1. TSP2 - ETF Meeting ETF Indianapolis, IN June 12-13, 2019
By: Colin A. Franco, P.E.
Assoc. Chief Eng.
RIDOT

2. Emulsion Task Force (ETF) History and Status Update
AASHTO TSP2
History and Status Update
2008-Present

3. ETG & ETF – Founding Father
Jim Sorenson

4. PAVEMENT PRESERVATION EXPERT TASK GROUP
ETF - 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”

5. Emulsion Task Force (ETF)

6. Preservation Partnerships
ETF Formation
ETF now part of AASHTO TSP2
Bridge Preservation Partnership
9 Regional
Bridge & Pavement
Preservation Partnerships

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 updating the state of the practice and participating in ongoing research activities pertaining to asphalt emulsions and finished product systems
First meeting in Newport Beach, CA April 7-8, 2008

8. Const & Matls Specs, Design Practice, Tests etc
EFT – Original Mission
Advance the Effort to Develop Performance Based Methods & Specification for Emulsions
Encourage Adoption of Uniform Performance Based National Standards
Const & Matls Specs, Design Practice, Tests etc
QA Protocols for Materials and Workmanship

9. Current Membership (2013 – Present)
ETF - Organization
Current Membership (2013 – Present)
Co-Chair- Colin Franco RIDOT
Co-Chair- Chris Lubbers - Kraton Polymers
Members From:
- Industry: AEMA/ ARRA/ ISSA/FP2
- Academia: ChicoSU/ Tx A&M/ NC State
- State DOT’s: TX, RI, MT, ME, IL
- FHWA
- National Center Pavement Preservation (NCPP)

10. Current Subcommittees (2013 – Present)
ETF - Organization
Current Subcommittees (2013 – Present)
Residue Recovery and Testing
Arlis Kadrmas (Chair) BASF - AEMA
Design Group
Spray – Gary Hicks (Co-chair) - CSU
Mix – Jim Moulthrop (Co-chair) - Fugro FP2
Supplier Certification and QA
Larry Galehouse ( Co Chair ) - NCPP
Colin Franco (Co-Chair) - RIDOT
Recycling Emulsions
Steve Cross - OK State U
SWG (Special Working Group)
Mike Voth (FHWA Lands) - Cood the EAPG and other emulsion binder specifications among all the subcommittee & among treatments
Marketing
Larry Tomkins - Ergon
Rejuvenators
Hassan Tabatabaee – Cargil
Research
Darren Hazlett – UT Austin

11. AASHTO – Deliverables (Pre 2013)
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 – Deliverables (Pre 2013)
6 Test methods for chip seals submitted to AASHTO SOM
Design Group is completing review.
Note: Test methods developed and compiled by Scott Shuler through NCHRP 680

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

14. Accomplishments – Draft EAPG Spec (Pre 2013)
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

15. Survey of PP Treatments
Accomplishments -
Emulsion Use and Performance Survey -Pre 2013
Survey of PP Treatments
Emulsion Product/System Survey Evaluation
Conducted by Andrew Hanz of Univ. Wisconsin Madison
Identify/prioritize widely used Treatments
Define 2 critical distresses and mechanism of failure for priority Treatments
Determine testing needs
Existing Tests which are applicable
Research or new tests needed

16. ETF Reenergized Mission - 2013
Advance the Effort to Develop Performance Based Specification for Emulsion Binders (EAPG) by Special Working Group ( SWG).
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
Research

17. Development of EAPG Specification for Emulsions using Superpave Principles
SWG -Chair Mike Voth of FHWA is leading this effort
Research and field studies being used for EAPG spec 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. EAPG – Emulsion Asphalt Performance Graded
Note 2. This work will supplement the TxDOT SPG spec currently at the AASHTO SOM.

18. Development of EAPG Specification for Emulsions using Superpave Principles
Draft EAPG specification reviewed by the ETF – Dec
Draft EAPG forwarded for review by AASHTO COMP –Dec 2018
NCHRP Project 9-63 will validate EAPG Spec. Draft ETF spec was part of the proposal.
May 1, 2019, Project signed with AI
NOTE: TXDOT has conducted field trials with their SPG spec.

