The Experts below are selected from a list of 17340 Experts worldwide ranked by ideXlab platform
Amiri Ali - One of the best experts on this subject based on the ideXlab platform.
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Embodied emissions of Buildings - A forgotten factor in green Building certificates
'Elsevier BV', 2021Co-Authors: Amiri Ali, Emami Nargessadat, Ottelin Juudit, Sorvari Jaana, Marteinsson Björn, Heinonen Jukka, Junnila SeppoAbstract:Funding Information: This Research was funded by the Ministry of the Environment of Finland, CarbonSinkCity grant (310283). The views expressed by the authors do not necessarily reflect those of the funder. Publisher Copyright: © 2021 The Author(s) Copyright: Copyright 2021 Elsevier B.V., All rights reserved.The construction and use of Buildings consume a significant proportion of global energy and natural resources. Leadership in Energy and Environmental Design (LEED) is arguably the most international green Building certification system and attempts to take actions to limit energy use of Buildings and construct them sustainably. While there has been a wide range of Research mainly focused on energy use and emission production during the operation phase of LEED-certified Buildings, Research on embodied emissions is rare. The aim of this study is to evaluate the efficiency of LEED regarding initial (pre-use) embodied emissions using life cycle assessment (LCA). The study comprised several steps using a designed model. In the first step, three optional Building material scenarios were defined (optimized concrete, hybrid concrete-wood, and wooden Buildings) in addition to the base case concrete Building located in Iceland. Second, an LCA was conducted for each scenario. Finally, the number of LEED points and the level of LEED certification was assessed for all studied scenarios. In addition, a comparison regarding embodied emissions consideration between LEED and Building Research Establishment Environmental Assessment Method (BREEAM) as mostly used green certificate was conducted in the discussion section. The LCA showed the lowest environmental impact for the wooden Building followed by the hybrid concrete-wood Building. In the LEED framework, wooden and hybrid scenarios obtained 14 and 8 points that were related to material selection. Among these points, only 3 (out of a total of 110 available points) were directly accredited to embodied emissions. The study recommends that the green Building certificates increase the weight of sustainable construction materials since the significance of embodied emissions is substantially growing along with the current carbon neutrality goals. As most of the materials for Building construction are imported into Iceland, this study is useful for locations similar to Iceland, while overall it is beneficial for the whole world regarding climate change mitigation.Peer reviewe
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Embodied emissions of Buildings - A forgotten factor in green Building certificates
'Elsevier BV', 2021Co-Authors: Amiri Ali, Emami Nargessadat, Ottelin Juudit, Sorvari Jaana, Marteinsson Björn, Heinonen Jukka, Junnila SeppoAbstract:Highlights • The pre-use stage (construction) emissions of Buildings occur in a short time. • Wooden Buildings seem to emit less compared to concrete ones in pre-use stage according to LCA. • Green Building certificates need to consider embodied emissions more exhaustively.The construction and use of Buildings consume a significant proportion of global energy and natural resources. Leadership in Energy and Environmental Design (LEED) is arguably the most international green Building certification system and attempts to take actions to limit energy use of Buildings and construct them sustainably. While there has been a wide range of Research mainly focused on energy use and emission production during the operation phase of LEED-certified Buildings, Research on embodied emissions is rare. The aim of this study is to evaluate the efficiency of LEED regarding initial (pre-use) embodied emissions using life cycle assessment (LCA). The study comprised several steps using a designed model. In the first step, three optional Building material scenarios were defined (optimized concrete, hybrid concrete-wood, and wooden Buildings) in addition to the base case concrete Building located in Iceland. Second, an LCA was conducted for each scenario. Finally, the number of LEED points and the level of LEED certification was assessed for all studied scenarios. In addition, a comparison regarding embodied emissions consideration between LEED and Building Research Establishment Environmental Assessment Method (BREEAM) as mostly used green certificate was conducted in the discussion section. The LCA showed the lowest environmental impact for the wooden Building followed by the hybrid concrete-wood Building. In the LEED framework, wooden and hybrid scenarios obtained 14 and 8 points that were related to material selection. Among these points, only 3 (out of a total of 110 available points) were directly accredited to embodied emissions. The study recommends that the green Building certificates increase the weight of sustainable construction materials since the significance of embodied emissions is substantially growing along with the current carbon neutrality goals. As most of the materials for Building construction are imported into Iceland, this study is useful for locations similar to Iceland, while overall it is beneficial for the whole world regarding climate change mitigation
