1 Harrawood NCAT-IsSA Conference Final

7/27/2019 1 Harrawood NCAT-IsSA Conference Final

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NCAT

PreservationGroup Study Auburn University

ISSA, AEMA, ARRA Annual Conference

Feb 19th-22nd

Indian Wells, CA



NCAT Pavement Test TrackFounded in 1986 - By the National Asphalt Paving Association &

Auburn University

-World leader and authority in hot mix asphalt research,

development, technology, and education in the areas of

•Structural Design

•Construction Methods

•Materials and Testing

•Performance Measurement and Prediction

•Pavement Preservation, Rehabilitation, Recycling, and Maintenance

•Environment and Highway Safety

- Accelerated Loading – compresses 10-15 years of truck traffic into 2

years

- - Almost continuous truck traffic

- 1st

research effort in pavement preservation



NCAT Trucking Fleet

3

FleetFive – 8 axle trucks weighing

140,000 each

Run from 5:00 am to 11:00 pm

daily

Approximately 680 miles per day



4

Study Locations: (Auburn, Al) •

NCAT Test Track (various sections)(PP or reactive to distress trigger) •Lee Road 159 (multiple treatments placed within 2500’ section) Study Objectives: •Develop life cycle curve as compared to pretreatment condition

•Monitor pavement life extension of treated pavement

•Comparison of treatments will not be conducted by NCAT

- treatment to control section

Study Sponsors: Alabama DOT Oklahoma DOT

Mississippi DOT South Carolina DOT Missouri DOT Tennessee DOT North Carolina DOT FP-2 Inc.

Study Duration:

3 years

Preservation Group Study



FP2 Committee

• Mike Buckingham (Colas)

• Jim Moulthrop (Fugro)

• Mark Ishee (Ergon Asphalt & Emulsion)

• Tim Harrawood (Vance Brothers, Inc.)

• Worked with NCAT to develop study

treatments, materials, construction practices,specifications and sequence of construction.

5



NCAT Test Track Section

(List of Treatments)

6

• Rejuvenating Fog Seal

• Triple Chip Seal

• FiberMat (with Lightweight Aggregate)



Fog Seal (test track)(three locations)

7



Triple Chip Seal (test track)

(TBST #7, #89, W10)

8

hi l li i



Chip Seal Application

(test track) (tbst)

9



FiberMat

(test track) Light weight Aggregate

10

Diamond Grinding



Lee Road 159 Test Section

11

Martin Marietta Quarry

Asphalt Plant

Lee Road 159




12



Existing cracks werepainted during crackmapping operations

Crack width = ¼” and

smaller




Longitudinal crackspresent for entire length

of test section




6” of Granular Base

#78 Stone Surface Treatment (chip seal)

#5 Stone Surface Treatment (chip seal)

Prime Coat

1 3/8” Surface Mix (HMAC)

1 3/8” Surface Mix (HMAC)

3 1/8” Binder Mix (HMAC)

#78 Stone Surface Treatment (chip seal) CoresIndicate

5 to 5 5/8”

Pavement

Thickness

1999

Late

1980’s


1974

•Existing Surface is thirteen years old

•Study to take place on both inbound and outbound

lanes

•Quarry & Asphalt Plant w ill provide truck trafficinformation complete with tare and gross vehicle

weights.

• Appears to be structurally sound

•Rutting = none-minor

•Cracking = severe in outbound wheel paths/

moderate on inbound lane

Late

1980’s



16

2012 Preservation Group (PG) Study

• Fog seals (with and without rejuvenators) • Crack seals (routing/filling, hot air lance, go-type)

• Chip seals (single, double, triple, scrub, FiberMat)

• Cape seals (on chip/scrub seals, FiberMat)

• Micro surfacing (single, double, Capes)

• Plant mix overlays (4.75 screening mix variations)

