Abstract
In the asphalt pavement of Japan, porous asphalt pavement has increased certainly with highway etc. However, the porous asphalt pavement has a main problem that pot holes occur by aggregate scattering. The author focused on the particle size of 9.5 mm of the aggregate that are used with the porous asphalt mixtures and investigated about the fluctuation of aggregate scattering. As a result, this research confirms that the difference of aggregate particle size are influencing aggregate scattering by the method of Cantabro test. Furthermore, it was inspected that the difference of the contact of aggregate is influencing the scattering of aggregate by two-dimension image analysis software (iPas). ポーラスアスファルト舗装の施工実績は、全国の高速道路をはじめとして着実に増えてきている。しかしながら、供用後の主だった破損形態として,骨材飛散からくるポットホールがポーラス舗装を破壊する最大の要因となっている。そこで本研究では,ポーラスアスファルト混合物を製造するときに起こりうる骨材粒度のばらつきを想定した混合物についてカンタブロ試験を行い、粒度の違いにより損失率に差が出ることを確認した。また、そのメカニズムを各骨材間の接点数によるものと仮説を立て,アメリカ合衆国のウィスコン大学に設置されている、Modified Asphalt Research Centerのwebサイトにある、アスファルト混合物の二次元画像解析ソフトウェアiPasを利用し、その仮説の検証を行った。
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More From: Journal of Japan Society of Civil Engineers, Ser. E1 (Pavement Engineering)
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