Performance of geosynthetic-interlayered asphalt layers under cyclic loading

Saride, Sireesh and Kumar, V.V. (2019) Performance of geosynthetic-interlayered asphalt layers under cyclic loading. In: 16th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2019, October 2019 - 18 October 2019.

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The current study aims to evaluate the performance of geosynthetic-interlayered asphalt layers under cyclic loading conditions. In this regard, a control and geosynthetic-interlayered asphalt beam specimens were tested under a cyclic four-point bending test apparatus replicating an equivalent single axle contact pressure of 550kPa. Two different types of geosynthetic-interlayers viz., glass-grid composite (GGC) and bi-axial polyester grid (PET) were adopted. The cyclic four-point bending test results suggest that the geosynthetic-interlayers enhanced the performance life of asphalt layers by about 46-fold and 38-fold, respectively for GGC and PET interlayered specimens with respect to the control specimens. Geosynthetic-interlayers found to initiate delamination of the asphalt layers at the interface. To understand the delamination of the asphalt layers, the interface bond strength properties of control and geosynthetic-interlayered asphalt specimens were evaluated. Results revealed that there is a reduction in the interface bond strengths of about 36% and 16% in the GGC and PET interlayered specimens. Overall, it was found that along with the tensile properties bonding characteristics also important in enhancing the performance life of geosynthetic -interlayered asphalt layers.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Asphalt layer; Bonding characteristics; Contact pressures; Cyclic loading conditions; Four-point bending test; Geosynthetic interlayers; Geosynthetics; Interface bond strength
Subjects: Civil Engineering
Divisions: Department of Civil Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 19 Jul 2021 04:11
Last Modified: 19 Jul 2021 04:11
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