A prototype travels badly when it has been designed as a final answer. That is precisely what makes the textile-reinforced concrete pavilion developed around EPFL interesting: the project that began in Lausanne is now meant to become the starting point for a new Nairobi case study, not a model to copy.12
The system combines textile reinforced concrete, or TRC, with LC3, a limestone calcined clay cement. EPFL presents the combination as a way to explore thin structures and lower material impact compared with conventional solutions.1
Building full-size to discover the problems
The project goes back to a workshop launched in 2019 around a 1:1 prototype.1 That scale changes everything. An elegant shell in a digital model suddenly has to be formed, handled, assembled and made to stand. Tolerances stop being parameters and become gaps that hands must absorb.
TRC can reinforce elements without reproducing the heavy steel reinforcement logic of conventional concrete. LC3 changes the binder composition. But a promising material on paper still does not explain how to build a pavilion with the tools, skills and supply chain available on a particular site.
That is where Nairobi becomes more than a destination.2 If the new case study is taken seriously, local context must be allowed to alter the choices: available resources, fabrication methods, assembly, climate, uses and know-how.
A good transfer produces differences
The simplest reflex would be to measure success by fidelity. Same shape in Nairobi as Lausanne, therefore method transferred. For an experimental project, that would almost be the opposite of the interesting result.
A genuinely transferable method has to distinguish what is essential from what can change. A structural principle may survive while geometry evolves. A material composition may remain relevant while requiring another fabrication process. An assembly detail may disappear because a local workshop has a better solution.
EPFL describes the workshop as interdisciplinary work connecting design, materials and construction.12 The prototype therefore becomes an object of conversation between disciplines, not merely the final demonstration of a calculation.
One nuance matters: the Nairobi case is ongoing workshop and research work, not established proof of a universal solution.23 Its future performance should not be written in advance. What can already be examined is the structure of the experiment.
It is a sensible one: build once, document what was learned, move the problem, then allow the second context to damage the first answer. A useful prototype is not one that travels intact. It is one that knows what to leave behind.12