Abstract
Operational frost resistance is one of the main requirements for building materials. The main factors leading to deterioration of the properties of bricks are freeze-thaw cycles. The most reliable way to check building materials for frost resistance is to test products for freeze-thaw cycles. However, the standard method for determining frost resistance is time-consuming, energy-consuming, and requires the use of expensive and difficult-to-use equipment. The engineering industry is interested in reducing the amount of testing time required to assess frost resistance. Researchers have been working for a long time to create express methods for determining the frost resistance of bricks. The article proposes new quantitative criteria for assessing the frost resistance of wall ceramics based on the hydrodynamic parameters of a porous solid. The proposed methodologies for assessing frost resistance make it possible to take into account the textural properties of porous products. As a result of studying the kinetics of water saturation and water yield of ceramic shards, a pattern of the influence of the hysteresis loop area on the frost resistance of wall ceramics was established. Due to their interrelation, regression equations were obtained for the dependence of the hysteresis loop area on the coefficient of water saturation and water yield. Calculation expressions for frost resistance are proposed, where the frost resistance of brick is estimated by the value of the hysteresis loop area or the coefficient of water saturation and water yield.
Published Version
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