Investigation of Hydrated Portland Cement Structure Formation by Means of Small Angle Neutron Scattering

Investigation of the process of structure formation of samples of hydrated cement compositions on the nano level is conducted with the help of the method of small angle neutron scattering (neutron wavelength is λ=0.3 nm) both on the basis of Portland cement without additives and that modified by various nanoadditives and nanomodifiers of artificial (alpha aluminium oxide, gamma aluminium oxide) and technogenic (sludge) origin, as well as by complex additives containing surfactants. Dynamics of changes of structural parameters of samples of cement compositions depending on time is analyzed. Changes of correlation functions of scattering objects and fractal dimensions are observed. It is substantiated that Portland cement compositions are fractal clusters.