Rutting Resistance of Asphalt Pavements with Fine Sand Subgrade under Full-Scale Trafficking at High and Ambient Air Temperature | Perpustakaan Direktorat Bina Teknik Jalan dan Jembatan

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Rutting Resistance of Asphalt Pavements with Fine Sand Subgrade under Full-Scale Trafficking at High and Ambient Air Temperature

J. Wu - Nama Orang; F.Ye - Nama Orang; J. Ling - Nama Orang; at al - Nama Orang;

The rutting performance of an asphalt pavement structure with a fine sand subgrade and a high groundwater table was evaluated with full-scale trafficking tests with the Mobile Load Simulator 66 (MLS66) on Chong-ming Island, Shanghai.The purpose was to establish the reliability of the design with fine sand.There were two test sections with the same asphalt pavement structure but different subgrade depths. Track I was designed with a shallow 1.5m fine sand subgrade and Track II was designed with a medium 3.0m fine sand subgrade. The two tracks were constructed using traditional procedures on the natural clay subgrade covered with a layer of graded macadam. The asphalt pavements consisted of three asphalt layers (total 200 mm) and two cement-treated aggregate layers (total 540 mm, with 5% cement). The top 600mm to 800mm of the subgrade was treated with 3 to 4% cement. Track I was subjected to 1 million load applications at elevated temperature for 15 days and 1.1 million load applications were applied onTrack II at ambient air temperature for 17 days. Profile and temperature data were collected. Pavement profiles and diagnostic excavation indicated that pavement deformation originated from compression and shear flow of the asphalt materials. No fatigue cracking was observed. The influence of the fine sand subgrade and its depth on pavement rutting was negligible. Cores and pit surveys showed that the top asphalt layer of 120mm thickness was significantly affected by trafficked loading and temperature. The rate of rutting and total deformation volume of asphalt at high temperature was 1.5 times that of the test at ambient air ttemperature during early trafficking, about three times more thereafter. The rate of deformation on Track I was almost twice as fast as that ofTrack II. It is concluded that thick asphalt pavement with cement- treated-aggregate base will have good rutting resistance and can be expected to be a perpetual structure.

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Judul Seri: Advances in Pavement Design through Full-scale Accelerated Pavement Testing (R)
No. Panggil: -
Penerbit: London : ., 2012
Deskripsi Fisik: -
Bahasa: Indonesia
ISBN/ISSN: 978-0-415-62138-0
Klasifikasi: NONE
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Tipe Media: -
Tipe Pembawa: -
Edisi: -
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Info Detail Spesifik: -
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