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

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

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

3. ETG & ETF – Founding Father Jim Sorenson

4. ETF - Formation PAVEMENTPRESERVATIONEXPERTTASKGROUP (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. Bridge Preservation Partnership Bridge Preservation Partnership Bridge Preservation Partnership Bridge Preservation Partnership ETF Formation ETF now part of AASHTO TSP2 9 Regional Bridge & Pavement Preservation Partnerships

7. 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 ETF - Background

8. 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 EFT – Original Mission

9. 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. ETF - Organization Current Subcommittees (2013 – Present) • Marketing • Larry Tomkins - Ergon • Rejuvenators • Hassan Tabatabaee – Cargil • Research • Darren Hazlett – UT Austin • Residue Recovery and Testing • ArlisKadrmas (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

11. AASHTO – Deliverables (Pre 2013) Four Standards submitted to AASHTO for Adoption Standard Practice for Certifying Suppliers of Emulsified Asphalt Recovering Residuefrom Emulsified Asphalt using Low Temperature Evaporative Techniques – AASHTO TP-72 Determining Asphalt Binder Bond Strengthby Means of the Bitumen Bond Strength Test (BBS) Performance-GradedAsphalt 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. 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 % Residue % Residue 24 hrs @ambient + 24 hrs @ambient + ü ü 24 hrs @60 24 hrs @60 º º C C Tests on Residue from Forced Draft Oven Tests on Residue from Forced Draft Oven High Temperature DSR DSR - - MSCR MSCR T T J J ü ü h h nr nr DSR freq sweep DSR freq sweep T T G* & phase angle G* & phase angle ü ü h h Polymer Identifier Polymer Identifier DSR DSR - - MSCR MSCR T T @3200 Pa @3200 Pa % Recoverable % Recoverable ü ü h h (Elasticity/Durability) (Elasticity/Durability) Strain Strain High Float Identifier High Float Identifier DSR DSR – – T T Test to be Test to be ü ü 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 G* G* º º ü ü (Aged Brittleness)* (Aged Brittleness)* Phase Angle Phase Angle Model low T Model low T ü ü Polymer Degradation Polymer Degradation DSR DSR - - MSCR MSCR T T @3200 Pa @3200 Pa Recoverable Strain Recoverable Strain ü ü h h Ratio Ratio (Before/After PAV)* (Before/After PAV)* Bending Beam Rheometer

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

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. 2018. • 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 TreatmentsTreatments Requiring Specs A) • 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 B) Existing Emulsion Binder Specs Revision to AASHTO M140, M208, M316

21. Emulsion Binder SpecsRevamped & Revised • M 140, Published Fall 2016 • M 208, Published Fall 2016 • M-316, Published Fall 2016

22. Accomplishments – Emulsion Treatment Standards Status: AASHTO Emulsion STDs (2019)

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… ?