Pre-Research Pays Off

May 17, 2016

Project background

Existing sections

Asphalt mixtures

Construction sequence and schedule

Sensors

Mixture production and paving

Construction QM technology

Questions?

National Pavement Preservation Study

Development of a National Cracking Test

Primary objective - validate laboratory cracking tests by establishing correlations between test results and measured cracking performance in real pavements within a very short timeframe

A suite of laboratory cracking tests will be performed by MnDOT and NCAT

Identify those tests that best correlate with field cracking

One project, two locations, two experiments

Pavement preservation, and

Cracking performance

Cracking sponsor states: ◦ Alabama, Florida, Illinois, Michigan,

Minnesota, New York, North Carolina, Oklahoma, and Wisconsin

3-year national pooled-fund project

The objective is to validate laboratory cracking performance tests by way of correlations between those results and observed cracking performance in the test sections

MnDOT is doing this in conjunction with 4 other states and with materials similar to those they typically use

Other requirements include getting at least 6 years of good structural performance and mixture durability.

This is not an exhaustive mix study

We only have 8 sections and mixes to deal with

Washington

Oregon

California

Nevada

Idaho

Montana

Wyoming

Colorado Utah

New Mexico Arizona

Texas

Oklahoma

Kansas

Nebraska

South Dakota

North Dakota Minnesota

Wisconsin

Illinois

Iowa

Missouri

Arkansas

Louisiana

Alabama (DOT & DEM)

Tennessee

Michigan

Pennsylvania

New York

Vermont

Georgia

Florida

Mississippi

Kentucky

South Carolina

North Carolina

Maryland Ohio Delaware

Indiana West Virginia

New Jersey

Connecticut

Massachusetts

Maine

Rhode Island

Virginia

New Hampshire Michigan (upper pennisula)

2015 Track Research Sponsors

FHWA

FP2

Companion project to NCATs 2015 CG work near Opelika, AL

MnROAD Focus on low-temperature cracking ◦ Fatigue, and top-down cracking potential

Samples of mixture obtained during production will be made available to other agencies and laboratories

MnDOT personnel will observe, photograph, monitor, video tape, and collect samples from selected construction activities performed under this Contract

Letting date: Friday, May 20, 2016

Plan holders ◦ Total 18

◦ Primes 6

◦ Subs 8

◦ Suppliers 3

MnROAD Mainline

MnROAD Low Volume Road

Cracking Group Cells 16-23

MnROAD Mainline Asphalt Sections ◦ Cells 16 through 23, ~4,500 feet available

Constructed 2008, MnROAD Phase II efforts ◦ 5 in. asphalt over 12 in. aggregate base

Two types of asphalt mixture

Two types of aggregate base

Remove and replace upper 18 in

Construct new base and asphalt ◦ minimize the variable of support for low-temp

cracking experiments

~100 in/mi

Very little transverse cracking

Some wheel path cracking, possible top-down

Primary distresses: ◦ Wheelpath cracking (surface)

◦ Longitudinal centerline and shoulder joint deterioration, some raveling

Performance history of both MnDOT network and Cells 16-23 suggests future direction for further low-temp cracking experiments

CELLS and DESIGN DETAILS TRANSVERSE CRACKS

CELL HMA PG BASE LO SEV MED SEV

16 WMA 58-34 RPCC 1 (6') 1 (24')

17 WMA 58-34 RPCC/Agg 2 (3') -

18 WMA 58-34 RAP - -

19 WMA 58-34 Agg - -

20 HMA w/30% RAP 58-28 Agg 1 (8') -

21 HMA w/30% FRAP 58-28 Agg 1 (4') -

22 HMA w/30% FRAP 58-34 Agg - -

23 WMA 58-34 RRB - -

New BAB Construction

0

5

10

15

20

25

30

35

0 2 4 6 8 10

Pavement Age, years

To

tal

Tra

ns.

