Articles by Paul Yakubu

Local communities are more than just a collection of buildings and infrastructure. They possess a distinctive architectural character that mirrors their history, culture, and values. As part of our year in review, we take a deep dive into the top narratives that examine the architectural identity of different local communities.

Located 270km north of Dakar, the capital of Senegal, and near the border with Mauritania, is the Island of Saint-Louis. It is a prominent colonial city in West Africa, known for its blend of Mediterranean architecture with a tropical climate. Saint-Louis was founded by the French Colony in 1659 as its first trading post on the Atlantic coast of Africa. It later became the capital of French West Africa (AOF) and Senegal. However, it lost this status in 1902, which led to its economic decline.

Buildings that are designed to layer stories and memories, evoke a sense of aspiration, define cultural narratives, and build a national identity will always be important in all societies. When buildings have this power to shape communities, make an impact on a city’s image, and change the course of socio-economic growth, then they can be identified as iconic. Though the term “iconic” is subjective, it is one that pushes the boundaries of architecture in any context. It calls for spatial originality, proposes innovative material technology, and necessitates a radical socio-economic investment to be realized.

Historically, architecture has served as a canvas for artistic expression. Building elements have been adorned with relief-carved garlands, inscriptions, fresco murals, portrait busts, and classicizing figurative sculptures, all of which emphasize the unique and intentional nature of each component. However, the industrialization of the 19th century brought about a shift in ideals, that stripped architectural components of their decorative elements. Instead, it preferenced the search for beauty in standardization and the economic accessibility provided by mass-produced building elements.

Rammed earth is one of the oldest methods of constructing walls and still holds great potential for modern earth construction. One aspect of this potential is the gift of its colors and layers, which become visible as the formworks are removed, revealing a layered character. As a process that involves the layer-by-layer compression of gravel, sand, silt, and clay, its resulting appearance is a horizontal stratification of earth tones, material content, and curing procedures. This colorful appearance of rammed earth walls can be controlled and explored through patterns, texture, pigmentation, and natural clay colors, offering an opportunity to push its boundaries within architecture.

CPC concrete slabs are based on the technology of “carbon pre-stressed concrete,” which originated from a long-term research project conducted by the Zurich University of Applied Sciences Winterthur (ZHAW) and Silidur AG, Andelfingen. These panels are reinforced with thin, pre-stressed carbon strands, allowing them to be three to four times thinner and lighter while maintaining the same load-bearing capacity as traditional reinforced slabs.

The built environment is responsible for approximately 42% of annual global CO2 emissions. During a building’s lifespan, half of these emissions come from its construction and demolition. To decarbonize architecture and control global emissions, it is important to rethink and reduce the upfront or embodied carbon impacts of demolitions, as well as implement sustainable construction strategies for buildings. Demolitions typically involve dismantling, razing, destroying, or wrecking buildings and structural parts, leading to unsustainable levels of carbon emissions, material depletion, waste, and pollution. These hasty methods of ending the life cycle of a building have negative impacts on the environment, material components, and recycling strategies. Therefore, there is a clear need to re-think the way in which we approach the end of a building or infrastructure project’s life towards a more sustainable system of deconstruction.

Seratech’s technology, developed by Sam Draper and Barney Shanks, eliminates the CO₂ footprint of concrete and reduces carbon emissions in construction. This innovative process uses silica, a waste product from flue gases, as a carbon-negative cement replacement in concrete. By incorporating silica, the required amount of Portland cement is reduced by 40%, resulting in the production of carbon-negative concrete. This groundbreaking technology won the 2022 Obel Award for its focus on embodied emissions.

Rayon, an innovative online design tool that aims to create a new collaborative approach to developing “mundane buildings” within the city, has been selected as part of ArchDaily’s 2023 Best New Practices. Founded in 2021 by Bastien Dolla and Stanislas Chaillou, it is a collaborative design software that brings together professionals in the architecture, engineering, and construction (AEC) industries. The software company believes that there is a “culture of the ordinary” in architecture. This culture represents an ecosystem of buildings that may seem unremarkable or aren’t impressive landmarks in the city. However, these buildings and their construction professionals make up 90% of the urban fabric and contribute to the design culture that collectively gives identity to the city. The founders believe previous software generations have neglected this culture and propose Rayon as a novel tool to fill that gap by enhancing collaboration and user ergonomics.

Tropical Africa boasts vast forests that cover 3.6 million square kilometers of land in West, East, and Central Africa. These forests provide valuable timber resources that significantly impact sectors, such as the furniture, fuel, and paper industries. However, interestingly, timber is seemingly absent in the contemporary architecture of the countries in this region. While architectural taste plays a role, the main reasons for this absence can be attributed to the wood industries’ inability to meet the requirements of availability, affordability, aesthetic appeal, durability, and climatic and structural performance of timber. The wood industry in tropical Africa is mainly composed of informal and small-scale operations, focused primarily on sawing logs rather than refining wood for architectural or structural purposes. Despite this, the large number of informal enterprises in the region presents an opportunity to reshape the wood industry and utilize the local forestry resources to construct timber buildings.