That is the reason why we investigated the volumetric properties of the aqueous solutions of the CTAB and TX-100 mixture with a short-chain alcohol. These surfactants have a wide application in everyday life, industrial processes and laboratories. As a short-chain alcohol we took ethanol because the mixed water+ethanol solvents are of major importance and they are necessary ingredients in many cosmetics, cleaning agents or drugs. We measured the surface tension, density, dynamic viscosity and specific conductivity of these solutions. Moreover, in the range of surfactantand alcohol concentration in which we expected the association of their molecules we measured the dynamic light scattering of these solutions and based on these measurements we obtained the size of molecular aggregates.