Laboratory Validation of an Endurance Limit for Asphalt Pavements (2013) / Chapter Skim
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13 The materials used in the uniaxial fatigue test were the same as those of the beam fatigue test, except that only one asphalt binder (PG 64-22) was used instead of three.
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14 PS DMR first cycle DMR rest of cycles R ta R = × × σ ε σ ε0, ( ) 7 where the DMR is the dynamic modulus ratio to account for specimen-to-specimen variability (32)
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15 Figure 15.
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16 was used, which is the PS value at any cycle (PSn) normalized to the initial stiffness (PSo)
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17 function to fit the PSR and rest period relationship are presented in Figure 19. In order to obtain a non-biased regression model, the sum of errors was set to zero.
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18 Rest Period (seconds) Stiffness (ksi)
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19 Figure 23. Effect of N on PSR at different initial stiffness and RP values.
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