On Tuesday, December 10, 2024, Alia Bengana, architect and teacher, presented her book Concrete: Investigation in Quicksands in our space managed by architects, et al. While concrete is still widely used in construction, Alia Bengana’s book invites readers to reconsider its systematic use. This presentation was an opportunity to engage in a discussion with Klaas de Rycke, civil engineer and architect, partner at Bollinger+Grohmann, and Tiphaine Abenia, teacher and researcher at ULB, who moderated the session.
The idea of concrete as a major issue began to emerge when Alia traveled to the Sahara to build a guesthouse. There, she was struck by the intensive use of concrete in architecture and by the methods of sourcing sand necessary for its production. Indeed, in the middle of the desert, sand must be transported over 1,200 km from Algiers to be used in Timimoun!
After questioning her own practice, Alia decided to investigate the concrete industry. Together with her husband, Claude Baechtold, they highlight the dynamics of multinational concrete companies, willing to do anything to protect their monopoly in the construction sector. Their research is enriched by discussions with specialists, building professionals, and activists.
The result of this investigative work is the comic book Concrete: Investigation in Quicksands, published by Les Presses de la Cité earlier this year. The book allows the authors to make their findings accessible, to question preconceived ideas about concrete as a miracle material, and to propose proven bio-based alternatives for construction. The drawings by Antoine Maréchal, architect and illustrator, provide a precise and humorous account of this fieldwork, which lasted more than ten years.
During the event, the discussion between Alia Bengana, Klaas de Rycke, and Tiphaine Abenia addressed a number of issues, including the potentials and limits of construction without concrete today, the training of architects in bio-based materials, and the place of these topics in the educational system.