• Ultra thin bonded wearing course

• Lightweight aggregates for surface treatments



Cell Treatment -1 Conventional fog Seal

1 Rejuvenating Fog seal

2 FiberMat Chip Seal

3 Control Section

4 Control Section

5 Crack Sealing (Rout & Seal in Inbound Lane - Blow and Seal in Outbound Lane)

6 Single Layer Chip Seal

7 Single Layer Chip Seal over Crack Sealing

8 Triple Layer Chip Seal

9 Double Layer Chip Seal

10 Cape Seal (Micro Surfacing over Single Layer Chip Seal)

11 Single Layer Micro Surfacing

12 Single Layer Micro Surfacing over Crack Sealing

13 Double Layer Micro Surfacing

14 Cape Seal (MicroSurfacing over Single Layer FiberMat)

15 Cape Seal (MIcroSurfacing over Single Layer Scrub Seal)

16 Scrub Seal Single Layer Chip Seal

17 FibetMat Single Layer Chip Seal 18 HMA Cape Seal (4.75 NMAS thin "screenings mix" virgin mix with PG67-22 over FibetMat Chip Seal)

19 4.75 NMAS thin "screenings mix" virgin mix with PG67-22

20 4.75 NMAS thin "screenings mix" virgin mix with PG67-22 on 100% foamed recycle 6 inch inlay)

21 4.75 NMAS thin "screenings mix" virgin mix with PG76-22

22 Ultra Thin Bonded Surface Course placed with spray paver

23 4.75 NMAS thin "screenings mix" 50% FRAP (54% aged Binder) overlay with PG67-22 Virgin Binder

24 4.75 NMAS thin "screenings mix" 5% PCRAS (19% aged Binder) virgin overlay with PG67-22 Virgin Binder25 4.75 NMAS thin "screenings mix" virgin overlay with Kraton High Polymer PG88-22 Binder

List of Treatments (Lee Road 159)



18

Treatment Layout



Section Breakdown(section #10 Cape Seal) (Chip Seal/Micro)

19

• 40 individual cells per 100’ test section

• Cell size = 5’wide x 10’ long

• 1,012 cells on Lee Road 159



Treatment Materials

• Fog Seals

- Conventional (CSS-1H) Emulsion

- Rejuvenating (CMS-1P) (QB) Emulsion

• Crack Treatments

-ASTM D-6690

• FiberMat

-Colas Emulsion

- #89 Granite 3/8” (lee Road 159)

- Lightweight Aggregate (Test Track)

• Scrub Seal -CMS-1P (CR) Emulsion

- #89 Granite 3/8”

• Chip Seals -CRS2-HP Emulsion

- #7 Granite ½”

-#89 Granite 3/8”

-W-10’s Granite ¼ minus, dense graded

• Micro Surfacing

-CSS-1HP

-#821 Limestone (ISSA type 2)

• Hot Mix Treatments -Various sources

-RAP, RAS, HIMA,

20



Study Challenges• Logistics, Logistics, Logistics

• 8 different emulsions, 3 emulsion suppliers (small qty’s)• 16 separate treatments

• 9 different combinations of treatments

• Multiple sources of aggregate

• Continuous string of 100 foot sections

•High production equipment / Small sections

• Protection of adjacent test sections

• Quarry & asphalt plant traffic

• Multiple calibrations

• Verification of application rates

• Concurrent paving operations

• Weather (major rain event during construction phase)

• Asphalt Plant breakdown

• County Grading Operations

21

Ch ll



Challenges(protecting adjacent test sites)

22

Ch ll



Challenges(protecting adjacent test sites)

23



Concurrent Paving Operations

24



25

Lee Road 159 Construction sequence

• FiberMat by Strawser on 7/17/12 (grader damage)

• Week of August 6th was busy and challenging

– Fog Seals/Crack Treatments/Chip Seal /Scrub Seals &

Micro Surfacing by Vance Brothers– 100% foamed recycle mix by Lanford Brothers

– Inbound thin overlays by East Alabama Paving (EAP)

• Outbound thin overlays by EAP on 8/13/12• Outbound bonded with Astec spray paver 8/28/12

• FiberMat on 159 by Strawser 9/19/12 (+W2lightweight)

