Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : A framework for sustainable slum development based on zero waste concept : "Learn to Earn Model"

Auteur : Elgizawy, Sally Maher

Université de soutenance : American University in Cairo

Grade : Doctor of Philosophy (PhD) 2019

Résumé partiel
The rapid urbanization of the last century caused more slum formation resulting in numerous adverse effects and is considered a major problem facing developing countries specially Egypt. This research touches on the complexities of sustainable slum development specially dealing with slum dwellers in a trial to enhance their capacities and potential which would benefit the community and lead to the development of the slum. Teaching them new skills through the “Learn to Earn Model”, will help them generate income which turns the slum into a catalyst for the economy rather than a burden on it. Another major problem in developing countries nowadays is waste accumulation. Zero waste strategy dictates that waste moves from a linear system to being more cyclical according to cradle to cradle approach so that materials are used efficiently. Construction and demolition waste (C&D), representing a huge part of the solid waste stream, is the focus of this research. It is certain that C&D waste with its continuously increasing quantity has tremendous adverse effects on sustainability affecting the environment, the local community and the economy of the country itself. To tackle the problem of C&D waste in Egypt effectively a series of steps were undertaken ; a thorough literature review on C&D waste in Egypt was conducted identifying a typical C&D waste stream and categorizing the components into likely to be recycled and others which are hard to recycle. Moreover, a quantification approach suitable for Egyptian projects was formulated and tested on 4 projects in Egypt and their construction waste index evaluated. The study on C&D waste revealed that gypsum and gypsum board waste is one of the main components in modern construction yet one of the less likely components to be recycled. This is mainly because of its suboptimal properties due to its mixing with other waste and the paper backing involved with the gypsum board waste. Extensive experimental work on recycling gypsum and gypsum board waste intends to produce an alternative brick able to mitigate the disadvantages of traditional brick by using waste as raw material and replacing the firing process often associated with bricks.

Mots clés : Zero waste, gypsum board, construction waste, recycling

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