Effect of Non-Functional Polyorganosiloxane Additives on the Hydrophysical Properties of Cement Systems

Abstract:

A research on the influence of non-functional organosilicon compounds (OSC) - polyorganosiloxanes on the hydrophysical properties of cement systems has been carried out. Two groups of polyorganosiloxanes with the most typical structure (linear, cyclolinear, and three-dimensional) have been studied: polyorganylsilsesquioxanes and polydiorganylsiloxanes. Within the group of polyorganylsilsesquioxanes the polyphenylsiloxane (PPS) and polyvinylsiloxane (PVS) differing in the type of radical and degree of structure completion were studied. Within the group of polydiorganylsiloxanes the polydimethylsiloxane liquid (PMS-6) and dimethylsiloxane rubber (SKTN) differing in molecular weight were studied.It has been established that non-functional organosilicon compounds (polydiorganylsiloxanes, polyorganylsilsesquioxanes) are able to hydrophobize the cement systems when introduced by the method of mechanical activation. At the same time, SKTN is a powerful agent for efflorescence formation, preventing the removal of calcium hydroxide Ca (OH)₂ out of the cement stone.

• Periodical: Materials Science Forum (Volume 1081)
• Pages: 209-213
• DOI: https://doi.org/10.4028/p-23y8rr
• Online since: March 2023
• Authors: S.V. Vavrenyuk*, V.G. Vavrenyuk, N.V. Kuznetsov
• Keywords: Cement Stone, Efflorescence, Hydrophobization, Modifiers, Organosilicon Compounds, Polydiorganylsiloxanes, Polymer Structure, Polyorganylsilsesquioxanes, Water Absorption

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DOI: 10.4028/www.scientific.net/msf.945.263

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