GDOT Reference Tables

Specification tables from Georgia Department of Transportation for asphalt paving operations.

Table 2 — Application Rates for Emulsified Asphalt (Tack Coat)

Applies to: Anionic Emulsified Asphalt or Cationic Emulsified Asphalt (gal/yd²)

Tack Use	Min (gal/yd²)	Max (gal/yd²)
New AC Pavement to New AC Pavement or Thin Lift Leveling	0.05 (0.23 L/m²)	0.08 (0.36 L/m²)
New AC (≤25% RAP) to Aged Existing Pavement or Milled Surface	0.06 (0.27 L/m²)	0.10 (0.45 L/m²)
New AC (>25% RAP) to Aged Existing Pavement or Milled Surface	0.08 (0.36 L/m²)	0.12 (0.54 L/m²)

Notes:

Allow standard emulsion to break per manufacturer's recommendation
Proceed with paving only after emulsion has cured to the satisfaction of the Engineer
Do NOT use anionic/cationic emulsified asphalt under OGFC or PEM on interstates or limited access state routes

Lift Thickness	Minimum Air Temperature
1 in. (25 mm) or less	55°F (13°C)
1.1 to 2 in. (26–50 mm)	45°F (8°C)
2.1 to 3 in. (51–75 mm)	40°F (4°C)
3.1 to 4 in. (76–100 mm)	35°F (2°C)
4.1 to 8 in. (101–200 mm)	32°F (0°C) and rising base must not be frozen

Additional Weather Limitation (Section 400.3.05.E):

Beyond Table 4 above, OGFC mix and PEM have a stricter placement floor:

Do not place OGFC mix or PEM below 60°F (16°C) air temperature.
With an MTV (Material Transfer Vehicle), OGFC/PEM may be placed at 55°F (13°C) when approved by the Engineer.
Do not mix and place any asphaltic concrete on a wet or frozen surface.

Mix Type	Min Layer Thickness	Max Layer Thickness	Max Total Thickness
25 mm Superpave	2½ in. (64 mm)	5 in. (125 mm)*	—
19 mm Superpave	1¾ in. (44 mm)	3 in. (75 mm)*	—
12.5 mm Superpave	1⅜ in. (35 mm)	2½ in. (64 mm)/*	8 in. (200 mm)
9.5 mm Superpave Type 2	1⅛ in. (29 mm)	1½ in. (38 mm)***	4 in. (100 mm)
9.5 mm Superpave Type 1	⅞ in. (22 mm)	1¼ in. (32 mm)	4 in. (100 mm)
4.75 mm Mix	¾ in. (19 mm)	1⅛ in. (29 mm)	2 in. (50 mm)
9.5 mm OGFC	75 lbs/yd² (41 kg/m²)	95 lbs/yd² (51 kg/m²)	—
12.5 mm OGFC	85 lbs/yd² (46 kg/m²)	110 lbs/yd² (60 kg/m²)	—
12.5 mm PEM	110 lbs/yd² (60 kg/m²)	165 lbs/yd² (90 kg/m²)	—
9.5 mm SMA	1⅛ in. (29 mm)	1½ in. (38 mm)	4 in. (100 mm)
12.5 mm SMA	1⅜ in. (35 mm)	3 in. (75 mm)	6 in. (150 mm)
19 mm SMA	1¾ in. (44 mm)	3 in. (75 mm)	—

Footnotes:

* Allow up to 6 in. (150 mm) per lift on trench widening
** Allow up to 4 in. (100 mm) per lift on trench widening of ≤2 ft when no overlay is required
*** Place 9.5 mm Superpave and 12.5 mm Superpave up to 4 in. (100 mm) thick for driveway and side road transition