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INDONESIA
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia
Published by Universitas Tribhuwana Tunggadewi
ISSN : 25033654     EISSN : 25032682     DOI : -
Core Subject : Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Industrial & Manufacturing Engineering
Focus and Scope of this journal are : Chemical Engineering including : bioenergy processing, environmental engineering, natural resource management, Heat and Mass Transfer, Chemical Reaction, Analytical Chemistry, Biochemistry, Designing tools and chemical processes, Chemical industry process, Computing and modeling (simulation) process, Particle and nano technology, membrane technology, esessential oil technology, and phytopharmaca, etc. Civil Engineering including : technology of construction materials, transportation system, environmental layout, concrete and wood structures, steel construction, bridge and dam construction, management of water resources and Hydrology, earthquake engineering, sanitation systems and urban drainage.
Arjuna Subject : -
Articles 197 Documents
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Modification of Cellulose Acetate Membrane in Textile Wastewater Treatment to Improve Antifouling Properties Pramedikawati, Trias; Maryudi, Maryudi; Permadi, Adi; Mufrodi, Zahrul; Lestari, Riani Ayu
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.8249

Abstract

The growth of the textile industry in Indonesia contributes positively to the economy, but simultaneously generates hazardous wastewater containing synthetic dyes and persistent organic compounds. The primary challenge in treating this effluent is fouling of cellulose acetate (CA) membranes, which reduces filtration efficiency and shortens operational lifespan due to pollutant accumulation. This study aims to evaluate various CA membrane modification strategies to enhance their physicochemical characteristics and antifouling properties. The discussion covers the integration of additives, including metal oxides (TiO?, ZnO), polymers (PEG, chitosan), and carbon-based materials (GO, CNT), which have been shown to form a stable hydration layer on the membrane surface. The review results indicate that these modifications significantly increase hydrophilicity, improve dye rejection up to 85 percent, and achieve a flux recovery ratio exceeding 90 percent. In conclusion, CA membrane modification via surface engineering is an effective solution for enhancing filtration performance and improving the sustainability of textile wastewater treatment.
Optimization of Polypropylene Waste Content in Dry-Mix Hot Mix Asphalt Using Polynomial Regression Wadu, Amy; Sodanango, Mateus; Nenobais, Obed
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.7901

Abstract

Polypropylene (PP) plastic waste is a serious problem in Indonesia due to the high volume of poorly managed plastic waste, while, on the other hand, road pavements often suffer damage due to traffic loads and extreme weather. The solution to overcome this problem is to optimize the use of PP waste in Hot Mix Asphalt (HMA) mixtures using a dry method to improve the structural performance, flexibility, and durability of road pavement while utilizing plastic waste. A factorial experimental design was applied to four levels of PP percentage to the total aggregate weight, namely 0%, 2.5%, 5%, and 7.5%. Each mixture sample was prepared according to the SNI 06-2489-1991 procedure, then tested using the Marshall method to determine the stability and flow values. The volumetric parameters of Voids in Mix (VIM), Voids in Mineral Aggregate (VMA), and Void Filled Asphalt (VFA) were also measured to evaluate the pore structure and inter-aggregate bonding. The test results showed an increase in stability values to more than 800 kg and an increase in VFA values with the addition of PP, indicating an increase in cohesion and deformation resistance. Meanwhile, VIM and VMA decreased but remained within the permitted specification range (VIM 3–5% and VMA ?15%). Polynomial regression analysis identified that a PP percentage of 6.47% provided the optimal combination of stiffness and flexibility: average stability of 954,41 kg, average flow of 3.1 mm, VIM of 4.2%, VMA of 16.3%, and VFA of 74.3%. Thus, the use of 6.47% PP waste is recommended as the optimum content in dry-mix asphalt. This approach not only supports the principles of circular economy and waste management but also improves the technical performance of road pavements.
Production of Nanocrystalline Cellulose from Cassava Stems Using Hydrochloric Acid Hydrolysis Method Permatasari, Mauludiah; Anggraeni, Shinta Ristiana; Triana, Nurul Widji; Muljani, Srie; Sani, Sani
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.8339

Abstract

Nanocrystalline cellulose (NCC) is a fiber-based material with one dimension in the nanometer scale (1–100 nm), featuring high specific surface area, excellent mechanical strength, and biodegradability. It has great potential as an environmentally friendly polymer filler. This study aims to synthesize nanocrystalline cellulose from cassava stem waste via acid hydrolysis with 32% hydrochloric acid (HCl) and to examine the effects of varying sample weight and HCl volume on particle size and morphology. The process involved delignification using sodium sulfite, bleaching with hydrogen peroxide, and acid hydrolysis. Sample weights (5–9 grams) and HCl volumes (50–90 mL) were varied. PSA results showed the smallest particle size was 5,564.2 nm (5 g, 70 mL) and the largest was 23,132.1 nm (9 g, 50 mL). PDI indicated a more homogeneous particle distribution at higher HCl volumes. SEM analysis revealed that the typical NCC structure had not yet been optimally formed. Therefore, further optimization of the synthesis process is necessary, highlighting the importance of refining each step to achieve desired nanomaterial properties.
Hydraulic Analysis of the Morning Glory Spillway at the Manikin Dam Banamtuan, William Fr.; Krisnayanti, Denik Sri; Hangge, Elsy E.; Klau, Ralno Robson
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.7579

