Without transport needs and with infinite recycling possibilities, earth is one of the building materials with the lowest environmental impact.However, its development is hindered by the time and the manpower required in conventional earthen construction techniques such as rammed earth or adobe.The purpose of this research is to develop an earth-based material that would be as easy and as cheap to use as current concrete products.To do so, we focused on the modification of clay properties with inorganic additives in order to be able to deflocculate and flocculate the clays during the casting process.As clay rheological behaviour is controlled by their surface charge, introducing potential determining ions by selected inorganic additives deflocculates the clay particles and considerably reduces the yield stress of the earth material.In this study, we are able to characterize the efficiency of different inorganic additives on the deflocculation by using Zeta potential measurements and Vane rheological tests.Less than 1 wt% of dispersant compared to fine particles is necessary to achieve a good workability.