Exo Concrete Mold by Nelson Fossey

Published on September 25, 2014


Exogenous is an experimental process to shape concrete through a flexible and appropriable way. This mineral material most used by man after drinking water is ubiquitous in our environment, poles carrying our buildings to the roads linking our cities. Often regarded as brutal and rigid concrete is also synonymous of malleability.

Exogenous provides a process to implement and mold useful forms for outdoor courtyard or garden areas and design in-situ produced seatings.
Exogenous is an ephemeral tool, a cardboard mold which allows variable geometry to cast material, to compel the time of the solidification process then releases the solid piece.

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By its light and fragility, economic and simple nature, cardboard is an easily editable medium to vary a parameter of the form so it can adapt itself to the topology of the land on which it is installed.
The seating is designed as a flat pattern and becomes volumus under the action of the one who bends it and casts it. Once the concrete has solidified, the mold is removed, lightness and inconstant which generates a strong and durable piece.

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This local production, focusing on the process in the same way that the finalized result allows people to consider a singular interpretation, one variable in the production of what will constitute their own environments.

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Thanks to the sharing of this technique and the use of CNC machines, the public now has access to “the making process” and allows me to reconsider the designer’s role as a method thinker in order to emancipate the individual being.

Nelson Fossey


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