Толмачов, С. М. та Tolmachov, S. M. (2019) СТИРАНІСТЬ ДОРОЖНІХ БЕТОНІВ ЯК КРИТЕРІЙ ПРОГНОЗУВАННЯ ЇХ ДОВГОВІЧНОСТІ. Вісник Національного університету водного господарства та природокористування (4(88)). с. 157-171.

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Анотація

У статті розглянуто питання взаємозв’язку стиранності бетону при одночасному впливі агресивних рідких водних середовищ і терміну його служби в покритті залежно від його складу. Введено поняття критичної стиранності й коефіцієнта стійкості структури бетону, які дозволяють оцінювати необхідність проведення профілактичнихзаходів щодо захисту й реанімації властивостей бетону.

Title in English

ROAD CONCRETE ABRASION AS CRITERION OF PREDICTION OF ITS DURABILITY

English abstract

Analysis of the state of cement-concrete pavements of roads and airfields shows that during operation they are subject to abrasive loads from vehicles. Over the past twenty – twenty-five years, traffic loads and traffic intensities have increased in several times. The number of flights is increasing and the carrying capacity of aircraft is growing. All this leads to significant wear of the pavements. In the event that cracks and other defects appear on the pavements, wear increases. The wear can increase if water, liquid aggressive environments, freezing and thawing act on concrete. However, studies of the abrasion of concrete pavements are not conducted. This makes it impossible to assess the degree of danger from the action of abrasive loads. The article discusses the impact of the action of water and an aqueous solution of sodium chloride on the abrasion of concrete. The results of studies of the abrasion of concrete in the dry and wet state, as well as after the cyclic action of saturation-drying and freezing-thawing, are presented. It is shown that the action of these factors leads to a decrease of the durability of concrete. The abrasion of concrete with a different ratio of coarse and fine aggregates was studied. To predict the abrasion and durability of concrete, the concepts of «critical abrasion» and «coefficient of resistance of concrete structure to wear» were introduced. The article shows that the amount of concrete wear determines its frost resistance and makes it possible to predict it. It has been established that the assessment of abrasion makes it possible to control the operational state of the concrete pavements and evaluate the need for concrete protection measures.

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