MONITORING AND VISUAL DIAGNOSTIC OF ROAD PAVEMENT

Road monitoring is the most important method for assessing the technical condition of all road structures, including road pavements and road surfaces. Monitoring helps to solve the problem of maintaining the strength of the pavement. However, for a long time it was carried out visually by workers of road maintenance organizations. Receiving timely information about the damage and destruction of pavements, road organizations, however, could not reasonably plan repair work and, most importantly, accurately determine their volume and complexity. The solution to these problems was uncertain. The increase in traffic intensity on the roads, the increase in the speed of cars and their mass, and the high level of accidents required obtaining specific quantitative information. The result was the emergence of instrumental methods and special equipment for assessing the technical condition of pavements – strength, friction coefficient, and others. Another result was the disappearance of a visual method for diagnosing road structures and objects. But under conditions of high traffic intensity on roads, high cost of instrumental appraisal works, there was a practice of conducting instrumental surveys on a systematic basis, and before carrying out major repair or reconstruction work, moreover, as a justification of the need for them. As a result, many of the damage and the onset of the destruction of pavements and pavements were unnoticed, which subsequently greatly increased the cost of repairs. Under these conditions, it is proposed to resume the practice of visual monitoring of roads together with instrumental methods for evaluating their technical condition. As an example justifying this, the article deals with the question of the destruction of asphalt concrete pavements caused by the fatigue of asphalt concrete. Fatigue of asphalt concrete is manifested in the form of grids of short narrow cracks, which for a long time do not affect the evenness of the roadway surface and therefore are not recorded by instrumental methods. The vibration factor that contributes to (often initiating) the appearance of fatigue damage of asphalt concrete is experimentally considered, the energy level of road vibration vibrations is estimated.

monitoring, visual diagnostic, fatigue, cracks, vibration, asphalt, experiment, amplitude, vibration acceleration

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