Amirkabir University of TechnologyAUT Journal of Civil Engineering2588-28999120250601Integrating Multi-hazard Risk Assessment and Climate Change Projections for Adaptive Water Resource Management: A Case Study of the Ajichai River Basin318570710.22060/ajce.2025.23579.5883ENJafarChabokpourDepartment of Civil Engineering, University of Maragheh, Maragheh, Iran.Journal Article20241003This research develops an in-depth hydrologic risk analysis for the Ajichai River catchment by using the flow series at the Veniar station for the period from 1966 to 2013. A complete methodology was used to analyze the flood and drought risks, as well as the long-term trends and eventual impact of climate change on the flow regime of the river. Annual maximum flow data were fitted using the Generalized Extreme Value distribution and provided a 100-year flood estimate of 224.9 m<sup>3</sup>/s, 95% CI: 177.7-272.1 m<sup>3</sup>/s. A significant decreasing trend in annual mean flow was detected: Sen's slope -0.25 m<sup>3</sup>/s/year, p < 0.01. The low-flow frequency analysis yielded a high value of the coefficient of correlation r = 0.98, which explained the duration and severity relationship of droughts described by the power-law equation S = 0.0012 × D<sup>1.85</sup>. It is evident from the seasonal analysis that during the spring season, 68.7% of the annual maximum flow occurs with an average peak flow of 89.6 m<sup>3</sup>/s. There was a very important shift in the timing of the floods, a 26-day earlier date of annual maximum flows between the 1970s and the 2010s. It quantified the relationship between annual maximum flow and precipitation: Q = 0.0015×P<sup>2.1</sup>, R2 = 0.88, underlining the probable impact of the changes in precipitation on flood risk. In fact, it exposes the complex and dynamic hydrological environment of the Ajichai River basin and signifies a requirement for adaptable water management that concurrently contributes to decreasing flood and drought risks in response to climate change.https://ajce.aut.ac.ir/article_5707_b45c024256f0625350840c2ca5be3269.pdfAmirkabir University of TechnologyAUT Journal of Civil Engineering2588-28999120250601A Bibliometric Review of the Literature on Soil Stabilization Using Nanomaterials1932570810.22060/ajce.2025.23585.5884ENHosseinMola-AbasiDepartment of Civil Engineering, Gonbadekavous University, Gonbadekavous, Iran.Hamid RezaSabaDepartment of Civil Engineering, Tafresh University, Tafresh, Iran.S. MohammadMirhosseiniDepartment of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran.Mohammad EsmaeilSeifDepartment of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran.Journal Article20241006The stabilization of soil is a critical aspect of geotechnical engineering, addressing challenges such as soil strength, durability, and load-bearing capacity. The incorporation of nanomaterials into soil stabilization processes has emerged as a revolutionary approach that leverages the unique properties of nanotechnology to enhance soil performance in a sustainable and efficient manner. This study investigates the bibliometric network landscape of soil stabilization using nanomaterials (SSN), offering a comprehensive review of publication trends, key contributors, and influential works. By analyzing 431 publications retrieved from the Scopus database, the study identified articles (74.7%) as the predominant document type, followed by conference papers (18.6%) and review articles (4.4%), emphasizing the centrality of journal-based research. This analysis reveals exponential growth in research output, with publications surging from 1 in 1999–2001 to 176 in 2020–2022, reflecting the field’s dynamic evolution and increasing global interest. Among the most cited works, Behnood, A.’s 2018 publication in transportation geotechnics had 270 citations, followed by Bahmani, S.H. (2014) with 234 citations, underscoring the impact of these foundational studies. Leading journals include Construction and Building Materials, which ranks first with 32 publications. Wang, W. (China) emerges as the most productive author with 13 publications, followed closely by Gallagher, P.M. (United States) with 12 publications, showcasing the contributions of global researchers, particularly from China, India, and the United States. Current interests and future research can be better understood using this systematic mapping, which visually depicts the evolution of publications over time. The results provide a clear roadmap for further investigation. The