19. Draft E/SPG Specification (2018)

20. AASHTO Standards for Emulsion Treatments Treatments Requiring Specs
Chip Seal
Micro Surfacing
Tack Coat
Fog Seal
Scrub Seal
Sand Seal
Slurry Seal A)
Foam Asphalt Stabilization
Thin Bonded Surface Treatment
Cold Mixes
Virgin
Recycled
CIR
B) Existing Emulsion Binder Specs Revision to AASHTO M140, M208, M316

21. Emulsion Binder Specs Revamped & Revised
M 140, Published Fall 2016
M 208, Published Fall 2016
M-316, Published Fall 2016

22. Construction Guide Specs Emulsion Binder Standards
Accomplishments – Emulsion Treatment Standards
Status: AASHTO Emulsion STDs (2019)
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
MP28-17
PP83-16 
Tack Coat
 MP36-18
 PP93-18
NCHRP 14-43
Fog Seal
MP33-17
 PP88-17
Scrub Seal
  ü
PP91-18
Sand Seal
 MP34-18
PP90-18
Slurry Seal
MP32-17
PP87-17
NCHRP 14-43 
Foam Asphalt Stabilization
 NP38-18
Bonded Surface Treatments (Nova Chip)  ü
2018 
Cold Recycled Mixtures
MP31-17 
PP86-17 
NCHRP 9-62 / D-07
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

23. AASHTO JTF-Construction Specification
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.
Note: Larry Galehouse ( NCPP)– was instrumental in setting this up– working with AASHTO COMP, S.O. Maintenance, and S.O. Construction

24. QA Protocols and Standards
Develop QA protocols for emulsion treatments starting with microsurfacing and chip seals
Education, Training, Certification
Chip Seal QA Std. Completed
Microsurfacing QA in Progress, on going

25. QA – Holistic Approach for all Emulsion Treatments
National Accepted Standards
Materials Specs, Test Methods, Design Practices,
Construction Specs, etc
QA Program – Materials and Workmanship:
Acceptance Testing (Agency)
QC - Quality Control (Contractor)
IA - Independent Assurance (Agency)
NTPEP: Manufacturer Audits
Workmanship QA
Equipment Calibration
Construction Operation Quality Plan
Personnel Certification
MaterialsCertification
Agency Acceptance Plans
QC Plans (Contractor)
Vendor Supplied Material Certifications
Agency Calibration Monitoring Checklist

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

27. ETF – Research Initiatives
NCHRP – Ongoing/Completed research projects submitted by ETF
14-37 Construction guide specs for Chipseal, Microsurfacing and Fog seal. - Completed
20-50(18)- CIR, FDR and CCPR reclamation specifications and test methods. - Ongoing
9-63 Performance Grade Specification for Emulsion Binders. -Ongoing
NCHRP: New research proposals status:
Rejuvenating Sealers in Emulsions – Not Accepted
Construction Guide Specs- Tack coat and Slurry seals; (NCHRP 9-44)
Construction Guide Specs for CIR; (NCHRP 9-43)
FHWA Research Proposal
Proposal for implementation of emulsion treatments using new AASHTO standards, forwarded for consideration by FHWA Implementation and Innovation programs.
EAPG- Limited Validation Testing
AI Coordinating Program

28. ETF – Marketing & Implementation
As a result of production of AASHTO Standards and Guides the efforts of the ETF have turned towards marketing and implementation. A marketing subcommittee has been formed and is working on a plan of action.
The plan will consider the following;
stakeholders
users of the standards and guides (Federal agencies, State Dot’s, Local Agencies and Transportation officials)
Emulsion suppliers and contractors
The message that must be consistent, simple and concise inclusive of all products using emulsion

29. ETF – Rejuvenators in Emulsions
Subcommittee formed in 2018
Topical use of rejuvenators in emulsions
Rejuvenator spec reviews

30. Questions… ?