Updated on June 7, 2021


Created on October 19, 2020


Upcoming Update

Oxacrete is an additive used to make cement-free concrete.

Developed By Unknown
Content Partners


Product Description

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

Manufacturing/Building Method

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)


Primary material

Soil, rock, and sand

Compressive strength (MPa)


Lateral load (MPa)


Complementary equipment

Standard brick making machines

Max. number of storeys (#)


Suitable climates

All climates

Method complexity

Mix excavation earth materials with Oxacrete without the need for special tools

Training programs


Design Specifications

Excavation earth materials are mixed with Oxara's patented geopolymer to form bricks using standard brick making machines.

Technical Support


Replacement Components



100+ years

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


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