Abstract
The Cross model is modified by introducing a long-term correction factor to predict the long-term mechanical behavior of compressed sand asphalt with the combination of the time–temperature superposition principle. A series of short-term experiments, including one-hour creep tests and constant strain-rate tests, are carried out to determine the Cross model parameters. Two long-term creep tests lasting more than 28days are conducted at two different stress levels. One is for determining the long-term correction factor and the other for the model validation. It is found that the modified Cross model can predict the long-term viscoelastic behavior of sand asphalt better than the Cross model.
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