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How green Building certificates fulfill the environmental goals in the Buildings’ life cycle
'MDPI AG', 2021Co-Authors: Amiri AliAbstract:11.11.2021 16:00 – 20:00 Online via Zoom; https://aalto.zoom.us/j/61442852203While Buildings are responsible for the consumption of nearly 40% of the total energy usage anda large amount of material, they are considered as one of the potential solutions for climate change mitigation. The emissions caused by energy and material use are produced during the life cycle of Buildings including pre-use and use stages as the main ones followed by end of life (EoL) stage.The consideration of sustainability and the concern regarding limited natural resources has brought about in the preparation of green Building certificates during the last three decades. Among different green Building certificates, Building Research Establishment Environmental Assessment Method (BREEAM) is the most widely used while Leadership in Energy and Environmental Design (LEED) is most internationally adopted. This dissertation is going to evaluate green Building certificates regarding their fulfillment of reduction in energy and material use via LEED as a reference. Two main stages of pre-use and use are considered while the EoL stage is ignored because of its low contribution. The dissertation is based on four journal articles, and a mixture of qualitative and quantitative methods including literature review, case studies, and statistical data analysis has been used. It was found that, in the use stage, green Building certificates have fulfilled the goal of decreasing energy use and emission cut especially at higher levels of certificates but at lower levels the decline in energy consumption is questionable. Regarding the pre-use stage, green Building certificates have poorly allocated the points to the materials that have lower environmental impacts like wood.The scenarios of different material selection confirm the lower environmental impacts of wooden Buildings based on life-cycle assessment (LCA) as a sustainability evaluation method meaning that it is noteworthy to put more emphasis on material selection in green Building certificates. Wooden Buildings construction as a recommended solution not only yield fewer emissions during their production compared to concrete and steel ones but also have a significant potential of storing carbon. The study shows that the future environmental plans and regulations by policymakers need continuous updates and modifications in order to find the best solution for climate change mitigation in different locations and times, this applies to green Building certificates as well. While the body of Research in green Buildings has mainly focused on the use stage, there needs to be more attention on the pre-use stage. Besides the motivation for the production of future energy from renewable and clean sources, the embodied emissions which occur in a short time play a significant role in climate change mitigation.
G.j. Osborne - One of the best experts on this subject based on the ideXlab platform.
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DURABILITY OF PORTLAND BLAST-FURNACE SLAG CEMENT CONCRETE
Cement & Concrete Composites, 1999Co-Authors: G.j. OsborneAbstract:Abstract This paper summarizes the results of studies carried out at the Building Research Establishment in the UK, on the performance and long-term durability of concrete where ground glassy blast-furnace slag (granulated and pelletized) has been used as a cementitious material. Using data from tests on site structures and laboratory and exposure site studies, comparisons are made of the properties and performances of the slag cement concretes with normal Portland cement concretes of similar mixture proportions. A number of recommendations are given for the effective use of ground glassy blast-furnace slag in concrete. The many technical benefits available to the concrete user, such as reduced heat evolution, lower permeability and higher strength at later ages, decreased chloride ion penetration, increased resistance to sulfate attack and alkali silica reaction were affirmed. However, a cautionary warning of the importance of good early curing is made to ensure that the adverse effects of higher rates of carbonation, surface scaling and frost attack are minimized. The paper is intended to provide guidance for those concerned with the design, specification, application and performance of concrete in practice where slag can also help to reduce costs and energy demands in the production of cement compared with normal Portland cement.
