| Procedure: 1. Determine the thickness of conventional DGAC required for the structural needs of the pavement (based on deflections and structural section stiffening using current Caltrans procedures). 2. Determine the thickness of conventional DGAC required to retard reflection cracking (using current Caltrans procedure). 3. Select a DGAC overlay thickness that satisfies the requirements of 1 and 2 above. 4. Use either Table 1 or Table 2 to determine the ARHM-GG equivalent sections, with and/or without SAMIs. Use Table 1 if structural needs control and Table 2 if reflection crack retardation controls. 5. If the ride score of the pavement to be rehabilitated is greater than the allowable maximum and there is no structural need per 1 above, select one of the following: a) Place two 0.10' thick lifts of ARHM-GG or b) Cold plane to a depth of 0.10', then place ARHM-GG as determined per Steps 1 through 4 above. |
