Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil

Perbandingan Waktu Proses Perencanaan Gedung Bertingkat Antara Menggunakan Dynamo dan Metode Konvensional pada Revit

2025-09-09T14:46:29+07:00

Building Information Modeling (BIM) is a computer-based technology that facilitates planning activities across various disciplines, including structural, architectural, and mechanical–electrical works. The implementation of BIM in construction projects requires a high level of accuracy to ensure cost efficiency and smooth workflow. This study aims to examine the time differences in material calculation processes using two different methods: the conventional Material Take-Off feature in Autodesk Revit and a custom plug-in developed using Dynamo. The study employs a 3D model of a three-story building as the test object. Work duration was measured using a stopwatch at the beginning of each calculation process to obtain more precise time records. The results indicate that the use of Dynamo significantly accelerates the calculation process, achieving a fivefold speed improvement compared to the conventional Material Take-Off method. Furthermore, the developed Dynamo script can be applied to projects of the same type but with different geometric forms. Therefore, the proposed script is expected to serve as a practical solution for enhancing accuracy and productivity in concrete work planning for BIM-based construction projects.

In Situ Soybean Crude Urease Calcite Precipitation (SCU-CP) untuk Perkuatan Tanah Pasir

2025-09-09T14:46:22+07:00

Sand has low bearing capacity due to its low shear strength and lack of cohesion. Chemical improvement is more effective than physical methods for reinforcing sand, as it does not require heavy equipment. Enzyme-Mediated Calcite Precipitation (EMCP) is a chemical method that uses pure urease enzyme, but it is not economical for field applications. Therefore, the Soybean Crude Urease Calcite Precipitation (SCU-CP) method, which substitutes pure urease with soybeans, is used as a solution. This study applies SCU-CP to reinforce sand at both laboratory and field scales using Cone Penetration Test (CPT) and Unconfined Compression Strength (UCS), with variations of 1, 2, and 3 pore volumes (PV). The study began with testing sand parameters, including gradation, specific gravity, and void ratio. Treated sand samples were tested using CPT and UCS at both scales. Calcite quantification was conducted to determine the amount and distribution of calcite formed. The results show that SCU-CP increased qc values in coarse and fine sand in the CPT test, with the highest values at 3 PV being 1.28 MPa and 2.01 MPa, respectively. Laboratory UCS tests showed maximum values at 3 PV of 331.13 kPa for coarse sand and 104.38 kPa for fine sand. Field UCS tests showed values of 193.19 kPa for coarse sand and 210.84 kPa for fine sand. Calcite distribution was uniform, with actual calcite content reaching 27.66 - 34.10% of the theoretical mass.

Smart Contracts in the Construction Industry: A New Era of Transparency and Efficiency

2025-09-09T14:46:15+07:00

Construction industry often faces challenges such as payment delays, contract disputes, and a lack of transparency and administrative efficiency. Smart contract technology based on blockchain offers an innovative approach to address these issues through transparent, automated, and tamper-resistant systems. This study explores various applications of blockchain and smart contracts in construction projects, including solutions for automated progress payments, digital contract management, quality improvement, and technology-based dispute resolution, using the Systematic Literature Review (SLR) method. Smart contract systems can execute payments automatically based on verified work progress, while blockchain technology ensures secure and immutable data recording. Additionally, integration with technologies such as Building Information Modeling (BIM) and the Internet of Things (IoT) enhances real-time project management. Despite offering numerous benefits, the implementation of these technologies still faces challenges such as regulatory uncertainty, infrastructure readiness, and the need for standardization. This study highlights that the adoption of blockchain and smart contracts holds significant potential to drive efficiency, fairness, and digital transformation in the construction sector.