diverse range of research contributions underscores the field’s dynamic evolution. However, although the study highlights the global interest in SSN and its potential, a more in-depth critique of the methodological gaps, challenges related to scalability, and practical applications would enhance the conclusions.https://ajce.aut.ac.ir/article_5708_f271601df12faf1b57252bb171704faf.pdfAmirkabir University of TechnologyAUT Journal of Civil Engineering2588-28999120250601The Effect of Recycled Crumb Rubber and Steel Fibers on Durability of Roller-Compacted Concrete Pavement3352571810.22060/ajce.2025.23713.5898ENMortezaMadh KhanDepartment of Civil Engineering, Isfahan University of Technology (IUT), Isfahan, Iran.FarshidHeydariDepartment of Civil Engineering, Isfahan University of Technology (IUT), Isfahan, Iran.Journal Article20241127The low cost, good initial strength, and high execution speed of roller-compacted concrete pavements make them an excellent alternative to conventional pavements in many road construction projects. This concrete can be made with recycled rubber granules instead of natural aggregates to preserve natural aggregate resources and contribute to rubber waste recycling. Recycled steel fibers can also be added to this concrete to improve its mechanical properties. This study investigates the effect of using different amounts of crumb rubber instead of aggregates both alone and in combination with recycled steel fibers on the mechanical properties and durability of roller-compacted concrete in pavements, including freeze-thaw resistance, water penetration, and water absorption. Moreover, the amount and size of rubber crumbs play an important role in the compressive strength of specimens under the freeze-thaw cycles. The designs with higher rubber contents had better compressive strength reduction under the freeze-thaw action, as the designs containing 14% cement and 0, 5, 10, 15, and 20% crumb rubber showed respectively 3.1, 16.8, 12.4, 9.5, and 7.9% strength reduction after 300 freeze-thaw<strong> </strong>cycles. Water absorption and water penetration depth increased in the specimens containing more crumb rubber. Adding recycled steel fibers did not positively impact the durability of specimens, as the designs containing 14% cement and 0, 30, and 45 kg/m<sup>3</sup> of recycled steel fibers showed respectively 3.1, 4.7, and 4.9% strength reduction after 300 freeze-thaw<strong> </strong>cycles. Adding crumb rubber increases water penetration and water absorption. Also, durability parameters improved as cement content increased from 14% to 17%.https://ajce.aut.ac.ir/article_5718_9b8937e4c0bc3336b68545e5ce9a8fe4.pdfAmirkabir University of TechnologyAUT Journal of Civil Engineering2588-28999120250601Studying the Effect of Using Travertine Mine Waste on The Physical-Mechanical Properties of The Two-Component Gypsum-Based Composite5364572810.22060/ajce.2025.23652.5893ENRaminDoostmohammadiDepartment of Mining Engineering, University of Zanjan, Zanjan, Iran.FarhadSamimi NaminDepartment of Mining Engineering, University of Zanjan, Zanjan, Iran.Seyed RezaMousavi QeydariDepartment of Chemical Engineering, University of Zanjan, Zanjan, Iran.ZahraShahbaziDepartment of Mining Engineering, University of Zanjan, Zanjan, Iran.Journal Article20241103Composites derived from gypsum are employed as artificial stone and in the cladding of interior building facades. The integration of mine waste in their production may lower manufacturing expenses, contingent upon the materials achieving satisfactory resistance and physical properties. The main objective of the present study is to assess the feasibility of waste travertine minerals for producing environmentally friendly gypsum-based composites. Gypsum composites with five replacement levels (10%, 20%, 30%, 40%, and 50%) of travertine waste powder, with specific particle size distribution, were prepared instead of gypsum. The physical properties (density, ultrasonic wave velocity, and moisture absorption capacity) and mechanical resistances (flexural and compressive strengths) of these samples were compared to a control sample (pure gypsum composite). The results obtained after 14 days indicate that despite a decreasing trend (%5≈) in density within the 0-50% range, up to 20%, this trend was increasing, demonstrating its effects on flexural strength (%9.1≈) and the reduction in the slopes of the curves of other physical and chemical properties. Based on the mechanical resistances obtained from this study, it