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Design gyration number determination of 100 mm-diameter asphalt mixtures

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Design gyration number determination of 100 mm-diameter asphalt mixtures (3.119Mb)
Tarih
2019
Yazar
Tapkın, Serkan
Keskin, Mustafa
Üst veri
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Özet
At present, there is no accepted standard by highway authorities on the compaction procedures of 100 mm-diameter gyratory compactor specimens. In previous studies on gyratory compaction, the method of either coring from 150 mm specimens, or preparing taller specimens than the usual 63.5 mm-long Marshall specimens, has been undertaken. However, the utilisation of 150 mm-moulds produces a significant amount of mechanical disturbance during the coring process of 100 mm-diameter specimens. The note-worthy aspect of this study is that a new standard for preparing gyratory compactor specimens with a diameter of 100 mm and a length of approximately 63.5 mm has been proposed for the first time. In this study, the design gyration number of the asphalt mixture was obtained by carrying out extensive laboratory testing on the specimens prepared, and by changing various testing parameters including the gyration number, angle of gyration, specimen height, and ram pressure. First, tests using 600 kPa ram pressure and a 1.25° gyration angle with varying gyration numbers were carried out. Then, the gyration angle was changed from 1.25° to 1.85° by 0.05° increments. Following that, a completely different pattern of loading level using 240 kPa with a 2° gyration angle was investigated. And finally, changing the gyration angle from 1.60° to 2.40° by 0.20° increments was carried out to provide a wider scope of investigation. As a result, the design gyration number for 100 mm-diameter asphalt mixtures was determined as 40 under medium traffic conditions.
Bağlantı
http://hdl.handle.net/20.500.12566/470
Koleksiyonlar
  • İnşaat Mühendisliği Bölümü / Department of Civil Engineering
  • Scopus İndeksli Yayınlar Koleksiyonu
  • WOS İndeksli Yayınlar Koleksiyonu

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