Papers by Keyword: Infrastructure

Abstract: This paper evaluates the feasibility of hydrogen production targets within Nigeria’s Energy Transition Plan (ETP), considering the country’s abundant renewable energy resources, evolving policy environment, and significant infrastructural and financial hurdles. Using a comprehensive review of global and national energy strategies, cost estimates, and technical potentials, the study compares Nigeria’s current hydrogen development status to international benchmarks. Key findings show that although Nigeria has substantial solar, wind, and hydropower potential, along with vast natural gas reserves for green and blue hydrogen, the lack of a detailed national hydrogen policy with clear, measurable targets remains a major obstacle. Additionally, hydrogen technologies’ high capital and operational costs, combined with an overall funding gap in the broader energy transition, call for strong policy frameworks, strategic infrastructure development, and focused human capital investment. The paper concludes with recommendations for a phased, integrated strategy to unlock Nigeria’s hydrogen economy. It highlights the importance of policy clarity, risk reduction in investments, and building local capacity to meet its net-zero goals by 2060.

Abstract: The largest contribution to air pollution comes from the transportation sector, especially motorcycles which reach up to 60%. This is an important issue. An effort chosen by the Indonesian government to realize the emission reduction target is by transitioning conventional motorcycles to electric motorcycles. The use of electric vehicles releases lower emissions than conventional vehicles that use fossil fuels. The trend of electric motorcycles adoption in adoption innovation and early adoption is being carried out in Indonesia. Thus, it is necessary to examine the factors that influence the adoption of electric motorcycles in Indonesia with various variable development models. In this study, the influence of mobility behavior, knowledge of electric motorcycles, availability of charging stations, battery replacement costs, and energy charging costs was observed on the selection of hybrid motorcycles, electric motorcycles with batteries, and electric motorcycles battery rental systems using a multinomial logit model. The research found the most chosen motorcycles is an electric motorcycles with a battery.

Abstract: Stainless steel may be susceptible to localized corrosion. Despite this fact, still too many infrastructures are planned with an inadeguate metal chemical composition or placed in wrong environments. In most cases, a clear underestimation of these factors affects the stainless steel durability. These unexpected issues cause a significant technical and economical impact. In this work, several case studies of Inox exposed to unfavorable environmental conditions are presented. A wide range of structures, such as house handles, a swimming pool, a parapet, an industry plant and a waste water collection tank are investigated with respect to the corrosion behavior. Temperature and humidity cyclic variation, promote the enrichments of aggressive agents and lead to degradation. A too low Molybdenum content of the steels is inadequate for some type of structures and service conditions. The weldability changes depending on the steel type and along the thermally affected zones, intergranular corrosion may appear. In addition, a galvanic contact of the stainless steel with existing low alloyed steels components promotes the deterioration of the latter.

Abstract: Quality of Infrastructure became indispensable to the innovation-driven development. Poor infrastructure quality means more extra costs for operation and maintenance, in addition to un-studied impacts on the surrounding environment and society. To eliminate the bad impacts and the extra costs, sustainability must be applied in all infrastructure projects. Sustainability represents one of the latest degree subjects that have various trials to connect the social science with the engineering and the environmental science with the future technology. The objective of this research is to provide an integrated sustainable evaluation system (ISES) for quantifying all impacts of road projects. The proposed evaluation system took into consideration the different phases of project including construction phase and operational phase. The different impacts of road projects were divided into three main classifications; the project economic costs to include costs of project construction and operation; the environmental impacts; and the social impacts. Furthermore, a real case study was discussed to validate the research methodology, where it was concluded that the environmental and social impacts have the main impact on project decision and according to the ISES value, the case study road has a sustainable impact on the surrounding environment and society.

Abstract: The interests focus on the tools, used in the case of evaluating the sustainability in the mobility structures. In the present is sustainable development regular part of planning in every scale. According to growing development and innovations, it was necessary to ensure a sustainable framework of progress or traffic performance. Sustainable development goals were founded as a reaction to limited natural sources and also as a response to the human impact on nature. Evolution of those goals started with the environmental base and then had also been added social and economic aspects. A study wants to find sophisticated tools for the evaluation of sustainable development in urban structures. As was located, in Europe exist methods for assessment of sustainability (EIA, SEA, LCA, EF, ER, GP, CBA, CEA, MCDA, EA, SIA, SEIA, etc.). Although even their large amount, they are mostly based on just one section of SD. Other tools which are used, are methods for evaluation sustainability (BREEAM, CASBEE-UD, GBI, LEED, IGBC, SB tool, DGNB, etc.), where are also included other sections (environmental, economic, social). Assessment tools were described and preliminary compared in the context of the factors’ coverage.

