CO2 Emission Analysis of Light Aggregate Concrete Block in China

2017 ◽  
Vol 898 ◽  
pp. 1963-1969 ◽  
Author(s):  
Yan Qiong Sun ◽  
Yu Liu ◽  
Su Ping Cui
Keyword(s):  
Life Cycle ◽  
Building Materials ◽  
Ghg Emissions ◽  
Concrete Block ◽  
Emission Analysis ◽  
Cement Production ◽  
Aggregate Concrete ◽  
Concrete Blocks ◽  
Cradle To Gate ◽  
Whole Life Cycle

The development and application of light aggregate concrete blocks are considered as one of the key issue that promote the energy saving and emission reduction in construction and building materials industries. In this paper, the greenhouse gas (GHG) emissions of light aggregate concrete blocks during the whole life cycle were analyzed based on life cycle assessment (LCA) methodology. The results demonstrated that the amount of GHG emissions of the light aggregate concrete block was 174 kg/m3 in the system boundary of ‘from cradle to gate’. The direct GHG emissions was 51.31 kg/m3 accounting for 28.46% of the aggregate emission, while the indirect GHG emissions was 124 kg/m3. The cement production and the concrete block production were the main contributors to the total emissions. According to the sensitivity analysis, the GHG emissions amount was quite sensitive to the amount of cement and ceramsite consumption.

Comparative Life Cycle Assessment of Autoclaved Concrete Blocks and Fired Blocks in China

2018 ◽  
Vol 913 ◽  
pp. 1018-1026
Author(s):  
Yan Qiong Sun ◽  
Yu Liu ◽  
Su Ping Cui
Keyword(s):  
Sensitivity Analysis ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Energy Consumption ◽  
Data Quality ◽  
Human Health ◽  
Functional Unit ◽  
Cement Production ◽  
Terrestrial Ecotoxicity ◽  
Concrete Blocks

In this paper, a variety of blocks were grouped into the autoclaved blocks and fired blocks as far as the productive technology is concerned. In order to compare the life cycle impacts of the two kinds of the blocks, a life cycle assessment of two products on the functional unit 1m3 was carried out through the exploitation of mineral stage, transportation stage and the production of the blocks stage on the considering of the resource and energy consumption and the pollutant discharges. The results demonstrated that the fired blocks appeared to have less impact than autoclaved concrete blocks on human health, marine ecotoxicity toxicity and terrestrial ecotoxicity toxicity nearly 30%. The raw coal led to the serious impacts on the fossil depletion through the cement production stage of the autoclaved concrete blocks accounting for 45.86% and the gangue exploitation stage of the fired blocks accounting for 42.5%. Assessment of the data quality that the data was of pretty high or within the permission. The sensitivity analysis and contribution analysis assessment showed that the conclusion were robust.

scholarly journals GHG emissions in KG-CO2 / M2 generated by a House Type INFONAVIT

2019 ◽  
pp. 10-23
Author(s):  
Humberto Aceves-Gutierrez ◽  
Oscar López-Chávez ◽  
Santa Magdalena Mercado-Ibarra ◽  
Cesar Alejandro Contreras-Quintanar
Keyword(s):  
Climate Change ◽  
Life Cycle ◽  
Urban Growth ◽  
Greenhouse Effect ◽  
Human Population ◽  
Building Materials ◽  
Ghg Emissions ◽  
Iso 14040 ◽  
Fundamental Factor ◽  
The Earth

Climate change is one of the main current problems, it concerns the entire human population since its effects are worldwide, especially now we have seen its consequences, according to Menghi (2007), the average global temperatures grew by more than 0.5 ° C in the last century, and the glaciers are disappearing from the earth. The greenhouse effect generated mainly by the gases of the same name (GHG), is the fundamental factor of climate change. Construction is one of the ways in which the human being contaminates in a constant way this due to urban growth and the demand for infrastructure that this generates. This research has the purpose of determining the KG-CO2 / M2 generated by a 44 m2 house of interest type INFONAVIT using the Life Cycle methodology (ACV) of the products or materials, established in ISO 14040, employee an inventory of KG-CO2 emissions from building materials, obtained from various bibliographic sources and databases and using the work volumes required to build the house. The results obtained of 161.57 Kg-CO2 / M2.

