EMBODIED ENERGY ASSESSMENT OF THREE TYPES OF IRANIAN CLAY BRICKS AND COMPARISON OF THE EMBODIED ENERGY OF FIVE EXTERIOR WALL CONFIGURATIONS

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Aisan Gharbi Oskouei-FBE-Thesis-2391902.pdf

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2022-8-25

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Gharbi Oskouei, Aisan

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Environmental considerations and future sustainability are among the significant factors that have been considered in the present century. In the company of various influencing factors, the building and construction side has a momentous role in this regard due to its large contribution in consuming resources and energy, in addition to the release of detrimental greenhouse gases. The embodied energy of different alternative materials that are more commonly used in the construction of exterior walls and other related materials in Tehran the capital of Iran will be compared and analyzed from their cradle to gate based on an international database called ICE. For materials that their embodied energy is not evaluated in this database, various articles that include them have been reviewed, and among them, the number that has been mentioned in most of the articles has been selected, or a number as the average of all available data. A comparison will be made among these materials based on the measurements and results and will indicate that the application of which structural systems and materials have the most and the least negative impact on the environment from their embodied energy point of view. To achieve reliable results and comparable to global examples, the most authoritative database formed at the University of Bath in UK has been used. In addition to these analogies, which are based on available global data, the whole production chain of three types of one of the most widely used materials in Iranian construction, namely brick, has been fully studied based on site surveys. All required local data are collected through observation and interviews and integrated into international data to bring the results closer to Iran. Pre-use phase of the materials are assessed in this research based on LCA method which comprises checking the type and amount of fuel used in the transportation of raw materials from the source to the factory as well as within the site, required energy for the manufacture of new materials, and energy expenditure of the labors. These assessments allow materials to be compared and prioritized based on their initial energy, so that materials can be selected wisely to achieve a more sustainable construction. The results of this study show that the embodied energy of the studied materials, which includes refractory brick, red clay brick, and hollow clay brick are 8.344 MJ/Kg, 1.209 MJ/Kg, and 1.766 MJ/Kg respectively. Also, the results obtained from a comparative study between different alternative materials for the construction of external walls based on their embodied energy, relying on the ICE database, showed that the amount of embodied energy of Iran’s hollow clay brick, generic clay brick, concrete block, AAC block, and drywall system are equal to 6,105 MJ, 15,271.53 MJ, 5,134.30 MJ, 10,439.13 MJ, and 14,248.06 MJ, respectively.

Subject Keywords

Embodied Energy, Cradle-to-gate LCA, Iranian Brick, Wall Construction Materials

URI

https://hdl.handle.net/11511/98799

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Gharbi Oskouei, “EMBODIED ENERGY ASSESSMENT OF THREE TYPES OF IRANIAN CLAY BRICKS AND COMPARISON OF THE EMBODIED ENERGY OF FIVE EXTERIOR WALL CONFIGURATIONS,” M.S. - Master of Science, Middle East Technical University, 2022.