WORLD JOURNAL OF CIVIL ENGINEERING

Optimization of Budget Planning for Irrigation Canal Rehabilitation to Enhance Project Efficiency

Agus Awang Syahbandi, Alpian Nur, Habir — Fri, 31 Oct 2025 00:00:00 +0000

This study aims to optimize the budget planning for the rehabilitation of the Rempanga – Bukit Biru irrigation canal in Tenggarong, Kutai Kartanegara, East Kalimantan. The focus of this research includes accurate estimation of construction costs, identification of key cost components, provision of a solid basis for project budget planning, and ensuring the economic feasibility of the project. Data were collected through field surveys, technical documentation, and lists of material and labor prices, followed by detailed cost calculations using the standard analysis of the Ministry of Public Works and Housing. The cost estimation revealed that concrete masonry work constitutes the largest share of the total budget, followed by stone masonry and earthwork. Budget optimization was carried out by identifying major cost components and applying value engineering principles. This analysis emphasizes the importance of precise cost planning to support project implementation efficiency, as well as the potential for risk control to minimize material and time wastage. The findings of this research can serve as a reference for similar projects in regions with comparable geographical and technical challenges. Future research is recommended to integrate digital technologies such as Building Information Modeling (BIM) for real-time cost simulation and integrated project management.

Analysis of the Impact of the Implementation of the Construction Safety Management System (SMKK) on the Cost and Time of Implementation of the River Normalization Project

Noordiansyah, Alpian Nur, Eswan — Fri, 31 Oct 2025 00:00:00 +0000

The implementation of the Construction Safety Management System (SMKK) has become a regulatory mandate in Indonesia and plays a vital role in enhancing infrastructure project performance. This study aims to evaluate the impact of SMKK implementation on cost and time performance, using the Kali Banter River normalization project in Desa Tani Bhakti, Loa Janan District, Kutai Kartanegara Regency as a case study. The project had a contract value of IDR 777,777,700, with safety-related allocations—covering personal protective equipment (PPE), training, signage, insurance, and safety personnel—constituting 3.61% of the total budget. A quantitative descriptive approach was applied to assess cost distribution and time deviations based on weekly progress reports. The results indicate that, despite its relatively low financial allocation, the SMKK significantly contributed to the project being completed on schedule, with zero deviations across the 13-week execution period. These findings suggest that safety investments are instrumental in mitigating operational risks and ensuring schedule adherence. The study highlights the importance of integrating SMKK not only as a regulatory requirement but also as a strategic and cost-effective management approach. Furthermore, it underscores the need for local governments and contractors to reinforce their commitment to construction safety culture, particularly in public infrastructure development.

Evaluation of Drainage Project Performance Based on Progress Relative to the Budget Plan

Muhammad Ade Rizqi, Alpian Nur, Tukimun — Fri, 31 Oct 2025 00:00:00 +0000

Drainage system development projects are an essential component of basic infrastructure, aimed at managing surface water and preventing flooding in densely populated areas. This study aims to evaluate the performance of the Loa Janan – Rapak Dalam drainage construction project based on actual physical progress against the Cost Budget Plan (RAB) as of the project completion date on December 20, 2024. The method used is a descriptive-quantitative approach by analyzing the deviation between planned and actual work weights across each work division. The results show that the cumulative physical progress of the project reached only 89.10% of the planned total, with a negative deviation of 10.90%. The value of theunfinished work was recorded at IDR 1,302,680,901.61. The largest deviations occurred in Division B (Drainage Channel Works) and Division D (Utilities), amounting to IDR 875,941,805.88 and IDR 416,739,095.73 respectively. One of the main causes of delay was the prolonged process of relocatingexisting utilities, which hindered fieldwork execution. This study demonstrates that progress-based evaluation against the budget plan can provide an objective view of project performance and serve as afoundation for technical decision-making and future improvements in project management.

Evaluation of the Feasibility of Paving Block Bottom Ash as a Material Alternative in Construction Projects

Muhammad Nurhidayad, Tukimun, Wahyu Mahendra Trias Admadja — Fri, 31 Oct 2025 00:00:00 +0000

Coal is one of the fossil fuels that is still widely used in Indonesia as an alternative to petroleum. The use of coal as a fuel for power plants produces waste, one of which is bottom ash. Bottom ash is waste that comes from the remaining coal combustion that is in the combustion furnace at the bottom. The negative impact of bottom ash is that it can pollute the environment and health problems because bottom ash contains heavy metals. Concrete bricks (Paving Block) is a type of non-structural concrete that can be used for roads, parking lots, sidewalks, parks and other purposes. Paving blocks are made from a mixture of Portland cement type I and water and aggregate as fillers. Paving blocks can be colored like the original color or given dyes in the composition and used for flooring both inside and outside the building. Paving blocks are starting to be germinated because they have several advantages, in addition to being easy to manufacture and install, paving blocks have a unique aesthetic value if designed with beautiful patterns and colors, a lower price comparison compared to other types of conventional pavement and can be produced manually, so that the demand for cement for raw materials used in the manufacture of paving blocks will increase. The use of bottom ash has been widely used as a paving block, but bottom ash can reduce the physical quality of paving blocks. Therefore, this study aims to determine the physical characteristics of paving blocks. Based on the results of the research that has been carried out, bottom ash can reduce the compressive strength of paving blocks, namely PB0 22.4 Mpa, PB1 21.0 Mpa, PB2 9.2 Mpa.