Ck

. R

ati

ng

PG -34 Pen Graded

MnROAD/NCAT CG Project 19

Class 5Q

In place material

MnROAD/NCAT CG Project 20

Contractor selects and procures materials

Submit materials to NCAT, who will perform mix designs ◦ Contractor may determine order in which designs are

performed

8 weeks required to complete all 8 mix designs ◦ Mix design JMFs will be provided as they become

available

Project team reviews JMF

Bituminous Unit issues MDR

JMF and MDR go to Contractor

Recycled Asphalt Shingles (RAS) ◦ Required in 2 of 8 mixes

◦ Must be Manufacturing Waste Scrap Shingles (MWSS)

Recycled Asphalt Pavement (RAP) ◦ Required in all 8 mixes, varying percentages

◦ RAP from existing mainline test cells not permitted

Target % Asphalt Binder Replacement (ABR):

◦ 𝐴𝐵𝑅(%) = 𝑅𝑒𝑐𝑦𝑐𝑙𝑒𝑑 𝑏𝑖𝑛𝑑𝑒𝑟 𝑓𝑟𝑜𝑚 𝑅𝐴𝑃+𝑅𝐴𝑆

𝑇𝑜𝑡𝑎𝑙 𝑎𝑠𝑝ℎ𝑎𝑙𝑡 𝑏𝑖𝑛𝑑𝑒𝑟∗ 100

RECYCLED

MATERIAL

CELL

NO

MIX

DESIGNATION

MAX AGG

SIZE (mm) ABR % RAS

Air voids at

Ndesign Ndesign

MSCR

BINDER

GRADE

COMMENTS

16 SPWEB540L 12.5 30-40 Yes

4.0 80 PG 64S-22

17 SPWEB540L 12.5 20-30 4.0 80 PG 64S-22

18 SPWEA540L 12.5 15-25

No

4.0 80 PG 64S-22

19 SPWEB530L 12.5 15-25 3.0 100 PG 64S-22

20 SPWEB540A 12.5 25-35 4.0 80 PG 52S-34

21 SPWEB540C 12.5 15-25 4.0 80 PG 58H-34

22 SPWEB540C 12.5 15-25 4.0 80 PG 58H-34 3139 modified

for limestone

23 SPWEB540I 12.5 10-20 4.0 80 PG 64E-34

Highly

modified

asphalt binder

Types of cracking to be investigated ◦ Low temperature a “given”

◦ Top-down very likely

◦ Fatigue also possible

Production mixture testing ◦ Low temp: SCB-IL, DCT-MN, SCB-MN

◦ Top down, fatigue: Overlay Tester, BB Fatigue

◦ ME Design: E*

◦ Additional: BBR mix beams (related study)

◦ Loose mix, cores

◦ Fracture energy test data analysis: both FE and FI

24

Cell Mix

Designation Binder (MSCR)

Pay Item 2360.501 TYPE SP 12.5 WEARING COURSE MIXTURE ...

16 SPWEB540L PG 64S-22 (5,H)

17 SPWEB540L PG 64S-22 (5,I)

18 SPWEB540L PG 64S-22 (5,L)

19 SPWEB530L PG 64S-22 (5,M)

20 SPWEB540A PG 52S-34 (5,B)

21 SPWEB540C PG 58H-34 (5,C)

22 SPWEB540C PG 58H-34 (5,E)

23 SPWEB540I PG 64E-34 (5,F)

Item No. Item Unit

2331.609 BITUMINOUS MATERIAL FOR MIXTURE TON

Starting Date: July 11, 2016 Completion Date: October 15, 2016

Removals Mix Design

Test Roll Production trials

Break for Sensor Work

Base Construction

Test Roll

Break for Sensor Work

Paving

Bituminous millings

Aggregate base ◦ Haul and stockpile material at MnROAD Stockpile

Area

Produce and place 25 tons uniform trial mixture ◦ Sampling and volumetric testing ◦ Evaluate placement

Various locations @ MnROAD site

◦ Ensure JMF requirements are met ◦ No density testing

If JMF requirements satisfied proceed to test cell production

If JMF requirements not met make adjustments

Project includes special provisions for: QUALITY MANAGEMENT - PAVER MOUNTED THERMAL PROFILE (PMTP) METHOD QUALITY MANAGEMENT SPECIAL – INTELLIGENT COMPACTION (IC) METHOD

Dave Van Deusen, P.E.

Project Manager - MnROAD

651-366-5524 (office)

612-968-4187 (cell)

dave.vandeusen@state.mn.us