Open AccessOptimization of the composition of hydrophobized cellular concrete according to its moisture-transporting and water-holding characteristics
Author(s) -
Svitlana Davydivna Lapovska,
Vasily Klapchenko,
Grygorii Krasnianskyi,
Yu G. Gasan,
Irina Kuznetsova
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/907/1/012040
Subject(s) - frost (temperature) , moisture , humidity , water content , relative humidity , environmental science , porosity , materials science , diffusion , water resistance , composition (language) , geotechnical engineering , composite material , geology , meteorology , thermodynamics , physics , linguistics , philosophy
The article is devoted to the study of the possibility of obtaining information about frost resistance and strength of concrete based on the analysis of its moisture-transporting and equilibrium water-holding properties. The dependences of the moisture diffusion coefficient, equilibrium moisture content at various values of relative humidity and porosity of autoclaved cellular concrete specimens on the concentration of water-repellent additive were studied. A comparison of the results of these measurements with the data on frost resistance, got by the direct method according to the current standards, have been made. It is shown, that moisture-transporting and water-holding characteristics can be used to assign concrete compositions optimal in frost resistance and strength. The mechanisms of the influence of water repellent on the frost resistance at its various concentrations are considered. It has been established that the composition of cellular concrete containing 2% water-repellent additive is optimal.