Optimization design of building isolation structure based on sustainable benefit analysis

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jia Wu
Keyword(s):  
Life Cycle ◽  
Optimization Model ◽  
Optimization Design ◽  
Large Scale ◽  
Building Materials ◽  
Cost Ratio ◽  
Benefit Analysis ◽  
Seismic Capacity ◽  
Content Type ◽  
Whole Life Cycle

PurposeThe study shows that with the progress of building technologies and building materials, the scale of buildings has increased. But in earthquake-prone areas, large-scale buildings mean higher risks; therefore improving the seismic capacity of buildings is an important measure to reduce the risk of buildings.Design/methodology/approachIn this study, the isolation structure of buildings was introduced briefly, and the cost-benefit based optimization model of the isolation structure was constructed. The optimization of the isolation structure was carried out from the perspective of benefit analysis. Then, two buildings with the same structure were analyzed as examples. One kept the original isolation structure, and the other optimized the isolation structure with the optimization model.FindingsThe final results showed that the optimized isolation structure had a lower input cost ratio, i.e. it had a higher benefit in the same whole life cycle, and the expected loss cost of the structure produced in the same life cycle was lower.Originality/valueIn conclusion, the optimization model of the isolated structure based on benefit analysis can effectively improve the benefit of building isolation structure produced in the whole life cycle.

The Application of the Life-Cycle Assessment in the Building Sector: An Italian Case Study

2017 ◽  
Vol 1 (1) ◽  
pp. 91-108
Author(s):  
Maurizio Cellura ◽  
Francesco Guarino ◽  
Sonia Longo
Keyword(s):  
Life Cycle Assessment ◽  
Life Cycle ◽  
Environmental Impacts ◽  
Building Materials ◽  
Life Cycle Thinking ◽  
Single Family ◽  
Building Sector ◽  
Life Cycle Assessment Methodology ◽  
Use Of Resources ◽  
Whole Life Cycle

The building sector is one of the most relevant in terms of generation of wealth and occupation, but it is also responsible for significant consumption of natural resources and the generation of environmental impacts, mainly greenhouse gas emissions. In order to improve the eco profile of buildings during their life-cycle, the reduction of the use of resources and the minimization of environmental impacts have become, in the last years, some of the main objectives to achieve in the design of sustainable buildings. The application of the life-cycle thinking approach, looking at the whole life cycle of buildings, is of paramount importance for a real decarbonization and reduction of the environmental impacts of the building sector. This paper presents an application of the life-cycle assessment methodology for assessing the energy and environmental life-cycle impacts of a single-family house located in the Mediterranean area in order to identify the building components and life-cycle steps that are responsible of the higher burdens. The assessment showed that the largest impacts are located in the use stage; energy for heating is significant but not dominant, while the contribution of electricity utilized for households and other equipment resulted very relevant. High environmental impacts are also due to manufacture and transport of building materials and components.

scholarly journals Life Cycle Assessment of Ethiopian Cement Manufacturing: A Potential Improvement on the Use of Fossil Fuel in Mugher Cement Factory

2021 ◽  
pp. 100-112
Author(s):  
Lemma Beressa ◽  
Battula Vijaya Saradhi
Keyword(s):  
Life Cycle ◽  
Portland Cement ◽  
Impact Assessment ◽  
Life Cycle Impact Assessment ◽  
Fossil Fuels ◽  
Energy Use ◽  
Fossil Fuel ◽  
Ghg Emissions ◽  
Energy Sources ◽  
Cement Production

The use of imported fuel in the Ethiopian cement industry increased the cost of production and the environmental burden, necessitating intervention. The greenhouse gas (GHG) emission, energy usage intensity, and resource exploitation of Ethiopian cement production were evaluated using the life cycle impact assessment (LCA) tool, aiming to recommend improvements. The LCA study used cumulative energy demand (CED) and Intergovernmental Panel on Climate Change (IPCC) 2006 life cycle impact assessment (LCIA) methods. For the case study of Mugher cement factory (MCF), the results on energy use intensities showed 3.74, 3.67, and 2.64 GJ/ton of clinker, Ordinary Portland cement (OPC), Pozzolana Portland cement (PPC), respectively. The result revealed MCF's energy use intensity was within the global range of 3.32 to 5.11 GJ/ton of cement production using similar kiln technology. The results on the GHG emissions were 0.87, 0.84, and 0.59 tons of CO2-equivalent/ton of clinker, OPC, and PPC, respectively. Process emissions accounted for 60% of overall CO2 emissions, with energy-related emissions accounting for the remaining 40%. CO2 emissions of MCF are below the global limit of 0.9 tons/ton of clinker, where all energy sources are fossil fuels. However, it is higher than the 0.65 ton/ton of clinker from a moderate rotary kiln in China. MCF used 70% of its total energy sources from imported fossil fuels, and transportation of the imported fuel added 1.2% CO2 to total emissions. A suggested fossil fuel use improvement scenario for MCF, where coffee husk replaces 50% of the imported coal improved the energy intensity, GHG emissions, and total cost of coal in clinker production by 1.2%, 14%, 36%, respectively.

