2360 Mix Requirements

2360 Mix Requirements
(Superpave)

Full Mn/DOT specification available from Mn/Road.

Asphalt mixture meeting the requirements of this specification is required on all roadways carrying more than 3 million ESAL's. It is also required on all construction projects requiring more than 1,000 tons of hot mix with traffic less than 1 million ESAL's. Mn/DOT's long-term goal is to reduce the use of the Marshall mix design, and focus on the gyratory compactor, which is used in the Superpave mix design. More information on Superpave testing is available from the North Central Superpave Center.

Design Criteria
General Notes
Mixture Designation Example

Click here for the Superpave binder specification that Mn/DOT has used since 1997.

Table 1. Design Criteria 2360

20 yr. ESAL's Design Lane x 106		Non Wear >100 mm (4") from surface	Non Wear >50 mm <=100 mm (>2" <=4") from surface	Wear <50 mm (2") from surface
All	Specify	SPNWB_30_	SPWEB_40_	SPWEB_40_ SPWEB_30_7
All	Contractor's Option to Supply	Agg. size A, C	Agg. Size A	Agg. Size A

General Notes

1. Minimum lift thickness:
Agg. Size A (12.5 mm (1/2") maximum, 9.5 mm nominal ) - 40 mm (1-1/2" minimum.
Agg. Size B (19.0 mm (3/4") maximum, 12.5 mm nominal ) - 50 mm (2" minimum.
Agg. Size C (25.0 mm (1") maximum, 19.0 mm nominal ) - 75 mm (3" minimum.

2. Aggregate sizes specified and Contractor options should be used unless lift thickness precludes large aggregate otherwise specified.

3. Specify size A when course/lift is identified as 40 mm (1-1/2") or less.

4. See Typical Sections for individual lift/course identification.

5. For mainline paving, select asphalt binder grade from Tech. Memo No. 99-03-MRR-01. For shoulders where traffic allowed, use the same binder grade as the mainline. For shoulders where traffic is prohibited, select either PG 52-34 or PG 58-28 by matching with the mainline low PG number. (i.e., for mainline PG 64-28, shoulder binder is PG 58-28.)

6. For slow and standing traffic, consider selecting a higher high temperature binder grade and/or mix type.

7. Designation for wear mixture placed on shoulders. Note 3.0% air voids.

Table 2: Mixture Designation Example: SPWEB440E

Traffic Level	Lift	Max Agg. Size	Traffic Level (ESAL's x 10^6)	Air Voids	Binder Grade
SP	WE	A	1 (<= 0.3)	30 (3.0)	A = PG 52-34
	NW	B	2 (0.3 to <=1)	*40 (4.0)*	B = PG 58-28
		C	3 (1 to <=3)		C = PG 58-34
			*4 (3 to <=10)*		D = PG 58-40
			5 (10 to <=30)		E = PG 64-28
			6 (30 to <=100)		F = PG 64-34
			7 (> 100)		G = PG 64-40
					H = PG 70-28
					I = PG 70-34
					L = PG 64-22

The format for 2360 Pay Items will be as follows:
2360.509 Type SP ___ __ _______ Course Mixture (__,__)……metric ton (English ton)

An example of the pay item for the above mixture designation is:
2350.609 Type SP 12.5 Wearing Course Mixture (4, E)…..metric ton (English ton)

Note: Numbers in parenthesis denote the traffic level and the PG grade.

2360 Mix Requirements (Superpave)

General Notes

2360 Mix Requirements
(Superpave)