Jordan Journal of Civil Engineering (JJCE) is a quarterly peer-reviewed scientific journal covering civil engineering. It was established in 2007 and is published by the Jordan University of Science and Technology. Subjects covered include applications of civil rehabilitations, structural control, smart materials, earthquake engineering, geotechnical engineering and soil/rock mechanics, dam engineering, traffic and transportation engineering, water and environmental engineering, construction management and project planning, surveying and mapping, and infrastructures engineering, urban planning, green architecture as well as numerical and analytical methods.

Jordan Journal of Civil Engineering (JJCE) is a quarterly peer-reviewed scientific journal covering civil engineering. It was established in 2007 and is published by the Jordan University of Science and Technology. Subjects covered include applications of civil rehabilitations, structural control, smart materials, earthquake engineering, geotechnical engineering and soil/rock mechanics, dam engineering, traffic and transportation engineering, water and environmental engineering, construction management and project planning, surveying and mapping, and infrastructures engineering, urban planning, green architecture as well as numerical and analytical methods.

This study investigates the changes in land use/land cover (LULC) and their impact on ecosystem carbon sequestration, greenhouse gas (GHG) dynamics, and environmental sustainability in the Gandak River Basin (GRB), India, focusing on the period between 2014 and 2024.LULC changes significantly influence ecosystem functions, including carbon storage potential, biodiversity, and air quality regulation.Using Google Earth Engine (GEE)-based machine learning (ML) algorithms for LULC classification, the study identified substantial transformations in land cover patterns.In 2014, the basin was predominantly covered by agricultural land, followed by forests, water bodies, and urban areas.By 2024, rapid urbanization and infrastructural expansion caused a corresponding decline in farming and the forested regions.Using the InVEST model, carbon storage estimates revealed a net increase of 23,415,542.10Mg of carbon (C) over the decade, primarily attributed to improved agricultural management, afforestation initiatives, and soil carbon enhancement.However, intensified urban growth and industrialization led to higher emissions of GHGs, including formaldehyde (HCHO), carbon monoxide (CO), nitrogen dioxide (NO), and carbon dioxide (CO), contributing to degraded air quality and increased regional warming potential.Elevated concentrations of these gases were closely linked to forest loss, declining vegetation cover, soil degradation, and growing anthropogenic pressures, highlighting the dual challenge of enhancing carbon sequestration while mitigating environmental risks.This study underscores the importance of integrated and sustainable LULC planning to control emissions, enhance carbon storage, and reduce the basin's vulnerability to climate change.These findings provide critical insights for policymakers to formulate evidence-based strategies that promote eco-friendly development, resource conservation, and climate resilience in the GRB.

This study aimed to explore the potential of utilizing waste nano-barite in enhancing the properties of bitumen and asphalt mixture. The research also examined the effectiveness of waste barite powder as a filler in modifying asphalt mixture behavior. Asphalt mixture samples were prepared through wet mixing with barite modified bitumen and dry mixing with barite filler, followed by testing for Marshall Stability, Cantabro, resilience modulus, and rutting. The findings indicate that the addition of nano-barite to bitumen enhances the properties of bitumen. Furthermore, the performance of asphalt is enhanced by the inclusion of barite in both wet and dry mixing methods, as evidenced by improved Marshall Stability; for example, Marshall Stability in the dry state increases by increasing the barite content to 54.7%. Also, the amount of wear in wet mixing in the amount of 3% filler decreases with increasing barite by about 6%. In addition, the results of statistical analysis show that the improvement of asphalt mixture performance due to the addition of barite in dry, and wet mixing is significant. Utilizing waste nano-barite in bitumen and asphalt mixture improves the performance, sustainability, and energy efficiency. It optimizes raw material usage, reduces environmental impact, and improves cost-effectiveness compared to traditional additives, such as polymers, crumb rubber, or calcium carbonate. Keywords: Nano-waste barite, Asph

Jordan Journal of Civil Engineering (JJCE) is a quarterly peer-reviewed scientific journal covering civil engineering. It was established in 2007 and is published by the Jordan University of Science and Technology. Subjects covered include applications of civil rehabilitations, structural control, smart materials, earthquake engineering, geotechnical engineering and soil/rock mechanics, dam engineering, traffic and transportation engineering, water and environmental engineering, construction management and project planning, surveying and mapping, and infrastructures engineering, urban planning, green architecture as well as numerical and analytical methods.

In the construction industry, health and environmental considerations have been growing.This industry has developed several technologies and a variety of admixtures to reduce the temperature at which asphalt mixtures are manufactured, resulting in a truly innovative type of mix known as warm mix asphalt (WMA).In recent years, warm mix asphalt (WMA) has become an alternative to hot mix asphalt (HMA).Sasobit is a synthetic hard wax that is mixed with bitumen to be used in road construction.Sasobit additive can minimize WMA development temperatures.This study investigates the effect of Sasobit with variation in mixing and compaction temperatures on the properties of warm mixes.The present study is divided into four stages.In stage I, the physical properties of aggregates and bitumen were discussed.In stage II, the optimum binder content for the conventional DBM mix was determined.In stage III, the physical properties of Sasobit modified binder and the effect of Sasobit modified binders on properties of WMA at different mixing temperatures (165, 135, 125, 110 o C) and compaction temperatures (140, 120, 110, 95 o C) were determined.The optimum bitumen contents at all temperature ranges were determined and compared.In stage IV, the durability aspect of standard/control and modified mixes was determined.The moisture susceptibility using the Tensile Strength Ratio (TSR) of all the trial mixes was determined and compared.Based on test results, it has been observed that Sasobit resulted in improved physical properties of bitumen.Sasobit resulted in a reduction in the viscosity of bitumen.2% Sasobit addition showed a reduction in the mixing temperature by 40 and compaction temperature by 30.It will result in a reduction of fuel consumption in the production of bitumen mixes, which ultimately will protect the environment.

