North Dakota Asphalt Conference

April 5-6, 2016

NDDOT Asphalt Paving

Asphalt Program

Ride

Specifications

Longitudinal Joint Density

2015 In Review

2015 In Review

Projects

– 98 Programmed projects

2015 In Review

98 Projects

– 990 miles paved with HBP

– 2,537,635 tons of HBP

– 125,053 tons of asphalt cement

2015 In Review

2,537,635 tons of HBP

–Superpave FAA 40 44,988 tons

–Superpave FAA 42 26,950 tons

–Superpave FAA 43 370,644 tons

–Superpave FAA 45 1,120,040 tons

–Commercial Grade 15,028 tons

–Patching 13,242 tons

2015 In Review

2,537,635 tons of HBP(Continued)

–RAP Superpave FAA 40 84,913 tons

–RAP Superpave FAA 42 94,643 tons

–RAP Superpave FAA 43 207,226 tons

–RAP Superpave FAA 44 90 tons

–RAP Superpave FAA 45 588,141 tons

0

500,000

1,000,000

1,500,000

2,000,000

2,500,000

3,000,000

3,500,000

4,000,000

2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015

To

ns

Year

Quantity of HBP

2015 In Review

125,053 tons of asphalt cement

– PG 58-28 68,480 tons

– PG 58-34 0 tons

– PG 64-28 48,439 tons

– PG 64-34 8,134 tons

– PG 70-28 0 tons

0

25000

50000

75000

100000

125000

150000

2008 2009 2010 2011 2012 2013 2014 2015

To

ns

Year

Performance Graded Binders

PG 58-28 PG 58-34 PG 64-28 PG 64-34 PG 70-28

Ride

Ride Specifications For 2015

Types of projects with ride specifications

- Thin Lift Overlays 5

- Structural Overlays 9

- Reconstruction/Full Depth Reclamation 11

0

5

10

15

20

25

30

35

40

2006 2007 2008 2009 2010 2011 2012 2013 2014 2015

Nu

mb

er

of

Pro

jects

Year

Number of Projects withRide Specifications

0

10

20

30

40

50

60

70

2006 2007 2008 2009 2010 2011 2012 2013 2014 2015

IRI

Year

RIDE

Thin Lift Overlay Structural Overlay Reconstruction

$0

$100,000

$200,000

$300,000

$400,000

$500,000

$600,000

$700,000

$800,000

$900,000

$1,000,000

2006 2007 2008 2009 2010 2011 2012 2013 2014 2015

Do

lla

rs

Year

Incentive Payout per Year

Changes in Specifications

Changes In Specifications

- PG binder Multi-Stress Creep

Recovery(MSCR) requirements.

Longitudinal Joint Density

Longitudinal Joint Density

- 2014

- Project average for longitudinal density.

- 90.5 - 86.5

- 90.4 - 90.2

- 88.8 - 86.4

- 85.5 - 88.0

- 83.3 - 85.2

Longitudinal Joint DensityCENTERLINE LONGITUDINAL JOINTS:

Construct joints in a manner to provide a

continuous bond between the old and new

surfaces. When constructing longitudinal joints

adjacent to existing HMA pavements overlap the

existing pavement 1 inch to 1.5 inches. The initial

longitudinal roller pass shall be on the un-

compacted hot mat 6 inches to 1 foot from the

joint. The successive roller pass shall compact

the overlapped material and the 6 inch to 1 foot

material simultaneously.

Longitudinal Joint Density

- 2015

- Project average longitudinal densities.

- 87.1

- 87.4

- 91.3

- 89.6

- 89.8

- 85.9

- 87.7

Longitudinal Joint Density

- 2015

- Project average longitudinal densities.

- 87.1

- 87.4

- 91.3

- 89.6

- 89.8

- 85.9

- 87.7

2016

Any Questions?