Abstract

In this research, the Manikin Dam will use a Morning Glory-type spillway structure. The dam, which draws its water from the Manikin River and has a watershed area of 49.31 km², is designed as a Random Rubble Limestone Fill Type with a Vertical Core. It has a storage capacity of 28.20 million m³ and a normal inundation area of 148.7 hectares. The Manikin Dam is planned to meet the irrigation needs of 310 hectares of agricultural land in Kupang Regency and serve as a raw water source of 700 liters/second for both Kupang City and Kupang Regency. It will also function as a Micro-Hydro Power Plant (PLTMH) with a capacity of 0.125 MW and provide flood control with a capacity of 531.70 m³/second. Based on technical data, the dam has an inlet diameter of 11.78 m, a throat section length of 20 m, and a tunnel length of 610.74 m. This study uses quantitative data, including both primary and secondary sources. The objective of this research is to determine the flow characteristics within the Morning Glory spillway structure when subjected to a 1000-year design flood discharge (Q1000). The hydraulic analysis of the spillway uses the continuity equation and Bernoulli's equation, with the discharge coefficient (Cd) calculated using the Iwasaki method approach. Based on the research results, the flow within the tunnel and downstream of the stilling basin is supercritical.
Optimization of HRS-WC Mixture with Excavation Waste C and Beach Sand as Alternative Materials for Road Pavement Saputra, Asrul; Iqbal, Iqbal; Afandi, Ahmad Rijal; Hatala, Fahmi Idris
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.8042

Abstract

This study aims to evaluate the feasibility of incorporating Type C excavation waste and beach sand as alternative fine aggregate and filler materials in Hot Rolled Sheet–Wearing Course (HRS-WC) mixtures. A laboratory-based experimental approach was conducted to assess the mechanical performance and durability characteristics of the proposed mixtures. The results reveal that the mixture utilizing beach sand achieved the most balanced performance at an optimum bitumen content of 7.35%, with a stability value of 1755.78 kg and an air void (VIM) of 4.15%, fully complying with the 2018 Bina Marga specification. Moreover, the combination of excavation waste and beach sand fillers significantly improved moisture resistance, yielding the highest Index Retained Strength (IRS) of 127.39% and the lowest Cantabro loss of 0.59%. These findings indicate that the synergistic use of excavation waste and beach sand not only enhances mixture performance but also reduces the demand for natural aggregates and mitigates construction waste disposal. In practical terms, this approach supports a more sustainable, resilient pavement design for coastal infrastructure, where material scarcity and chloride exposure are major challenges. Overall, the study highlights the potential of locally available materials such as excavation waste and beach sand to produce HRS-WC mixtures that meet technical performance standards while promoting sustainable, cost-effective, and resource-efficient road construction in coastal regions.
Asbestos in the Construction Industry: A Critical Analysis of Impacts on Health and the Environment Baso, Darwis; Khaer, Miftahul
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.8387

Abstract

Asbestos exposure in the construction sector necessitates mitigation due to its severe health and environmental impacts. This study aims to analyze the effects of asbestos exposure and evaluate effective mitigation and risk management strategies. A Systematic Literature Review (SLR) method was applied to examine empirical studies and policies related to asbestos exposure in construction activities. The findings show that respirable asbestos fibers are the primary cause of chronic lung diseases such as asbestosis, lung cancer, and mesothelioma, which have long latency periods. Workers involved in demolition, cutting, insulation installation, and renovation are at the highest risk, while secondary exposure through contaminated work clothing extends risks to families and surrounding communities. Asbestos waste is persistent, easily dispersed, and capable of contaminating air, soil, and water. Effective mitigation strategies include strict regulations, control technologies, administrative procedures, and worker education, with thermal vitrification identified as a promising waste treatment option. This study recommends longitudinal health research, real-time fiber monitoring technologies, mitigation innovation, and waste management models.
Smart IoT- and AI-Based Average Daily Traffic (ADT) Survey Model for Transportation Planning Limantara, Arthur Daniel; Ramadhani, Irfan; Siswanto, Henri; Setiawan, Budhy
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.7621

Abstract

Accurate and efficient traffic data collection is fundamental for sustainable transportation planning. Traditional methods of Average Daily Traffic (ADT) surveys, such as manual counts or pneumatic tubes, are often labor-intensive, costly, and limited in scalability. This paper proposes an integrated ADT survey model that leverages Internet of Things (IoT) sensors and Artificial Intelligence (AI) algorithms to provide real-time, reliable, and scalable traffic monitoring. Using open traffic datasets from Caltrans PeMS (California Performance Measurement System) and Jakarta Open Data as case studies, we designed and simulated an intelligent ADT framework that combines edge IoT devices, cloud-based big-data processing, and AI-based predictive analytics. The proposed methodology is evaluated through simulation and pilot deployment, demonstrating higher ADT estimation accuracy (95%) than traditional approaches, reduced operational costs, and improved adaptability for multimodal transport systems. This research contributes to smart mobility systems, offering practical solutions for urban planners and policymakers in both developed and developing contexts.

Page 20 of 20 | Total Record : 197

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