W L Lee - One of the best experts on this subject based on the ideXlab platform.
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benchmarking energy use assessment of hk beam breeam and leed
Building and Environment, 2008Co-Authors: W L LeeAbstract:The Hong Kong Building Environmental Assessment Method (HK-BEAM), Building Research Establishment Environmental Assessment Method (BREEAM) and LEED were formally launched in the 1990's. How well the certified and rated Buildings compare with each other of an interest to Building designers and policy makers. This paper describes how the baseline Buildings, performance criteria and the credit scales of the three schemes compare with each other. By statistical analysis of the energy assessment results of 60 HK-BEAM certified Buildings and the available data for BREEAM and LEED, it seeks to ascertained of Buildings scoring excellent energy performance under different schemes belong to the top 5% in the market. Through this exercise, a systematic approach to benchmark the energy assessments across schemes has been established. With people nowadays paying greater attention to the environmental issues and the rapid development of the environmental schemes in various parts of the world, this study forms a good basis for future benchmarking of energy assessment schemes across nations.
Yuri Gong - One of the best experts on this subject based on the ideXlab platform.
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integrated Building life cycle assessment model to support south korea s green Building certification system g seed
Renewable & Sustainable Energy Reviews, 2017Co-Authors: Yuri GongAbstract:In the construction industry, concerted efforts are being made to quantitatively evaluate the environmental impacts of Building materials and Buildings using the life cycle assessment (LCA) approach. However, the existing Building LCA model applies different evaluation systems and standards to Building materials and Buildings; thus, interlinking and integrating their evaluated values are made difficult. To overcome this problem, this study aims to develop an integrated Building LCA model that enables the integration of all LCA results related to Building materials used for constructing a Building, the Building components, and the whole Building. First, the Building LCA methods and certification criteria employed by major green Building certification systems [Leadership in Energy & Environmental Design (LEED), Comprehensive Assessment System for Built Environment Efficiency (CASBEE), Building Research Establishment Environmental Assessment Methodology (BREEAM), and Green Standard for Energy and Environmental Design (G-SEED)] were analyzed. Then, an integrated Building LCA model that allows integration of the LCA results for Building materials into those of the LCA of Building components and the whole Building was developed. Finally, we established an application plan for a stepwise application of the integrated Building LCA model to G-SEED, a Korean green Building certification system. The feasibility of the integrated Building LCA model was confirmed by comparing it with the existing Building LCA model in a case analysis, which demonstrated the applicability of the proposed integrated Building LCA method in terms of Building materials, Building components, and whole Building.
Rolf Andre Bohne - One of the best experts on this subject based on the ideXlab platform.
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an analysis of the most adopted rating systems for assessing the environmental impact of Buildings
Sustainability, 2017Co-Authors: Elena Bernardi, Salvatore Carlucci, Cristina Cornaro, Rolf Andre BohneAbstract:Rating systems for assessing the environmental impact of Buildings are technical instruments that aim to evaluate the environmental impact of Buildings and construction projects. In some cases, these rating systems can also cover urban-scale projects, community projects, and infrastructures. These schemes are designed to assist project management in making the projects more sustainable by providing frameworks with precise criteria for assessing the various aspects of a Building’s environmental impact. Given the growing interest in sustainable development worldwide, many rating systems for assessing the environmental impact of Buildings have been established in recent years, each one with its peculiarities and fields of applicability. The present work is motivated by an interest in emphasizing such differences to better understand these rating systems and extract the main implications to Building design. It also attempts to summarize in a user-friendly form the vast and fragmented assortment of information that is available today. The analysis focuses on the six main rating systems: the Building Research Establishment Environmental Assessment Methodology (BREEAM), the Comprehensive Assessment System for Built Environment Efficiency (CASBEE), the Deutsche Gesellschaft fur Nachhaltiges Bauen (DGNB), the Haute Qualite Environnementale (HQETM), the Leadership in Energy and Environmental Design (LEED), and the Sustainable Building Tool (SBTool).
