Abstract: A method and additive for mixing cement and concrete with aggregates formed of soil and ground material proximate to the job site which are conventionally unsuitable for the purpose. Employing the method and additive, unsuitable in situ materials, such as soil, soil containing clay, clay containing stone, clay containing sand, gravelly soil, saline-sand, and soil saturated with saline contaminated water may be employed as aggregates for cement mortar and cement concrete without concern for water-reabsorption and into such materials once the concrete has hardened to a solid solution of cement and the in situ materials.