Properties of arbolite with nanomodifying additive based on microsilica

The article studies physical and mechanical properties of structural and heat-insulating large-pore arbolite for wall unreinforced products with a nanomodifying additive. The nanomodifying additive is obtained by ultrasonic dispersion of microsilica in an aqueous medium of superplasticizer C-3. It determined granulometric composition and microstructure of microcstrap as an active mineral component of technogenic origin for NMA, consisting of polydisperse particles of amorphous spherical silicon dioxide with an average diameter of 1150 nm. The paper analyses indicators of dimensionality and aggregative stability of NMA. Dispersion of microcstrap in intensive ultrasonic field, excited in the С-3 aquatic environment, results in formation of aggregate-stable suspension with a disperse phase of an average diameter of 400 nm in the range of 56 to 614 nm. The developed nanomodifying additive makes it possible to accelerate the early strength maturing of arbolite and increase its compressive strength at the design age, as well as reduce effective porosity with a slight increase in medium density and heat conductance.