A possibility of determining frost resistance of magnesium chloride concrete according to the third accelerated method

This article discusses the use of methods to determine the frost resistance of concrete, involving the use of a sodium chloride solution as a medium for freezing and/or thawing for composites based on chlorine magnesia binders. The article presents the results of ultrasonic examination of samples of chlorine magnesium composites subjected to a frost resistance test, according to the third accelerated method. It was found that sample integrity is maintained after the expiration of the number of cycles corresponding to the F1500 brand, with a cyclic decrease and increase in their strength characteristics. The study shows the differences in the change in the masses of magnesium chloride samples, both modified and not modified with an additive based on a complex of fatty acids. The influence of this additive on the properties of the main structural phases of the magnesian stone is assumed. The inexpediency of using the second basic and all accelerated methods for determining frost resistance for chlorine magnesia composites was identified.