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Effect of confinement pressure on creep and recovery response of asphalt concrete mixtures
Published in Politecnico di Torino (DIMEAS)
2012
Abstract
The distress in the asphalt concrete pavements such as rutting can be better quantified by a creep and recovery experiment. In this investigation, asphalt concrete specimens with nominal maximum aggregate size of 19 mm and air void content of 7 % were subjected to trapezoidal loading cycles with a fixed loading and unloading rate. After each loading cycle of 0.4 s, a recovery period of 0.6 s was applied. The samples were tested at unconfined and confined (100 and 200 kPa) conditions. All the experiments were conducted at 20, 40, 55 °C temperature. A three stage creep curve was observed under certain conditions of confinement and temperature. The Francken model was used to interpret the experimental data and a parametric analysis was carried out to quantify the influence of confinement conditions on the onset of tertiary stage.
About the journal
Journal7th International Conference on Maintenance and Rehabilitation of Pavements and Technological Control, MAIREPAV 2012
PublisherPolitecnico di Torino (DIMEAS)
Open AccessNo
Concepts (17)
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    Asphalt
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    ASPHALT MIXTURES
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    Asphalt pavements
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    CONCRETE MIXTURES
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    Concretes
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    Creep
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    Recovery
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    Unloading
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    CONCRETE SPECIMENS
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    CREEP AND RECOVERY
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    CREEP CURVES
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    LOADING AND UNLOADING RATES
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    LOADING CYCLES
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    MAXIMUM AGGREGATE SIZES
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    Parametric -analysis
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    RECOVERY PERIODS
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    ASPHALT CONCRETE