@article{3631ea1871da453e91f37a50cd6692d4,
title = "A fracture energy approach to model the thermal cracking performance of asphalt rubber mixtures",
abstract = "The existing Thermal Cracking Model (TCMODEL) that is currently an integral part of the Mechanistic Empirical Pavement Design Guide (MEPDG) has been shown to adequately predict low temperature cracking of asphalt concrete mixtures utilizing conventional binders. However, test results from several asphalt rubber mixtures in this research study showed that the TCMODEL in the MEPDG falls short in predicting the observed thermal cracking resistance of these mixtures in the field. This paper presents development and findings of a new method for thermal cracking potential evaluation in asphalt mixtures, with a focus on asphalt rubber mixtures. Refinements of the existing IDT test protocol are presented, and a new Crack Depth Fracture Model is proposed to include a fracture energy parameter. The new fracture energy model is evaluated with laboratory test results and rationality corresponding with field observations. The new model proved to be satisfactory in predicting the thermal cracking performance for both conventional and asphalt rubber mixtures. Its use in future MEPDG models is recommended.",
keywords = "Asphalt rubber mixtures, Crack depth fracture model, Idt test, Mepdg, Thermal cracking",
author = "Aleksander Zborowski and Kamil Kaloush",
note = "Funding Information: Von Quintus, H.L., “Performance Prediction Models In the Superpave Mix Design System”, SHRP Report No. A-699. Strategic Highway Research Program, National Research Council, Washington, DC. , USA, 1994. Funding Information: Witczak M.W., “Harmonized Test Methods for Laboratory Determination of Resilient Modulus for Flexible Pavement Design, Volume II - Asphalt Concrete Material, Final Project Report, NCHRP Project No. 1-28A. Transportation Research Board-National Research Council, Washington, D.C., USA, 2003. Funding Information: Witczak M.W., Kaloush K.E., Pellinen T.K., El-Basyouny M., and Von Quintus H., Simple Performance Test for Superpave Mix Design, NCHRP Report 465, Transportation Research Board-National Research Council, Washington, D.C., USA, 2002. Funding Information: Buttlar W.G. and Roque R., “Development and Evaluation of the New SHRP Measurement and Analysis System for Indirect Tensile Testing of Asphalt Mixtures at Low Temperatures”, Transportation Research Record, National Research Council, National Academy Press, Washington, D.C., USA, No. 14541994, p. 163-171. Funding Information: Lytton R.L., Uzan J., Fernando E.G., Roque R., Hiltunen D., Stoffels S.M., “Development and Validation of Performance Prediction Models and Specifications for Asphalt Binders and Paving Mixes”, SHRP-A-357, Strategic Highway Research Program National Research Council, 2101 Constitution Avenue, NW Washington, DC, USA, 1993.",
year = "2011",
month = jan,
day = "1",
doi = "10.1080/14680629.2011.9695250",
language = "English (US)",
volume = "12",
pages = "377--395",
journal = "Road Materials and Pavement Design",
issn = "1468-0629",
publisher = "Taylor and Francis Ltd.",
number = "2",
}