Multi-Criteria Analysis of a Developed Prefabricated Footing System on Reactive Soil Foundation

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Teodosio, Bertrand ORCID: 0000-0002-3909-4054, Bonacci, Francesco, Seo, Seongwon, Baduge, Kasun Shanaka Kristombu ORCID: 0000-0001-5183-701X and Mendis, Priyan (2021) Multi-Criteria Analysis of a Developed Prefabricated Footing System on Reactive Soil Foundation. Energies, 14 (22). p. 7515. ISSN 1996-1073

Abstract

The need for advancements in residential construction and the hazard induced by the shrink–swell reactive soil movement prompted the development of the prefabricated footing system of this study, which was assessed and compared to a conventional waffle raft using a multi-criteria analysis. The assessment evaluates the structural performance, cost efficiency, and sustainability using finite element modelling, life cycle cost analysis, and life cycle assessment, respectively. The structural performance of the developed prefabricated system was found to have reduced the deformation and cracking by approximately 40%. However, the cost, GHG emission, and embodied energy were higher in the prefabricated footing system due to the greater required amount of concrete and steel than that of the waffle raft. The cost difference between the two systems can be reduced to as low as 6% when prefabricated systems were installed in a highly reactive sites with large floor areas. The life cycle assessment further observed that the prefabricated footing systems consume up to 21% more energy and up to 18% more GHG emissions. These can significantly be compensated by reusing the developed prefabricated footing system, decreasing the GHG emission and energy consumption by 75–77% and 55–59% with respect to that of the waffle raft.

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Item type Article
URI https://vuir.vu.edu.au/id/eprint/42826
DOI 10.3390/en14227515
Official URL https://www.mdpi.com/1996-1073/14/22/7515
Funders http://purl.org/au-research/grants/arc/IC150100023
Subjects Current > FOR (2020) Classification > 3702 Climate change science
Current > Division/Research > Institute for Sustainable Industries and Liveable Cities
Keywords life cycle assessment, LCA, energy, carbon, greenhouse gasses, GHG
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