Construction industry is using sand and gravels which are getting scarce around large cities as well as cement which contributes to greenhouse gas emissions. 5 to 10 % of global CO2 emissions come from cement, while gravel and sand weight 40% of all resources consumed by human activities. Furthermore, the resources scarcity and depletion increase the cost of the materials. Meanwhile before erecting buildings, a large amount of excavation material is removed to build foundations. This material is later landfilled but it is so abundant that it could directly replace the demand for sand, gravel and its composition is often close to earth which has been used as a vernacular construction material all over the world for centuries.
The technology proposed by Oxara is simply to process the excava