Centre for Architectural Structures Technology (CAST)
University of Manitoba, Winnipeg

CAST is a laboratory for the research of fabric-formed concrete structures. As a formwork material, fabric provides a system of construction that is simple, highly reusable and lightweight. A single sheet of fabric can be used to form a multitude of different structural components – beams, trusses, columns, wall panels, vaults – and many combinations of these building parts.

Formwork is not static as it is with traditional plywood, steel or polystyrene formwork. Rather, form is generated by the event of introducing concrete into the mold. The fabric twists and contorts in response to the forces of gravity and the conditions that we have introduced by restraining the fabric in certain places.

The principle material used is a woven, geo-textile fabric that is permeable to air and water. This permeability results in concrete that is denser, has lower water content and an even distribution of air bubbles.

The column-capital-slab project was completed with Aleksandra Chomik and Leif Friggstad under the supervision of Ronnie Araya and Mark West.

The S3 and S4 vaults were completed with the CAST team under the supervision of Ronnie Araya and Mark West.

>CAST Website

http://www.stephenfaust.ca/files/gimgs/5_sun-slab.jpg
radiant variation
capital-column-slab
http://www.stephenfaust.ca/files/gimgs/5_sun-vault1a.jpg
radiant sun vault (inverse)
created from the mold from previous captial-slab
http://www.stephenfaust.ca/files/gimgs/5_8253493.jpg
sun vault variation
detail
http://www.stephenfaust.ca/files/gimgs/5_7283000.jpg
twisting variation
column-capital-slab
http://www.stephenfaust.ca/files/gimgs/5_8273613.jpg
subtle impression
column-capital-slab
http://www.stephenfaust.ca/files/gimgs/5_6052126.jpg
S3 vault variation
placing concrete + carbon fibre reinforcement
http://www.stephenfaust.ca/files/gimgs/5_6152255.jpg
S3 vault variation
demolding the vault
http://www.stephenfaust.ca/files/gimgs/5_6152244.jpg
S3 vault variation
http://www.stephenfaust.ca/files/gimgs/5_s3finalportraitfix.jpg
S3 vault original
[5m x 1m x 2.5cm] concrete w. carbon fibre reinforcing
http://www.stephenfaust.ca/files/gimgs/5_8063207.jpg
S3 vault original
cutting the vault to examine section profile
http://www.stephenfaust.ca/files/gimgs/5_6162284.jpg
S4 vault
pre-tensioning the fabric
http://www.stephenfaust.ca/files/gimgs/5_6262499.jpg
S4 vault
placing the glass-fibre reinforced concrete (GFRC)
http://www.stephenfaust.ca/files/gimgs/5_6262550.jpg
S4 vault [mold]
http://www.stephenfaust.ca/files/gimgs/5_6302574.jpg
S4 vault and team
http://www.stephenfaust.ca/files/gimgs/5_6302622.jpg
flipping S4 vault
http://www.stephenfaust.ca/files/gimgs/5_6302674s.jpg
S4 vault
casting surface
http://www.stephenfaust.ca/files/gimgs/5_7012721.jpg
S4 vault
casting surface detail
http://www.stephenfaust.ca/files/gimgs/5_7242921.jpg
S4 vault
shot-crete (sprayed concrete) base layer
http://www.stephenfaust.ca/files/gimgs/5_8043118.jpg
S4 vault
lifting the half-length cast
http://www.stephenfaust.ca/files/gimgs/5_8043131.jpg
S4 vault
mold and cast tension wrinkles
http://www.stephenfaust.ca/files/gimgs/5_8053180better_v2.jpg
S4 vault
half-length cast, with other casts