12 Décembre – Thesis defense - Éva Quéheille

13 h30 Amphi - B5 (Pessac)

Circular economy and conception of an optimization tool for the strategy of deconstruction waste management.

Constant growth of urban population tends to speed up fields and structures renewal. In building and civil engineering, buildings deconstruction is increasing. It produces 35 millions tons of waste per year in France. However, only 45 % of these waste are recovered. The European and French objective of 70 % recovery rate is not reached. In order to improve deconstruction waste management, this thesis studied two subjects. The first subject was for a better environmental assessment of a deconstruction strategy. For an operational use, greenhouse gases emission completes efficiently a recovery rate. For a research use, a life cycle analysis enables to better study the impacts from a strategy’s several phases. It is relevant to study waste management and deconstruction works together, whereas other existing tools often study only one of these two sides. The second subject was for deconstruction strategies optimization with operational (cost and delays) and environmental (recovery rate and impacts by greenhouse gases or life cycle analysis) objectives. A Multi-Objective Optimization model is created to be resolved by a metaheuristic algorithm. The model application on study cases showed the model capacity to offer solutions that are well balanced between the objectives and that can be directly applied.

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