ENSURING INCREASED DURABILITY OF THE PAVEMENT STRUCTURE ON REINFORCED CONCRETE ROAD BRIDGES

Abstract

Introduction. The pavement on reinforced concrete road bridges is one of the main structural elements of the structure, the technical condition of which affects the safety of the structure as a whole. The durability of the asphalt pavement is influenced by a number of factors, including the type of construction of the designed pavement, including the waterproofing coating, as well as the resistance of the structure to climatic factors and the effects of traffic. Problemstatement. Most of the highway bridges were built in the 60s and 80s of the 20th century. The artificial structures were designed in accordance with the regulations and technical specifications in force at the time, taking into account the prospects for the development of transport infrastructure and calculating the estimated traffic intensity of up to 20 thousand vehicles per day. However, over the last decade, the intensity and speed of road traffic has increased significantly, as well as the movement of heavy vehicles (mostly uncontrolled), especially in summer, when the air temperature fluctuates above +28 °C. In turn, this leads to excessive load on the bridge deck structures, including the asphalt pavement, which leads to its destruction (formation of cracks, potholes, sagging, rutting and other damage). Results. A technological scheme for the construction of a pavement with increased durability on reinforced concrete road bridges is presented.