Abstract: This work presents some relevant data of the last period for the transport and logistics market from Romania. The Romanian transportation and logistics market is currently estimated at the value of over 30 billion lei (approximately 6.7 billion euros), with the biggest 20 players having a market share of almost 20%. The most concentrated area for the storage of the transported goods is in Bucharest, the capital city and around some cities like Timisoara, Cluj, Ploiesti, Brasov and Pitesti. There are also other cities like Oradea, Sibiu and Arad, that are on full expanding process.

Abstract: This paper reports an experimental study on the use of waste plastics in stone mastic asphalt (SMA) for infrastructural applications (e.g. roads, carparks and underground construction). The binders investigated were conventional bitumen, target bitumen (polymer modified bitumen) and waste plastics (recycled low-density polyethylene LDPE of 5 wt% and 10 wt% blends). The properties of bitumen were assessed based on its penetration value and softening point; while the performance of asphalt premix (or asphalt mixture) was evaluated based on its Marshall stability, flow and quotient. The asphalt mixture incorporating waste plastics (10 wt% LDPE blend) as polymer modifier could be a promising material for use in SMA for infrastructural applications.

Abstract: This paper uses the Analytic Hierarchy Process to optimize the PESTEL analysis. The scenario: pre-construction and assembly factors of huge civil engineering construction projects. Several managers use too many criteria to evaluate large projects. It suggests that there may be few important criteria that summarize the manager's preference. To demonstrate the feasibility of the proposed hypothesis, the authors prepared a qualitative and exploratory study. Conclusions are based on the judgment of an expert interviewed. As expected, the hypothesis was considered plausible. Two main criteria corresponded to 71% of the expert's preference. The result resembles a Pareto distribution.

Abstract: Robotics and automation are playing very imperative role in the modern construction practice to meet the challenges and expectation specifically in the infrastructural projects. Automation is a tool for operating or controlling different stages of construction process using mechanized and electronic devices or control systems to reduce the human intervention to a minimum. The design and implementation of these automation technologies has shown progressive outcomes compared to conventional methods. Moreover, considerable improvement in working condition, reduction in accidents and significant increase in production have been evidently observed in the recent construction projects as well as in the earlier research studies. Although several countries have adopted automation in their construction projects, application of these techniques in India is limited to a greater extent due to lack of proper guidelines and specifications. It is important to develop appropriate standards and guidelines for Indian construction sector. This paper reviews different automation techniques that are currently used in many parts of the world and suggestions for their application in the Indian construction scenario are discussed in detail. Moreover, guidelines for efficient design and implementation of automation techniques in India are highlighted in this paper.

Abstract: . The need for rehabilitation of reinforced concrete structures is rapidly increasing. Fibre reinforced polymer (FRP) composite materials for concrete structures have high strength-to-weight ratios that can provide high prestressing forces while adding minimal additional weight to a structure. They also have good fatigue properties and exhibit low relaxation losses, both of which can increase the service lives and the load carrying capacities of reinforced concrete structures. Carbon fiber reinforced polymer (CFRP) composite system is integrated system based on carbon fibres and epoxy resins. By prestressing the CFRP laminates, the material is used more efficiently as a part of its tensile capacity is utilised and it contributes to the load bearing capacity under both service and ultimate load condition. This is an ideal technique as it combines the advantage of using noncorrosive and lightweight advanced composite material in the form of FRP laminates with high efficiency offered by external prestressing. An innovative mechanical anchorage system was developed to prestress the FRP laminates directly by jacking and reacting against the RCC structure.This paper describes the use of Prestressed CFRP laminates for strengthening of RCC structures including practical applications on slabs and bridges. Also it elucidates the post strengthening testing carried out for the validation of this technique.