the usa or more advanced mathematical programs such as the mathematical from wolfram research inc of champagne ill u s a or matlab manufactured by the math works inc of the usa contain tools for the minimization of linear or non linear objective functions subject to a set of constraints which can be incorporated within the mathematical formula for the calculation of the economically efficient mix compositions these mathematical techniques will be applied in the context of the invention not only to the objective defined above namely the search for a concrete mix composition that matches adequately close a given target rheological profile but also to situations where such a nominal profile is fully or partially absent in this case the same interpolation and search procedure will be applied to find a concrete mix composition that optimizes a given criterion function for example it may be applied to a minimize the cost of the concrete mix whilst maintaining the pressure on the piston of a pump as required to push concrete at a given rate through a given pipe system b minimize the cost of the concrete mix whilst maximizing the bulk density of a concrete block produced under a given regime c minimize water cement ratio of a block making mix maximizing the compressive strength of a freshly made block prior to hardening or d minimize the cost of a concrete mix whilst maintaining force required to.