1. Emulsion Task Force (ETF)
AASHTO TSP2
Indianapolis, IN
Nov 28-29, 2018
By: Colin A. Franco, P.E.
Assc. Chief Eng.
RIDOT

2. ETG & ETF – Founding Father
Jim Sorenson

3. PAVEMENT PRESERVATION EXPERT TASK GROUP
ETG - Formation
PAVEMENT PRESERVATION EXPERT TASK GROUP
(PPETG)
Established in 1991 by FHWA / Jim Sorenson
Promote the institutionalization of the concepts of pavement preservation
Parent group of “Emulsion Task Force”

4. Preservation Partnerships
8 Regional
Bridge & Pavement
Preservation Partnerships
Bridge Preservation Partnership

5. Mission
PPETG
The FHWA PPETG will advance and improve the state of the practice in the area of pavement preservation by working collaboratively with federal, state, local agencies, industry, academic interests, and the 9 regional bridge & pavement preservation partnerships.

6. Emulsion Task Force (ETF)

7. ETF - Background
Idea conceived at AEMA-ISSA-ARRA meeting February 2008 under guidance of Jim Sorenson, FHWA
Identified need for industry expertise and involvement in ongoing research activities
pertaining to asphalt emulsions and finished product systems
First meeting in Newport Beach, CA April 7-8, 2008

8. Encourage Adoption of Uniform National Standards
EFT - Original Scope Deliverables
Advance the Effort to Develop Performance Based Methods & Specification for Emulsions
Protocols for design
Protocols for performance
Protocols for inspection & acceptance
Encourage Adoption of Uniform National Standards

9. ETF - Subcommittees Emulsion Testing & Residue Recovery Methods
Arlis Kadrmas- Chair
Residue Tests
Gayle King- Chair
Note: Subcommittees Combined as of March 2010
Arlis Kadrmas to chair combined group

10. ETF - Subcommittees Aggregates, Mix Design, and Performance Tests
Mary Stroup-Gardiner- Chair
Approved Supplier Certification
Roger Hayner- Chair
Inspection & Acceptance
Colin Franco- Chair
Tack Coat Review (Formed 7/26/10)
Chris Abadie- Chair
Recycling Emulsions ( NEW)

11. AASHTO Submittals - Deliverables
Four Standards submitted to AASHTO for Adoption
Standard Practice for Certifying Suppliers of Emulsified Asphalt
Recovering Residue from Emulsified Asphalt using Low Temperature Evaporative Techniques – AASHTO TP-72
Determining Asphalt Binder Bond Strength by Means of the Bitumen Bond Strength Test (BBS)
Performance-Graded Asphalt Binder for Surface Treatments (Surface Performance Graded (SPG) Spec)

12. AASHTO Submittals – Deliverables (cont.)
6 Test methods for chip seals submitted to AASHTO SOM
Note: Test methods developed and compiled by P.I S.Shuler through NCHRP 680

13. Experimental Approach (Initial Strawman) – for E/SPG
Purpose
Purpose
Test
Test
Conditions
Conditions
Report
Report
Residue Recovery
Residue Recovery
Forced Draft Oven
Forced Draft Oven
24 +
24 + ü ü
% Residue
% Residue 24 24 C C
Tests on Residue from Forced Draft Oven
Tests on Residue from Forced Draft Oven
High Temperature
DSR
DSR - -
MSCR
MSCR T T ü ü J J h h nr nr
DSR freq sweep
DSR freq sweep T T ü ü
G* & phase angle
G* & phase angle h h
Polymer Identifier
Polymer Identifier
DSR
DSR - -
MSCR
MSCR T T
@3200 Pa
@3200 Pa ü ü
% Recoverable
% Recoverable h h
(Elasticity/Durability)
(Elasticity/Durability)
Strain
Strain
High Float Identifier
High Float Identifier
DSR
DSR – – T T ü ü
Test to be
Test to be h h
(Bleeding)*
(Bleeding)*
non
non - -
linearity
linearity
developed
developed
Tests on PAV after Forced Draft Oven Residue
Tests on PAV after Forced Draft Oven Residue
Low Temperature
Low Temperature
DSR freq sweep
DSR freq sweep
10 & 20
10 & 20 C C ü ü G* G*
(Aged Brittleness)*
(Aged Brittleness)*
Model low T
Model low T ü ü
Phase Angle
Phase Angle
Polymer Degradation
Polymer Degradation
DSR
DSR - -
MSCR
MSCR T T
@3200 Pa
@3200 Pa ü ü
Recoverable Strain
Recoverable Strain h h
(Before/After PAV)*
(Before/After PAV)*
Ratio
Ratio
Bending Beam Rheometer

14. Emulsion Use and Performance Survey
Survey of PP Treatments
Emulsion Product/System Survey Evaluation
Conducted by Andrew Hanz of Univ. Wisconsin Madison and Colin Franco of RIDOT
Updated prior survey format and submitted to ETF
Identify/prioritize widely used applications
Define 2 critical distresses and mechanism of failure for priority application
Determine testing needs
Existing Tests which are applicable
Research or new tests needed

15. ETF Survey Results Top Product Usage Priority
Chipseals= 100%
Tack Coat= 66.7%
Microsurfacing= 62%
Modes of Failure Defined- e.g: Chipseals
Chip Loss
Bleeding
Binder Cracking (Reflective or Environmental)
Underlying Mechanisms Identified
Existing Tests Available- 84% Yes

16. AASHTO Construction Specification J.T.F.
AASHTO has Commissioned a Joint Task Force (S.O. Maintenance, S.O. Construction, and Comp) to work on the construction guide specifications for all emulsion treatments.
Larry Galehouse – was instrumental in getting this going – working with AASHTO COMP, S.O. Maintenance, and S.O. Construction

