A Study of Superpave Design Gyrations for High Traffic Surface Mixtures

Kosparmakova S.A. Azlan M.N. Fischer D.E.
2023 Institute of Metallurgy and Ore Beneficiation JSC

Kompleksnoe Ispolzovanie Mineralnogo Syra
2023 #327 Issue 4 41 - 49 pp.

The methodology of the research that was used to evaluate the comparative results of surface mixes with a nominal maximum aggregate size of 12.5mm is presented in this paper. Also presented are the recommended Ndes values for C-level and D-level mixes, which are designed to handle traffic levels of 3-30 Million and greater than 30 Million ESALs, respectively. In order to determine the amount of asphalt that was present, asphalt concrete mixes were fabricated utilizing the Superpave design process at Ndes levels of 50, 75, 100, and 125 gyrations. Using the Asphalt Mixture Performance Tester instrument, we were able to determine the dynamic modulus (E*) at the design asphalt content for a number of different gyration levels. The E* data and related binder properties were used as input in the AASHTO Darwin-ME software to anticipate the rutting and fatigue performance of the mixtures. This was accomplished by assuming a model pavement section and appropriate traffic levels. In order to determine which Ndes are most appropriate, relative performance indicators for rutting and fatigue have been developed and plotted against asphalt content. The Ndes value of 85 gyrations was found to be ideal for both surface mixes after extensive research.

Asphalt concrete mixtures , Design gyrations , Fatigue cracking , Relative performance , Rutting , Superpave

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L.N. Gumilyov Eurasian National University, Kazhymukhan Munaytpasov Street 13, Nur-Sultan, 010000, Kazakhstan
University Pendidikan Sultan Idris, Perak, Tanjung Malim, 35900, Malaysia
Satbayev University, Institute of Metallurgy and Beneficiation, st. Shevchenko, 29/133, Almaty, 050010, Kazakhstan

L.N. Gumilyov Eurasian National University
University Pendidikan Sultan Idris
Satbayev University

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