Jurnal Ilmiah Telsinas Elektro, Sipil dan Teknik Informasi

Aggregate Gradation Influence on Marshall and Stiffness of AC-WC Mixtures

2026-03-13T04:10:39+00:00

Aggregate gradation plays an important role in determining the performance of asphalt mixtures used in road pavement structures. Numerous studies have investigated the influence of aggregate gradation on Marshall characteristics and volumetric properties of asphalt mixtures. However, limited studies have examined the combined effect of aggregate gradation variations within the specification limits on both Marshall characteristics and stiffness performance of AC-WC mixtures. In addition, the influence of proportional gradation variations across the specification envelope has not been widely discussed. Therefore, this study aims to investigate the influence of aggregate gradation variations within the specification limits of Asphalt Concrete Wearing Course (AC-WC) on optimum asphalt content, Marshall characteristics, and mixture stiffness. Five aggregate gradation variations were prepared using the proportional method based on gradation limits. Laboratory tests were conducted using Marshall testing and Indirect Tensile Stiffness Modulus (ITSM) to evaluate mixture performance. The results show that aggregate gradation significantly affects the optimum asphalt content and mechanical characteristics of the mixture. Finer aggregate gradation increases the aggregate surface area and requires higher asphalt content. The optimum asphalt content for different gradation variations ranged from 5.7% to 6.3%. In addition, finer gradation produced lower air voids (VIM) and resulted in higher Marshall stability and mixture stiffness. These findings indicate that aggregate gradation has a significant influence on the volumetric and mechanical properties of AC-WC mixtures.

Risk Management In The Flood Control Project Of Tukad Unda, Klungkung Regency

2026-03-13T04:00:28+00:00

The Tukad Unda Flood Control Project was implemented to support river normalization and spatial planning efforts aimed at reducing flood risks in Klungkung Regency. However, the project faces significant challenges due to its location in flood-prone, swamp, and coastal areas, which increase the likelihood of risks during construction. This study aims to identify potential project risks, assess risk acceptance levels, develop appropriate mitigation strategies, and allocate risk ownership among stakeholders. A mixed-method approach combining quantitative and qualitative descriptive analysis was employed. Primary data were collected through surveys and group discussions, while secondary data were obtained from relevant literature. Respondents were selected using purposive sampling based on their professional roles and experience in the project, representing owners, consultants, and contractors. A total of 37 risk variables were identified and analyzed using validity and reliability tests to ensure data consistency. The results indicate four levels of risk acceptance: unacceptable (2.70%), undesirable (37.84%), acceptable (37.84%), and negligible (21.62%). Fifteen dominant risks were identified, requiring mitigation through risk avoidance and risk reduction strategies. These findings highlight the importance of experience-based risk assessment in improving the effectiveness of construction project management.

Analysis of Drainage Channel Dimensions at Villa Terracotta in Badung Regency

2026-03-07T02:29:42+00:00

The development of Villa Terracotta in Ungasan Village, South Kuta District, Badung Regency faces potential water ponding problems due to a drainage system that does not conform to the existing topographic conditions. This study aims to evaluate drainage capacity and design an appropriate channel dimension to prevent overflow. The research applies a quantitative approach using hydrological and hydraulic analysis. Design rainfall was determined using the Gumbel distribution after conducting Smirnov–Kolmogorov and Chi-square goodness-of-fit tests. Rainfall intensity was calculated using the Mononobe method, while hydraulic performance of the drainage system was simulated using the EPA-SWMM model. The study area covers 0.27 ha with elevations ranging from 109.5 m to 111.5 m above sea level. The calculated rainfall intensity ranges from 24.84 mm/h for a 2-year return period to 54.78 mm/h for a 50-year return period with a rainfall duration of 1 hour. Simulation results show that the downstream channel has a maximum flow depth of 0.43 m. A channel dimension of 0.30 m width and 0.55 m height produces a freeboard of 27.9%, which falls within the recommended safety range of 5%–30%, indicating that the designed channel is hydraulically safe against overflow.