scholarly journals Assessment of Strength of Hollow Concrete Blocks with Holes Reinforced with Half Portion of Coconut Shells

2018 ◽  
Vol 6 (2) ◽  
pp. 93-98
Author(s):  
Anu S Das ◽  
Ansu V ◽  
Megha P ◽  
Nithin M Thomas ◽  
Sachin A K
Keyword(s):  
Building Materials ◽  
Convex Surface ◽  
Agricultural Waste ◽  
Concrete Block ◽  
Waste Products ◽  
Arch Action ◽  
Concrete Blocks ◽  
Natural Aggregates ◽  
Natural Building ◽  
Coconut Shells

Natural building materials are diminishing day by day. Hence economical alternatives of natural building materials are necessary for sustainable development. Hollow concrete block was developed to reduce the use of natural building materials. Agricultural waste products like coconut shells from coconut industry have disposal problems causing environmental concerns. Various studies were done in the past, replacing a portion of the natural aggregates with broken coconut shells for manufacturing the hollow concrete blocks. In this study, we have developed a new method of forming the holes of hollow concrete blocks by placing stacks of half portion of coconut shells at the bottom with convex surface upwards to reinforce the holes by arch action. The results show that the coconut shell reinforced hollow concrete blocks have better strength as compared to open-graded hollow concrete blocks available in the market.

scholarly journals THE FUTURE OF GREEN BUILDING MATERIALS IN EGYPT: A FRAMEWORK FOR ACTION

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Mona Azouz
Keyword(s):  
Sustainable Development ◽  
Life Cycle ◽  
Building Materials ◽  
Green Building ◽  
Climatic Conditions ◽  
Local Market ◽  
Sources Of Information ◽  
The Sustainable Development ◽  
Green Building Materials ◽  
Whole Life Cycle

Sustainable development has become a significant worldwide concern. The past few years have seen a lot of changes. Some of these affect how we do approach - and how we should approach - environmental issues. Because of their adverse impacts to sustainability, knowledge about building materials became a crucial dimension of green change in building and design. The problem is that in Egypt there is still no database for green building ma-terials. In spite that there are currently over 120 international green labelling programs for building materials worldwide, they cannot be locally used. This is because building materials and the way they are extracted, manufactured, used, transported, recycled or disposed differ from country to country. All these factors result in insufficiency of data & information on green building materials and those who are involved in the design, construction & man-agement of building materials are acutely lacking the basic information on materials that would allow them to make constructive changes. That's why the introduction of a system for specification, assessment & se-lection of green building materials is considered to be one of the corner-stones of promoting sustainable green building development in Egypt as an attempt to fulfil Goal 11 of the Sustainable Development Goals developed by the United Nations to make cities inclusive, safe, resilient and sustainable by 2030. The aim of the research is to develop a framework for a system for evaluat-ing sustainability of building materials in Egypt to achieve greener steps to-wards sustainability with a new way of scoring sustainability of building materials that evaluates both positive & negative ecological, social & health and economic impacts through the whole life cycle. This system could be applied in the development of the New Cites that considers the unique chal-lenges of the region and the local market and could be applied all over the country taking into consideration the nature of each region with its available building materials and specific climatic conditions and the different regional priorities and requirements. The research was based on an inductive approach through studying & analy-sis of the life cycle of the building materials, the different aspects and crite-ria for the evaluation of green building materials, currently available re-sources of information about building materials in Egypt and the interna-tional & national reference values & benchmarks that could be used as a base for the new system. Findings will lead to a proposed framework of a system for specification and assessment of green building materials in Egypt. This framework de-scribes all the kind of information required and the procedures that should be taken for the development of the system from collecting data till the es-tablishment of online guide for green building materials and a digital library for accessible and reliable information on green building materials that ena-bles building designers, constructors and developers to make reasoned choices based upon the health & environmental impacts of their decisions and eases the use & selection of Green Building materials in Egypt over the coming years.

Sign in / Sign up

Export Citation Format

Share Document