Study on top-down cracking in asphlt pavements for farm road
2005
Takeuchi, Y.(Tokyo Univ. of Agriculture (Japan)) | Emukai, T. | Himeno, K. | Maki, T. | Saito, M.
In fatigue crack of the asphalt pavement there are Bottom-up cracking which progresses from the bottom of asphalt mixture layer to the surface and Top-down cracking which progresses from: the pavement surface. In the light volume traffic asphalt pavement like as the farm road, it has been considered that the Bottom-up cracking which is manifested as alligator cracking is dominant. And the investigation and analysis of the Top-down cracking which is manifested as longitudinal cracking within the wheel paths have been examined only in the asphalt pavements for heavy volume traffic like as national road and expressway. In this study, the cores extraction investigation and the traffic census, etc. for the farm road asphalt pavement without repair hysteresis in Fukushima prefecture were carried out. And from the investigations in this area it was confirmed that the cracking longitudinal cracks which appears at the asphalt pavement surface were the Top-down cracking and from fatigue analysis it was found that the Top-down cracking is more dominant than the Bottom-up cracking in this area.
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