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A platform for research: civil engineering, architecture and urbanism
Nonlinearity, Heating, Fatigue and Thixotropy during Cyclic Loading of Asphalt Mixtures
This paper describes investigation into the change in complex modulus (norm and phase angle) during cyclic tests on bituminous mixtures. The change can be explained by four phenomena: nonlinearity, heating, thixotropy and fatigue. An experimental campaign has been performed at ENTPE laboratory in order to identify and quantify the first three phenomena. The analysis of the results reveals that the two reversible effects (heating and thixotropy) are very important and can not be ignored when interpreting fatigue tests. Nonlinearity, for the rather small strain level amplitudes considered in our experimental campaign (up to 122 μm/m), is also shown to be reversible. Heating is due to the viscous dissipated energy that heats the specimen. At the beginning of the test, temperature increase in the sample is shown to be proportional with the total dissipated energy. Thixotropy effect is quantified. In addition, it is shown that thixotropy effect can be modeled using an equivalent temperature increase.
Nonlinearity, Heating, Fatigue and Thixotropy during Cyclic Loading of Asphalt Mixtures
This paper describes investigation into the change in complex modulus (norm and phase angle) during cyclic tests on bituminous mixtures. The change can be explained by four phenomena: nonlinearity, heating, thixotropy and fatigue. An experimental campaign has been performed at ENTPE laboratory in order to identify and quantify the first three phenomena. The analysis of the results reveals that the two reversible effects (heating and thixotropy) are very important and can not be ignored when interpreting fatigue tests. Nonlinearity, for the rather small strain level amplitudes considered in our experimental campaign (up to 122 μm/m), is also shown to be reversible. Heating is due to the viscous dissipated energy that heats the specimen. At the beginning of the test, temperature increase in the sample is shown to be proportional with the total dissipated energy. Thixotropy effect is quantified. In addition, it is shown that thixotropy effect can be modeled using an equivalent temperature increase.
Nonlinearity, Heating, Fatigue and Thixotropy during Cyclic Loading of Asphalt Mixtures
Di Benedetto, Hervé (author) / Nguyen, Quang Tuan (author) / Sauzéat, Cédric (author)
Road Materials and Pavement Design ; 12 ; 129-158
2011-01-01
30 pages
Article (Journal)
Electronic Resource
Unknown
Nonlinearity, Heating, Fatigue and Thixotropy during Cyclic Loading of Asphalt Mixtures
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