17. Best Practices Document (draft)
Accomplishments- Pre 2013
Best Practices Document (draft)
Original deliverable for Chip Seals and Micro Surfacings.
Low Temperature Residue Recovery Method
Plan for Inter-lab Study and data collection (ongoing) TP 72
Precision and bias study with AMRL for TP 72

18. ETF Reenergized Mission - 2013
Advance the Effort to Develop Performance Based Methods & Specification for Emulsions
Encourage Adoption of Uniform National Standards
Develop AASHTO STDs for all the Emulsion Treatments (listed on next slide)
Materials Specs
Test Methods
Design Practices
Construction Guide Specs
Develop QA protocols and standards for all Emulsion Treatments

19. ETF Reenergized Mission- Post 2013, Treatments Requiring Specs
Chip Seal
Micro Surfacing
Tack Coat
Fog Seal
Scrub Seal
Sand Seal
Slurry Seal
Foam Asphalt Stabilization
Thin Bonded Surface Treatment
Cold Mixes
Virgin
Recycled
CIR

20. Accomplishments, 2015, Emulsion Binder Specifications
M 140, Published Fall 2016
M 208, Published Fall 2016
M-316, Published Fall 2016
All new AASHTO Standards

21. Construction Guide Specs Emulsion Binder Standards
Accomplishments – Emulsion Treatment Standards
Status: AASHTO Emulsion STDs
AASHTO STANDARDS
Emulsion Treatments
M / MP
T / TP R
W/ SOM
Comments
Construction Guide Specs
Best Practices
Chip Seal
MP27-16
PP82-16 
NCHRP 14-37
Microsurfacing
MP28-16
PP83-16 
Tack Coat
 MP-XX*
 PP93-18
Fog Seal
MP33-17
 PP88-17
Scrub Seal
 Y**
PP91-18
Sand Seal
 MP34-18
PP90-18
Slurry Seal
MP32-17
PP87-17 
Foam Asphalt Stabilization
Bonded Surface Treatments (Nova Chip)  ü
2018 
Cold Recycled Mixtures
MP31-17 
PP86-17 
NCHRP 9-62
Legend
Emulsion Binder Standards
W/TRB
M=Material Specs
Emulsified Asphalt
M140-16
T=Test Methods
Cationic Emulsified Asphalt
M208-16
R=Design Practices
Polymer-Modified Cationic Emulsified Asphalt
M316-16
P=Provisional
Emulsion/Surface Performance Grades (E/SPG)
NCHRP
9-63
ü=Draft STD Submitted to SOM
Y**=Tabled by ETF

22. Next Steps-Short Term Plan
Complete drafting of AASHTO standards for remaining emulsion treatments
Develop QA protocols for emulsion treatments starting with microsurfacing and chip seals
Complete Draft of E/SPG Specifications
Chip Seal QA Std. Completed

23. QA – Holistic Approach for all Emulsion Treatments
National Accepted Standards
Materials Specs, Test Methods, Design Practices,
Construction Specs, etc
Materials QA:
Acceptance Testing (Agency)
QC - Quality Control (Contractor)
IA - Independent Assurance (Agency)
New Process / Product Acceptance Procedures
Materials Certification:
Agency Acceptance Plans
QC Plans (Contractor)
Vendor Supplied Material Certifications
Workmanship QA:
Equipment Calibration
Construction Process Checks

24. QA – Holistic Approach (cont.)
Education, Training, and Certification:
Define the training needs for Agency / Contactor Staff
Education and Training Resources, NHI, TCCC, and Industry
Certification Program for Contractor / Agency Field Staff
Note: National Center for Pavement Preservation is taking the lead on education and training. WRAPP is helping.

25. Development of SPG Specification for Emulsions using Superpave Principles
SWG Chair, Mike Voth of FHWA is leading this effort
Research and field studies being used for SPG development:
TxDOT – Chip seals, Darren Hazlett with Dr. Amy Epps
NCHRP project 9-50 – Dr. R. Kim at NC State
Federal Lands Chip Seal research by Dr. Gayle King
Note 1. PG - Surface Performance Graded
Note 2. This work will supplement the TxDOT SPG spec currently at the AASHTO SOM.

26. Development of SPG Specification for Emulsions using Superpave Principles Plans for 2018
Develop a draft specification for review by the ETF – To complete review by 2018.
Conduct field trials using the specification. TXDOT has already conducted trials with their spec.
Finalize the spec for review by AASHTO in 2019??
NCHRP Project 9-63 will validate E/SPG Spec. Note:draft ETF spec is part of the proposal.

27. Draft E/SPG Specification (Example)

28. Successfully Initiated Research:
ETF Research
Successfully Initiated Research:
NCHRP 14-37: Construction Spec for Chip Seal, Microsurfacing, Fog Seal
NCHRP 9-62: Cold Recycling Mixtures
NCHRP 9-63: Emulsion Performance Grading
Problem Statements 2019
Construction Guide Specs – Slurry Seals and Tack Coats
Emulsion based rejuvenating seals
Proposal to FHWA Office of Innovation for emulsion

29. Promoting the Use of Emulsions
- Need a comprehensive Plan -
Now that the AASHTO Standards exist for most emulsion treatments, we now need to:
Develop a marketing plan/marketing tools
Promote the technology to
Agencies
Industry
Academia – create course curricula
How will this be done?
Regional PP groups
AASHTO SO Mat, SO Maint, SO Hwy Design,
AEMA-ISSA-ARRA meetings/conferences.
= Subcommittee needed !!!!!? =

30. Champion of the Pavement Preservation Movement
Acknowledgements
Jim Sorenson
Champion of the Pavement Preservation Movement

31. Questions… ?