Investigating the Effect of Acrylon Acrylonitrile Acrylate on the Fatigue Life of Asphalt Mixtures

Document Type : Research Article


1 Department of Civil Engineering, Faculty of Engineering, University of Guilan

2 Department of Civil Engineering, Islamic Azad University-Ahar Branch

3 Islamic Azad University-Ilkhchi Branch


Over time, with repeated loading, if the amount of strain or stress exceeds the strength of the asphalt mixtures, cracks will form on the surface and under the asphalt mixture layer. These cracks gradually develop as the number of loads increases and spreads to the asphalt body. Fatigue is one of the most important factors that reduce the life of asphalt pavements. One of the effective parameters in the occurrence of fatigue cracking is the properties of the bitumen used. According to previous studies, the use of nanomaterials and polymer additives has been considered by researchers in recent years. Due to the much higher cost of production or production of polymeric materials, the use of these materials in this research has been considered. One way to control this type of failure is to use bitumen, aggregate or asphalt mixers. Accordingly, in this study, the effect of using a polymer additive called acrylon acrylonitrile acrylate (ASA) as a bitumen modifier on the potential for fatigue cracking in asphalt mixtures has been investigated. Two types of aggregates, with different mineralogical properties, PG 64-16 as bitumen and ASA additive, in two different percentages of bitumen mass were the materials used in this study, which were tested at two temperatures and five different stress levels. To determine the percentage of optimal bitumen, the Marshall mixing design method has been used and to determine the fatigue life of asphalt mixtures, the indirect tensile fatigue test method has been used. The results of this study show that the use of polymer additives has increased the fatigue life of asphalt mixtures. The fatigue life of granite aggregate specimens was longer than that of limestone aggregates, but the increase in life resulting from the use of ASA increased the fatigue life of granite aggregate specimens. The increase in temperature and stress level, as expected, has reduced the fatigue life of asphalt mix samples, which is much lower in samples made of bitumen modified with polymeric materials than the samples.


Main Subjects

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