Fresh state behaviour is one of the most important points for most of the works in the field of construction and building in reinforced concrete.This is the reason why it is necessary to know fundamental aspects of behavior of concrete and mortar in fresh state.A good approximation to the rheology of the concrete from fresh to hardened state is represented by the Binghan model of fluid mechanics, being this period very influenced by the different chemical admixtures and additions used to be able to manage the mix.An understanding of how individual colloids interact with each other is crucial as long as agglomeration, segregation or right dispersion of the mixes is concerned.In this paper adsorption, micro-electroforetic, electroosmotic and electrochemical impedance spectroscopy measurements have been carried out on the plain binders and on fresh state cement pastes both mixed during the standard regime and during longer time, and the results have been compared and critically analyzed with the traditional characterization techniques for fresh state concrete, deriving important practical consequences not only for the handling of the fresh material but also for their hardened properties.The effect of mixing time has been studied in different binders and PCE and SNF superplasicizers.