Combined Effect of External Aggressive Factors on Road Concrete Properties

Abstract

The durability of pavements in real operation is characterized by their resistance to various kinds of external aggressive influences. At the same time, the approach to assessing the properties of operational reliability using standard methods, in accordance with which tests are carried out not in a complex, but separately, is fundamentally wrong. The results obtained will be veiled and will not reflect the actual dynamics of the processes of destruction of the roadway in real operating conditions. Based on this, an experiment was set up in the work, the purpose of which is to study the cumulative effect of temperature fluctuations, humidity, as well as freeze and thaw cycles on the main properties of road concrete operated in the cold maritime climatic conditions. It has been established that the impact of alternating drying and moistening on cement concrete samples at an early age significantly reduces the indicators of frost resistance, abrasion, water absorption and bending strength, which ultimately will lead to the destruction of the roadway and a significant reduction in the intermaintenance period. The results obtained indicate the need to change approaches to assessing the properties of cement concrete, taking into account operating conditions