Asphalt Concrete Overlay Optimization Based on Pavement Performance Models

Table 4

Radial strains prior to and after overlay.

Year	5	10	15	20	25	30	35	40
ACM layer thickness increase (mm)					—	—	—	—
AC 11-overlay E (MPa)	10891	10891	1089	1089	5445	5445	5445	5445
AC 11 O E (MPa)	5945	5682	5551	5445	5354	5304	5248	5205
AC 16 P E (MPa)	4540	4339	4239	4158	4088	4051	4008	3975
Strain prior to rehabilitation (Mpa)	0,751838	0,664456	0,620544	0,584984	0,48615	0,4465	0,42012	0,40146
Strain after rehabilitation (Mpa)	0,508571	0,464004	0,429907	0,40146	0,477312	0,428528	0,404145	0,382118

this theoretical calculation, the overlay thickness is computed exactly to return the pavement to its original bearing capacity; in the field, for practical reasons, the thickness would be rounded up to a whole number.