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 produce 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 an industrial demonstration was adopted by a Swiss recycling company, Kibag.
Distributors / Implementing Organizations
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.
Intellectural Property Type
User Provision Model
Oxara is for business developers, industry partners and customers.
Distributions to Date Status
Industrial demonstration adopted by a Swiss recycling company, Kibag. The proof of concepts were implemented in Rwanda and Portugal.
Self-supported structure? (yes/no)
Soil, rock, and sand
Compressive strength (MPa)
Lateral load (MPa)
Standard brick making machines
Max. number of storeys (#)
Mix excavation earth materials with Oxacrete without the need for special tools
Excavation earth materials are mixed with Oxara's patented geopolymer to form bricks using standard brick making machines.
Manufacturer Specified Performance Parameters
90% CO2 reduction and cost reduction compared to conventional concrete. It improves workability improves the workability of the earth mixture for easier processing and casting, then accelerates the hardening in order to remove the formwork after 1-3 days.
Vetted Performance Status
No known safety hazards are related to this product.
Complementary Technical Systems
Standard brick production machine
Academic Research and References
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.
Compliance with regulations