Influence of Variatropy on the Evaluation of Strength Properties and Structure Formation of Concrete under Freeze-Thaw Cycles

The resistance of concrete structures to the impact cyclic freezing and thawing is one key long-term characteristics, which further determines operation its service life. To date, alternating freeze-thawing cycles under various operating conditions has been little studied related several manufacturing processes: simple vibrated, variotropic centrifuged, improved vibrocentrifuged. purpose this study investigate effect heavy technology on alternate in an aggressive environment 5% sodium chloride solution, as well trend strength characteristics weight loss centrifuged vibrocentrifuged concretes after a series cycles. Standardized techniques for assessing scanning electron microscopy were used. Vibrated, made from same raw materials have differences 4.5%, 3%, 2%, respectively, 15.0%, 13.5%, 10%, when tested frost similar environments 15 by accelerated method. Centrifuged especially greater endurance compared vibrated.