Technical Planning of the Multipurpose Building at SMPN 1, Sangatta Utara Subdistrict: A Review of Structure, Utilities, and Supporting Documents

Hendra Cipta Puluala, Tukimun, Wahyu Mahendra Trias Admadja — Fri, 31 Oct 2025 00:00:00 +0000

The planning of a multipurpose building within a school environment plays a vital role in supporting educational, social, and cultural activities. SMPN 1, Sangatta Utara Subdistrict, as one of the public schools in East Kutai Regency, requires a representative multipurpose facility. This planning activity aims to produce a comprehensive set of technical documents as the foundation for construction implementation. The planning approach was carried out in stages, beginning with field studies and progressing to the development of technical drawings and tender documents. The final planning deliverables include the preliminary to final reports, soil investigation results (Sondir and PDA), structural calculations, complete working drawings, and procurement documents such as the Bill of Quantities (BoQ), technical specifications, and Engineer’s Estimate. The results of this planning process are expected to serve as a valid reference for the construction of a building that is safe, efficient, and compliant with technical standards.

Time Performance and Project Progress Analysis of the KM 13 Samboja Government Building Project Based on the Realized Schedule

Reiza Irwani Ahman, Habir, Benny Mochtar Effendi Arifin — Fri, 31 Oct 2025 00:00:00 +0000

This section consists of single paragraph and about 250 words maximum. For research articles, abstracts should give a pertinent overview of the work. We strongly encourage authors to use the following style of structured abstracts, but without headings: Construction management plays a crucial role in the success of infrastructure projects, especially in managing time and schedule. Government infrastructure projects require strict schedule monitoring to ensure on-time completion and efficient resource use. This study analyzes the time performance of the KM 13 Samboja Government Building Project (Fiscal Year 2024), which has a 23-week duration, using actual schedule data. A quantitative descriptive case-study approach was used to examine secondary data from the project’s realized time schedule documents. The analysis focuses on comparing the planned versus actual weekly and cumulative progress, including the calculation of weekly deviations. The results show that the project experienced significant time performance fluctuations. In the early period (weeks 2–12), there were notable negative deviations indicating delays in weekly progress. However, from weeks 13–21 the project saw a drastic acceleration, with weekly actual progress exceeding the planned schedule. By the final reporting period (week 24), the cumulative project progress reached 100%, matching the planned target. The conclusion is that although the project faced early challenges and delays, the project team successfully compensated by accelerating work, ultimately completing the project on time. This outcome highlights the importance of adaptive oversight and control in construction management to address schedule variances and ensure project success.

Slum Area Revitalization Planning Based on 7+1 Indicators: A Case Study in RT 44 and RT 54, Teluk Lingga Sub-District, Kutai Timur Regency

Indra Wahyu Hidayat, Alpian Nur, Hence Michael Wuaten — Fri, 31 Oct 2025 00:00:00 +0000

Slum Settlement Issues in urban areas are a consequence of population growth that is not matched by adequate infrastructure provision and spatial planning. Sangatta City, particularly RT 44 and RT 54 in Teluk Lingga Sub-district, is one such area experiencing environmental degradation due to substandard housing conditions. This study aims to develop a Masterplan and Detailed Engineering Design (DED) as the foundation for revitalizing the slum area. The methodology combines normative approaches (regulatory-based), participatory-facilitative methods (involving the community and local stakeholders), and technical-academic analyses (based on field data and technical assessment using the 7+1 slum indicators). The findings reveal various issues in the Teluk Lingga area, including irregular building arrangements, damaged neighborhood roads, open drainage channels, lack of clean water supply, non-standard wastewater and solid waste management systems, and the absence of fire protection infrastructure and street lighting. The planning documents produced include a site plan, technical drawings, work specifications, cost estimates, and a construction implementation schedule. Technical recommendations for RT 44 and RT 54 include concrete pavement for roads, installation of public street lighting (PJU), covered drainage systems, provision of fire hydrants, and additional waste disposal points. These outcomes are expected to serve as a practical guide for physical development implementation and to contribute to achieving national targets for slum area alleviation.Area Revitalization