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Causes of Cracking in Cast-in-Place Asphalt Mixtures
2012-12-19
Cracking in cast-asphalt mixtures occurs when repeated loading-induced fatigue stresses within the pavement materials exceed the tensile strength of the pavement mixture. On roads, vehicles—primarily automobiles—are the primary users of the pavement and also the main factors causing damage to the pavement structure and destabilizing the subgrade. With the development of traditional fatigue failure theories, it has become clear that pavement deterioration is significantly influenced by traffic load factors—including increasing traffic volumes, higher axle loads, rising vehicle speeds on highways, the vibrational characteristics of traffic loads, and the appropriateness of traffic parameter determination. These traffic-load factors play an increasingly important role in the early-stage distress of asphalt concrete pavements and cannot be overlooked.
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