Studies on Environmental Impact Assessment of Reinforced Concrete in Different Life Cycle Phases

Santoro, Jair Frederico; Kripka, Moacir

doi:10.3844/sgamrsp.2017.32.40

Cited by 8 publications

(7 citation statements)

References 21 publications

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“…Given this scenario, several studies have aimed at minimizing CO2 emissions for several civil construction structures, such as Arpini et al [9], Santoro and Kripka [10], and Tormen et al [11]. However, research analyzing CO2 emissions in prestressed composite steel-concrete beams are yet to be found.…”

Section: Of 17mentioning

confidence: 99%

“…Research has employed several methodologies to measure the environmental impact of buildings, among them, the life cycle assessment (LCA), a method that studies environmental inputs and outputs related to a product or their service lifecycle -i.e., since its production until the end of its service life (Khasreen, Banfill and Menzies [12]). CO2 emission constitutes a common parameter to evaluate this impact on the structural optimization of various structures, as per Payá-Zaforteza et al [13], García-Segura and Yepes [14], and Santoro and Kripka [10].…”

Section: Of 17mentioning

confidence: 99%

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Optimizing the CO2 emission of composite steel‐concrete beams with external prestressing

Fiorotti¹,

Calenzani²,

Alves³

2023

Preprint

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The literature has well established prestressing in concrete beams and its calculation procedures. However, its use in composite steel-concrete beams has increased despite main normative codes lacking a specific approach for it. Designers must, in most cases, combine the available criteria to calculate the standards of steel and reinforced concrete structures. This study aimed to formulate this optimization problem and analyze CO2 emissions for the optimal design of composite steel-concrete beams with external prestressing. The design variables for the optimization problem include cross-section of laminated or welded profiles, slab height, characteristic strength of concrete to compression, and number of tendons. We obtained a solution for the optimization problem via a genetic algorithm (GA) and a particle swarm optimization one (PSO). Comparative analysis with experimental example and with optimization problem of prestressed steel beam are performed. An parametric analysis to several spams is performed, which enabled to evaluate the factors that most impact CO2 emissions. According to results, the chosen algorithms effectively obtained solutions for the problem, and PSO usually provided better results than GA. Regarding the final solution composition, steel contributes the most to emissions, welded profiles provided better solutions than laminated ones, and laminated spans of up to 17.5m and welded ones up to 27.5m dispensed with tendons.

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Section: Of 17mentioning

confidence: 99%

Section: Of 17mentioning

confidence: 99%

Optimizing the CO2 emission of composite steel‐concrete beams with external prestressing

Fiorotti¹,

Calenzani²,

Alves³

2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The assessment of life cycle impacts, the next stage of LCA, is conducted using various methodologies. Several methods and their respective databases are available from various countries, which can generate differences between analyses and make comparison of different LCAs difficult [22][23][24][25]. The last phase of LCA is interpretation, which deals with the summarization of results seeking conclusions, recommendations and decision-making, and provision of results consistent with the defined objectives and scope.…”

Section: Life Cycle Assessment and Life Cycle Costingmentioning

confidence: 99%

Study of Alternatives for the Design of Sustainable Low-Income Housing in Brazil

et al. 2021

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Despite insufficient housing facilities, particularly in developing countries, construction systems are generally selected intuitively or based on conventional solutions sanctioned by practice. The present study aims to evaluate different options for the design of low-income housing in Brazil by integrating the life cycle assessment (LCA) into the decision-making process. To achieve this objective, three single-family projects with different construction systems were selected and analyzed. The most sustainable design was selected through the analytic hierarchy process (AHP). The considered parameters, which were obtained through a survey with professionals and customers, included cost, environmental impact, thermal comfort, construction time, and cultural acceptance. LCA and life cycle cost assessment (LCCA) were performed with the frontier’s system considering the cradle-to-gate cycle, which included the extraction of raw materials, manufacture of building materials, and housing construction. The projects were modelled using Autodesk Revit software with the Tally application for LCA evaluation. The results indicated that light steel frame houses present a better behavior than other conventional alternatives, and the integration of building information modelling with LCA and LCCA in the design phase can lead to the development of more sustainable houses.

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“…It can be noticed that the precast concrete bridge generates, by far, the most major impacts when compared to the other alternatives. This is because cement (and more precisely, the clinker) is among the list of materials that decisively contribute to the total emissions [34]. On the other hand, a timber bridge, although consuming a large quantity of water and needing chemical treatments to improve its durability, is still a more environmentally friendly option than concrete.…”

Section: Environmental Impactmentioning

confidence: 99%

Selection of Sustainable Short-Span Bridge Design in Brazil

2019

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Owing to the elevated cost of bridges, especially when compared to the cost of roads, their rational design and material selection are fundamental properties to consider when aiming to reduce the environmental impacts and lengthen the lifespan of the bridge. Especially in developing countries, the construction of new bridges (mainly short spanned) is still a necessity, and it is important that these new structures are designed according to all the sustainability parameters, instead of being based only on the construction cost. Thus, the present work aims to study short-span bridges by integrating environmental assessments into the decision-making process. To achieve this goal, three short-span bridge designs, proposed by public organizations in Brazil, are evaluated: Precast concrete bridge, mixed concrete/steel bridge, and timber bridge. In order to allow comparison, the same location and span are considered. The structures are evaluated considering the following quantitative aspects: Cost of construction, assembly and material transportation, lifespan, and environmental impact (measured by the global warming potential, GWP). In addition, some more subjective factors are considered, such as the architecture (layout and appearance) and the user’s sensation of security. The selection is made by the adoption of two multi-criteria decision-making methods (analytic hierarchy process or AHP and Vikor). The results obtained with both methods indicate the mixed concrete/steel bridge as the most adequate alternative. Some additional analysis is performed in order to evaluate the influence of the qualitative aspects, as well as to study the importance of the variations in the costs on the results.

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Studies on Environmental Impact Assessment of Reinforced Concrete in Different Life Cycle Phases

Cited by 8 publications

References 21 publications

Optimizing the CO2 emission of composite steel‐concrete beams with external prestressing

Optimizing the CO2 emission of composite steel‐concrete beams with external prestressing

Study of Alternatives for the Design of Sustainable Low-Income Housing in Brazil

Selection of Sustainable Short-Span Bridge Design in Brazil

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