insights into cost-effective project execution, highlighting Value Engineering’s potential to enhance future residential construction projects' quality, sustainability, and economic viability, ultimately benefiting broader urban development and environmental conservation initiatives.

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