Oxacrete is an additive used to make cement-free concrete.
Oxacrete is a mineral-based chemical and non-toxic additive made by Oxara, a Swiss based start-up, which can be mixed with excavation waste and/or sludge to product cement-free concrete. Oxacrete can improve the workability of the earth mixture for processing and casting, which can be 1-3 days. As of October 2019, Oxara AG incorporated and looking for business developers, industry partners and customers. The proof of concepts was implemented in Rwanda and Portugal and industrial demonstration was adopted by a Swiss recycling company, Kibag.
Goal 11: Sustainable cities and communities
Any person, community, or organization that needs to construct a structure using cement-free concrete
Oxacrete is mixed with excavation materials and/or sludge in conventional concrete infrastructure to produce cement-free concrete, which has been found to reduce carbon dioxide emission by 90% compared to conventional concrete.
Oxara is for business developers, industry partners and customers.
Industrial demonstration adopted by a Swiss recycling company, Kibag.
The proof of concepts were implemented in Rwanda and Portugal.
Indication if an entire structure be built with this system alone (floors, walls and roof)
Main material composition
Measured in MegaPascals
Measured in MegaPascals
A list of additional equipment needed for construction/fabrication
Ground floor only = 1, Ground floor + 1 floor = 2, etc.
Composite estimated R-value
List of suitable climates for use of this components
How hard to learn?
Any educational programs available to learn this method of building
Excavation earth materials are mixed with Oxara’s patented geopolymer to form bricks using standard brick making machines.
90% CO2 reduction and cost reduction compared to conventional concrete, improved workability, cement-free concrete
No known safety hazards are related to this product.
Standard brick production machine
Minas, C., Carpenter, J., Freitag, J., Landrou, G., Tervoort, E., Habert, G. and Studart, A.R., 2019, Foaming of recyclable clays into energy-efficient low-cost thermal insulators, ACS Sustainable Chemistry & Engineering, 7(18), pp.15597-15606
Landrou, G., Brumaud, C., Plötze, M.L., Winnefeld, F. and Habert, G., 2018, A fresh look at dense clay paste: Deflocculation and thixotropy mechanisms, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 539, pp.252-260.
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