The flexural stresses and the initial moduli for a series of fatigue tests on HMA specimen s

are shown in Table P$7\mathrm{.}3.$ Determine the dynamic modulus for a frequency of $8$ Hz b y

Eq$.7\mathrm{.}15.[$Answer : $8$ X $105$ psi$]$

TABLE P$7.3$

Test No $.123456789$

Stress $($psi$)27825422819718516513711591$

Initial stiffnes s

modulus $(105$ psi$)1\mathrm{.}001\mathrm{.}141\mathrm{.}151\mathrm{.}341\mathrm{.}602\mathrm{.}872\mathrm{.}222\mathrm{.}783\mathrm{.}15$