DRY MIXTURES

UDC 666.971.1

[:en]Abramova A. Yu.[:ru]Абрамова А. Ю.[:] [:en]National Research Moscow State Construction University, Moscow, Russia[:ru]Национ. исслед. Моск. гос. строит. ун-т, Москва, Россия[:]

[:ru]Пустовгар А. П.[:en]Pustovgar A. P.[:] [:ru]МГСУ, Россия[:en]The Moscow State University of Civil Engineering, Russia[:]

Alitinform №2 (67) 2022 г. 47-56 p.

Abstract

An analysis of the theoretical prerequisites for the use of surface-active substances (surfactants) in the composition of dry building mixtures (DBM), in particular, to increase the adhesive strength at the tile adhesive/ceramic tile interface, and to generalize the accumulated domestic and foreign experience in this area, was carried out. Based on a review of literature data, it has been established that an increase in adhesion is possible due to a decrease in surface tension at the phase boundary (surface effect of a surfactant), which allows for better wetting of the substrate with an adhesive, as well as by reducing the viscosity of cement systems (dispersive effect of a surfactant), which leads to increase the contact area of the adhesive and the substrate.
Particular attention is paid to the experience of using a surfactant additive in the composition of tile adhesive, which is a sulfoalkyl ether and promotes an increase in open time with little effect on the setting time, an increase in tensile strength in bending, an increase in resistance to efflorescence and ease of application.
The characteristic features of the methodology for assessing the impact of surfactants on the adhesive properties of DBM, such as 3D laser scanning and photogrammetry, are explored.

Key words:

dry building mixtures, tile adhesive, adhesion, surfactants, laser 3D scanning, photogrammetry