C lib ti & V ifi ti



Calibration & VerificationChip Seal Aggregate/Application Rate

26




27

Calibration & Verification




28

lib i & ifi i



Calibrations & VerificationsEmulsion Application Rates

29

C lib ti & V ifi ti



Calibrations & VerificationsEmulsion Application Rates

30

li i



Application Rates

31

Install Treatment Application Aggregate Aggregate Emulsion Emulsion Length Width Total Diluted Diluted

Emulsion

gals Water gals

Aggregat

e

Cell Date Lane Source Type Source Type

Square

Yards App Rate/Sqy Mix used Used Used

App/Rat

e

1 8/6/2012

Rejuvenating Fog

seal Inbound N/A N/A

Ergon A

& E

CMS-1P

(QB) 100 12 133.00 0.085 11.305 5.653 5.653 N/A

1 8/6/2012

Rejuvenating Fog

seal Outbound N/A N/A

Ergon A

& E

CMS-1P

(QB) 100 12 133.00 0.083 11.039 5.520 5.520 N/A

Totals 266.00 0.084 22.344 11.172 11.172

Cell Install Treatment Application Agg Emul Emul Len Wid Total Emul Emul AGG Lbs Agg Tons Agg

Date Lane Type Source Type SQY % Gals used App Rate Used Used

13 8/10/2012 MicroSurfacing (double) 1st lift Inbound Limestone Ergon CSS-1HP 100 12 133 12% 34.92 18.6 2,473.80 1.24

13 8/10/2012 MicroSurfacing (double) 1st lift Outbound Limestone Ergon CSS-1HP 100 12 133 12% 29.85 15.9 2,114.70 1.06

13 8/10/2012 MicroSurfacing (double) 2nd lift Inbound Limestone Ergon CSS-1HP 100 12 133 12% 33.23 17.7 2,354.10 1.18

13 8/10/2012 MicroSurfacing (double) 2nd lift Outbound Limestone Ergon CSS-1HP 100 12 133 12% 38.12 20.3 2,699.90 1.35

532 12% 136.12 18.125 9,642.50 4.83

Total Total Avg Total Total

Rejuvenating Fog Seal

Micro Surfacing (double)

Treatment Application



Treatment Application(Micro Surfacing 1st lift)

32



FiberMat

33



Crack TreatmentsRout & Seal

(inbound Lane)

Blow & Seal

(outbound Lane)

34

C k T t t



Crack Treatment (rout & seal)

35



Chip Seal

36



Chip Seal

37



Micro Surfacing

38



Scrub Seal

39



Testing Overview

40

• ARAN Van– Weekly

• Video for crack mapping

– Weekly

• Friction (skid number)

– Monthly

• Moisture probe

– Monthly

• Falling weight deflectometer

– Monthly

• Capturing data weekly &

monthly

• Currently compiling data

• 1st

Review with studysponsors held on Dec 19th

& 20th 2012

• 2nd review scheduled for

June 6th & 7th 2013

R i C l



Review Cycle

41

• 1

st

Review with study sponsors held on Dec 19

th

& 20

th

2012• 2nd review scheduled for June 6th & 7th 2013



Early Observation



Early Observation

43Micro Surfacing (single lift, type II, App rate – 16.40)

Cape Seal – Chip Seal (single lift, #89 stone, CRS2-HP shot rate – 0.295 followed by

Micro Surfacing – Single Lift, Type II, App rate – 17.00)



Study Importance

• Reflects a shift in philosophy from agencies

- worst first to pavement preservation

• Will provide data that will assist pavement managerswith treatment selection

-Right Treatment, Right Road, Right Timing

• Will reinforce the value of PP to agencies that alreadyhave robust PP programs

• encourage innovation to enhance current and futuretreatments to better mitigate pavement distress’s

44



Special Thanks

• FP2 Inc. (sponsors) (committee)• Bryan Horner (E.D. Etnyre)

• Mark Ishee (Ergon Asphalt & Emulsions)

• Kenneth Buice (Crafco, Inc.)

• Crews from:

Strawser, Inc.

East Alabama Paving

Vance Brothers, Inc.

• Dr. Buzz Powell and the staff at NCAT45



Thank You!

Questions?

1 Harrawood NCAT-IsSA Conference Final

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