Fatigue resistance of hot mix asphalt at low temperatures: is there a way to reduce the test efforts?

• Autores: K. Mollenhauer, Michael P. Wistuba
• Localización: Bearing capacity of roads, railways and airfields: proceedings of the 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields, Champaign, Illinois, USA, June 29-July 2, 2009 / Erol Tutulumluer (dir.), Imad L. Al-Qadi (dir.), Vol. 1, 2009, ISBN 9780415804325, págs. 349-358
• Idioma: inglés
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• Resumen

  • The fatigue resistance of hot-mix asphalt is usually assessed by means of cyclic laboratory tests. According to the European standard EN 13108-20 the fatigue properties for one single asphalt concrete mixture are derived at one temperature and one frequency.

    Based on the test results gained by applying three load amplitudes, a fatigue function is developed and used as an indicator for the pavement’s durability. In reality, the asphalt pavement life depends on further conditions as vehicle speeds and pavement temperatures. Hence, the laboratory test program is usually extended to more test temperatures and frequencies. Consequently the assessment of fatigue properties becomes a time consuming and cost intensive issue. This paper analyses possible ways to reduce the effort in fatigue testing without downgrading the quality of the derived fatigue function by means of Uniaxial Cyclic Tensile Stress Tests at varied frequencies and temperatures on six different asphalt mixtures.