Soil has been used as building material for thousands of years with a decrease in popularity after the industrial revolution. Nowadays, there is a growing interest in the implementation of unfired soil-based building solutions for their low environmental impact, performances and availability. Traditional soil construction techniques have recurrently included vegetal fibres to enhance soil performance and recent studies highlight a predominant use of agro- and non-agro-waste for unfired soil construction. The article reviews the state-of-the-art of the use of excavated soil and biowaste in the construction industry including a novel focus on urban-only waste and on building technologies using the integration of these two secondary construction material flows. Our literature review highlights a lack of references about the joint use of these secondary resources. Finally, future research orientations are suggested to promote their implementation in the building sector, which could improve urban waste management.

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Résumé. Nicolas Van Oost est architecte et ingénieur. En 1987, il démarre sa carrière au bureau d'Émile Verhaegen. Depuis 2016, il est chairman chez Archipelago. Un bureau d'étude qui s'engage dans des projets institutionnels et d'utilité publique dans les domaines de la santé, de l'éducation et de la recherche. En 1994, il commence sa mission à l'UCLouvain en tant que maître deconférences invité. Depuis 2015, il est professeur à LOCI et responsable de l'Atelier Institution et édifice et des cours Matières à construire, Gestion de projet et monde de l'édification. Il collabore aussi à l'atelier de projet d'architecture Synthèse. Depuis plus de six ans, il représente également l'UCLouvain à l'Ordre des architectes. Il est père de trois enfants, collectionneur d'art moderne et contemporain et il est passionné par l'aquarelle. Abstract. Nicolas Van Oost is an architect and engineer. He began his career at Emile Verhaegen's office in 1987. He has been chairman of archipelago since 2016. A design office that engages in institutional projects and projects of public utility in the fields of health, education, and research. He first joined UCLouvain as a guest lecturer in 1994. Since 2015, he has been a professor at LOCI, where he leads the Institution and Building workshop and the courses Materials to Build and Project management and the world of construction. He is also active in the Synthesis workshop. For over six years, he has been UCLouvain's representative to the Ordre des architectes (Order of Architects). The father of three children, he collects modern and contemporary art and is passionate about watercolor.