STEADY-STATE DEFORMATION BEHAVIOUR OF ASPHALTIC MIXTURES

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TAHERKHANI H.; JAVANMARD M.

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Journal: IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING Year:2011 | Volume:35 | Issue:C1 Page(s): 81-94

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Information Journal Paper

Title

STEADY-STATE DEFORMATION BEHAVIOUR OF ASPHALTIC MIXTURES

Author(s)

TAHERKHANI H. | JAVANMARD M. | Issue Writer Certificate

Keywords

BITUMENQ3

CREEPQ3

UNIAXIALQ3

TRIAXIALQ3

STEADY-STATEQ3

DEFORMATIONQ3

Abstract

Permanent DEFORMATION of asphaltic materials has a major contribution to rutting. Under static loading, the STEADY-STATE DEFORMATION of asphaltic materials is the key component of the permanent DEFORMATION. The STEADY-STATE DEFORMATION behaviour of a standard 70/100 penetration grade pure BITUMEN and two types of asphaltic mixtures used in the UK pavements, namely a 10mm Dense BITUMEN Macadam (DBM), which is a dense graded mixture, and a 30/10 Hot Rolled Asphalt (HRA), which is a gap graded mixture have been studied. Using Dynamic Shear Rheometer (DSR) Constant stress CREEP tests were conducted on the BITUMEN at 10oC and 20oC over a range of stress levels. UNIAXIAL CREEP and constant strain rate tests have been conducted over a range of stress levels, strain rates and temperatures, and TRIAXIAL CREEP tests have been conducted over a range of stress levels and confining pressures on the mixtures. The STEADY-STATE DEFORMATION behaviour of the BITUMEN is found to be linear at stress levels less than 100 kPa and non-linear power law CREEP with a power exponent of 2.6 at stress levels higher than 500 kPa. The STEADY-STATE DEFORMATION behaviour of both mixtures is found to be well captured by the Modified Cross Model which predicts linear viscous behaviour at low stress levels and non-linear viscous behaviour at high stress levels. The STEADY-STATE DEFORMATION behaviour of the DBM mixture is found to be more sensitive to the stress level.The temperature dependency of the STEADY-STATE DEFORMATION behaviour is found to be well captured by the Williams-Landel-Ferry (WLF) equation. It is found that confinement has a stiffening effect on the STEADY-STATE DEFORMATION behaviour of the mixtures. The stiffening effect of the confining stress is found to be higher for the DBM mixture.

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APA: Copy

TAHERKHANI, H., & JAVANMARD, M.. (2011). STEADY-STATE DEFORMATION BEHAVIOUR OF ASPHALTIC MIXTURES. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING, 35(C1), 81-94. SID. https://sid.ir/paper/62412/en

Vancouver: Copy

TAHERKHANI H., JAVANMARD M.. STEADY-STATE DEFORMATION BEHAVIOUR OF ASPHALTIC MIXTURES. IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING[Internet]. 2011;35(C1):81-94. Available from: https://sid.ir/paper/62412/en

IEEE: Copy

H. TAHERKHANI, and M. JAVANMARD, “STEADY-STATE DEFORMATION BEHAVIOUR OF ASPHALTIC MIXTURES,” IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING, vol. 35, no. C1, pp. 81–94, 2011, [Online]. Available: https://sid.ir/paper/62412/en

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