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Table 2 Results of calculations of modulus gradient of a field core specimen (8 months aged at 30 °C) from direct tension test

From: An inverse approach to determine complex modulus gradient of field-aged asphalt mixtures

Iteration Loading time (s) Pseudo strain (με) Load (N) a b c n k n 0 k 0
1st 5–15 6.12 30.41 1.26 0.73 0.85 2.96 2.44 2.54 2.16
16–25 20.42 165.6 1.28 0.72 0.86 3.73 2.82
26–35 34.71 268.34 1.30 0.72 0.87 3.89 3.09
2nd 5–15 3.67 30.41 1.23 0.70 0.84 2.91 2.40 2.53 2.12
16–25 12.15 165.6 1.26 0.71 0.85 3.68 2.79
26–35 20.3 268.34 1.29 0.71 0.85 3.86 3.06
3rd 5–15 3.53 30.41 1.22 0.68 0.82 2.90 2.39 2.52 2.11
16–25 11.79 165.6 1.25 0.70 0.84 3.67 2.76
26–35 19.15 268.34 1.27 0.70 0.84 3.85 3.05