Abstract
The research of the structure formation process on a nanolevel of the samples of hydrated Portland cement compositions containing the modifying additives has been conducted with the help of small angle neutron scattering method. Carbonate and aluminum alkaline slimes as well as the complex additives containing surfactants were used as additives. The influence of slimes and surfactants on structural parameters change of Portland cement compositions of the average size of the disseminating objects, fractal dimension samples is considered. These Portland cement compositions are shown to be fractal clusters.
Highlights
There is a formation of particles of calcium silicate hydrate (C-S-H) in the course of hydration of cement clinker
The research of the structure formation process on a nanolevel of the samples of hydrated Portland cement compositions containing the modifying additives has been conducted with the help of small angle neutron scattering method
Durability, water resistance, frost resistance and other properties of cement stone depend on nanoparticles C-S-H form and sizes distribution, a ratio of free water and water filling the space between firm hydro silicates particles as well as pores and their form and size distribution are determined by structural parameters of material on micro and a nanolevel
Summary
There is a formation of particles of calcium silicate hydrate (C-S-H) in the course of hydration of cement clinker. The structural parameters affect the properties of the formed cement stone. Durability, water resistance, frost resistance and other properties of cement stone depend on nanoparticles C-S-H form and sizes distribution, a ratio of free water and water filling the space between firm hydro silicates particles as well as pores and their form and size distribution are determined by structural parameters of material on micro and a nanolevel. The applied additives influence the structure of initial materials and their operational properties [3,4,5,6,7,8] It is observed in the presence of nanodisperse component of the additives in cement compositions [9, 10]
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