can be concluded that up to 20% by mass of travertine mineral waste can be used in gypsum panels without changing their mechanical resistances significantly, with a slight increase in water absorption capacity (10%). Also, compared with the minimum standard values for compressive and flexural strengths (2 MPa), this increase can be extended to 50% by mass.https://ajce.aut.ac.ir/article_5728_c0a093bd8dd204819b41571a0b267fc2.pdfAmirkabir University of TechnologyAUT Journal of Civil Engineering2588-28999120250601Modeling Excavation Chamber of EPB Tunnel Boring Machine by Discrete Element Method6576573610.22060/ajce.2025.23335.5872ENArjmandSheykhiDepartment of Mining Engineering, Engineering Faculty, University of Zanjan, Zanjan, Iran.ArashRefahiDepartment of Mining Engineering, Engineering Faculty, University of Zanjan, Zanjan, Iran.FarhadSamimi NaminDepartment of Mining Engineering, Engineering Faculty, University of Zanjan, Zanjan, Iran.Journal Article20240709Earth Pressure Balance (EPB) tunnel boring machines are widely utilized for the excavation of subway tunnels. These machines leverage the pressure generated by the excavated materials within the excavation chamber to stabilize the tunnel face. The pressure in the excavation chamber is modulated by varying the speed of the screw conveyor, making the precise control of this rotation speed critically important. Such adjustments facilitate the management of the tunnel face and influence the overall settlement of the tunnel structure. This study models the tunnel excavation of Tabriz Metro Line 2, employing an EPB shield that operates under earth pressure conditions. The excavated material is accumulated in a chamber located behind the cutter head, which generates the requisite pressure at the work face. This pressure is regulated through the screw conveyor mechanism. The simulation was conducted using a three-dimensional particle flow code based on the discrete element method. The findings indicate that when the pressure at the face is decreased to 50% of the maximum pressure exerted by the horizontal jacks of the shield drive, significant and hazardous ground surface settlements occur. Conversely, at elevated pressures, a consistent settlement of 1.9 cm was recorded. Additionally, a reduction in the cutter-head rotation speed from 2 rpm resulted in a decline of the work face, while an increase in speed corresponded with the same 1.9 cm settlement. The discrete element method effectively models the drilling process. The validity of the modeling outcomes was corroborated by data acquired from instrumentation.https://ajce.aut.ac.ir/article_5736_4f6cc9270e29d0023ca632c1cacf34f0.pdfAmirkabir University of TechnologyAUT Journal of Civil Engineering2588-28999120250601A Review of The Industrialization of Building Projects With a Focus on The Logistics Phase7796570910.22060/ajce.2025.23730.5899ENSaharTaheripourFaculty of Art & Architecture, Tarbiat Modares University, Tehran, IranMojtabaAziziFaculty of Art & Architecture, Tarbiat Modares University, Tehran, IranMohammad HosseinSobhiehFaculty of Art & Architecture, Tarbiat Modares University, Tehran, IranJournal Article20241205The building industry is of significant interest due to its unique characteristics compared to other industries, including the allocation of substantial capital and resources. However, its productivity rate remains relatively low. One potential way to improve and increase productivity in the building industry is by adopting and implementing more technological solutions, including industrialization. Successful implementation of industrialization requires, in the first instance, an understanding of the process phases involved in industrialized projects. In this regard, the present research conducts a scoping review (2010–2023) of articles published in Web of Science (WoS) and Google Scholar. A total of 181 articles related to the keywords of the research were identified and evaluated. The findings indicate that the life cycle of industrialized projects can be classified into three main phases: off-site construction, logistics, and on-site construction. Focusing on the logistics phase and reviewing the most important research, key management areas for this phase were identified, including scheduling, cost, and space management. Finally, theoretical gaps within the logistics phase were identified, highlighting the lack of attention given to these areas by researchers.https://ajce.aut.ac.ir/article_5709_7639a30c40f35720c6e27cfaf9e67ef6.pdf