The geotechnical properties of soils are often influenced by chemical compounds and mineral additives. This study investigates the effects of varying calcium chloride (CaCl2) contents (0% to 6% by weight of dry soil) on the Atterberg limits and classification of Marley soil (MS), stabilized with 8% lime (L), 20% natural pozzolana (NP), and their combination (8%L+20%NP). The research also examines the impact of curing time (1 and 30 days) on the plasticity index (PI) and soil classification, both with and without CaCl2. In the absence of CaCl2, the addition of L, alone or combined with NP, significantly reduced the PI of stabilized MS and markedly improved its classification, particularly with the L-NP combination over longer curing periods. In contrast, NP alone caused only a slight decrease in the PI. The inclusion of CaCl2 further reduced the PI in the MS‒L and MS‒L-NP mixtures. Notably, the transformation in soil classification was more substantial with L and L-NP than with NP alone. A comparative evaluation of the Unified Soil Classification System (USCS) and the British Soil Classification System (BSCS) revealed that the BSCS offered greater precision in classifying stabilized MS, underscoring its suitability for such applications. These findings highlight the significant benefits of incorporating CaCl2, alone or in combination with L or L-NP, in enhancing the PI and the classification of MS. The improvements in both PI and classification are influenced by several factors, including additive type and amount, CaCl₂ content, curing period, and the classification system employed. Keywords: Marley soil (MS), Mineral additives (L and NP), Calcium chloride (CaCl2), Atterberg limits, USCS and BSCS classification systems, Stabilization.

This study examines the effects of installing stone columns in soft clay using numerical simulations of small-scale laboratory tests. These tests involve reinforcing Kaolin specimens with sand columns constructed using two techniques: simple replacement without compaction and replacement with compaction. After installation, the specimens were subjected to loading to evaluate their mechanical behavior. A parametric study was conducted to assess the influence of key factors, including area replacement ratio, geogrid confinement, column length, and intensity of compaction stress. The results showed that settlement reduction is proportional to the area replacement ratio, column length, and the stiffness of the geogrid encasement. For a 16% area replacement ratio, the relative settlement decreased from 14.6% to 12.1%, with a corresponding stress concentration ratio of 1.92. When geogrid confinement was applied, settlement was further reduced to 6.9% and stress concentration ratio increased to 15.9. Moreover, columns installed with compaction led to a 20% reduction in the void ratio near the column, lowering the settlement to 9.23%. This reduction was directly related to the intensity of the compaction stress applied. The study highlighted the importance of the column installation method on the behavior of reinforced soils. Keywords: Reinforcement,

Jordan Journal of Civil Engineering (JJCE) is a quarterly peer-reviewed scientific journal covering civil engineering. It was established in 2007 and is published by the Jordan University of Science and Technology. Subjects covered include applications of civil rehabilitations, structural control, smart materials, earthquake engineering, geotechnical engineering and soil/rock mechanics, dam engineering, traffic and transportation engineering, water and environmental engineering, construction management and project planning, surveying and mapping, and infrastructures engineering, urban planning, green architecture as well as numerical and analytical methods.

This study investigates the control of compaction quality in earth-rock mixture fillers based on the dynamic deformation modulus (Evd). Discrete element simulations were employed to construct sub-grade models of earth-rock mixture fillers with varying rock contents. During the compaction process, Evd, settlement differences, porosity, and rolling passes were measured. Building on dual control indicators—porosity and settlement difference—a method for the rapid assessment of compaction quality in earth-rock mixture fillers based on Evd was proposed, accompanied by corresponding quality control standards. Field tests were conducted to validate the accuracy of these standards. The results show that, at a rock content of 70%, the settlement difference and porosity are minimized. After 8 rolling passes, the settlement differences for earthrock mixture filler layers with 30%, 50%, and 70% rock contents are all less than 2 mm, with corresponding Evd values exceeding 55 MPa, 57 MPa, and 60 MPa, respectively, thus meeting the compaction quality requirements. The error between the field test results and simulation results is less than 5%. This study introduces an innovative approach to compaction quality control, offering a fast and accurate method for detecting roadbed compaction quality. It significantly enhances the precision of roadbed and filler compaction control, while optimizing quality management throughout the construction process. Additionally, it presents a novel technique for rapid compaction assessment of roadbeds across various soil types. This work provides valuable theoretical support for the standardization of related industries and contributes to the sustainable development of engineering construction. Keywords: Earth-rock mixture filler, Discrete element, Dynamic deformation modulus, Rolling passes, Porosity, Settlement difference.