E mulsion T ask F orce (ETF) - PowerPoint Presentation

Slide1

E

mulsion

T

ask

F

orce (ETF)

AASHTO TSP

2

Indianapolis, IN

Nov 28-29, 2018

By: Colin A. Franco, P.E.

Assc

. Chief Eng.

RIDOT

Slide2

ETG & ETF – Founding Father

Jim Sorenson

Slide3

PAVEMENT PRESERVATION EXPERT TASK GROUP (PPETG)

Established in 1991 by FHWA / Jim SorensonPromote the institutionalization of the concepts of pavement preservationParent group of “Emulsion Task Force”

ETG - Formation

Slide4

8 Regional

Bridge & Pavement

Preservation Partnerships

Bridge Preservation Partnership

Bridge Preservation Partnership

Bridge Preservation Partnership

Bridge Preservation Partnership

Slide5

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.

Mission

PPETG

Slide6

E

mulsion

T

ask

F

orce

(

ETF

)

Slide7

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

ETF - Background

Slide8

Advance the Effort to Develop Performance Based Methods & Specification for Emulsions Protocols for design Protocols for performanceProtocols for inspection & acceptanceEncourage Adoption of Uniform National Standards

EFT - Original Scope Deliverables

Slide9

Emulsion Testing & Residue Recovery MethodsArlis Kadrmas- ChairResidue TestsGayle King- ChairNote: Subcommittees Combined as of March 2010 Arlis Kadrmas to chair combined group

ETF - Subcommittees

Slide10

Aggregates, Mix Design, and Performance TestsMary Stroup-Gardiner- ChairApproved Supplier CertificationRoger Hayner- ChairInspection & AcceptanceColin Franco- ChairTack Coat Review (Formed 7/26/10)Chris Abadie- ChairRecycling Emulsions ( NEW)

ETF - Subcommittees

Slide11

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)

Slide12

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

Slide13

Experimental Approach(Initial Strawman) – for E/SPG

Purpose

Test

Conditions

Report

Residue Recovery

Forced Draft Oven

24 hrs @ambient +

24 hrs @60

º

C

ü

% Residue

Tests on Residue from Forced Draft Oven

High Temperature

DSR

-

MSCR

DSR freq sweep

T

h

T

h

ü

J

nr

ü

G* & phase angle

Polymer Identifier

(Elasticity/Durability)

DSR

-

MSCR

T

h

@3200 Pa

ü

% Recoverable

Strain

High Float Identifier

(Bleeding)*

DSR

–

non

-

linearity

T

h

ü

Test to be

developed

Tests on PAV after Forced Draft Oven Residue

Low Temperature

(Aged Brittleness)*

DSR freq sweep

10 & 20

º

C

Model low T

ü

G*

ü

Phase Angle

Polymer Degradation

(Before/After PAV)*

DSR

-

MSCR

T

h

@3200 Pa

ü

Recoverable Strain

Ratio

Purpose

Test

Conditions

Report

Residue Recovery

Forced Draft Oven

24 hrs @ambient +

24 hrs @60

º

C

ü

% Residue

Tests on Residue from Forced Draft Oven

DSR

-

MSCR

DSR freq sweep

T

h

T

h

ü

J

nr

ü

G* & phase angle

Polymer Identifier

(Elasticity/Durability)

DSR

-

MSCR

T

h

@3200 Pa

ü

% Recoverable

Strain

High Float Identifier

(Bleeding)*

DSR

–

non

-

linearity

T

h

ü

Test to be

developed

Tests on PAV after Forced Draft Oven Residue

Low Temperature

(Aged Brittleness)*

DSR freq sweep

10 & 20

º

C

Model low T

ü

G*

ü

Phase Angle

Polymer Degradation

(Before/After PAV)*

DSR

-

MSCR

T

h

@3200 Pa

ü

Recoverable Strain

Ratio

Bending Beam Rheometer

Slide14

Survey of PP TreatmentsEmulsion Product/System Survey EvaluationConducted by Andrew Hanz of Univ. Wisconsin Madison and Colin Franco of RIDOTUpdated prior survey format and submitted to ETFIdentify/prioritize widely used applications Define 2 critical distresses and mechanism of failure for priority applicationDetermine testing needsExisting Tests which are applicable Research or new tests needed

Emulsion Use and Performance Survey

Slide15

Top Product Usage PriorityChipseals= 100%Tack Coat= 66.7%Microsurfacing= 62%Modes of Failure Defined- e.g: ChipsealsChip LossBleedingBinder Cracking (Reflective or Environmental)Underlying Mechanisms Identified Existing Tests Available- 84% Yes

ETF Survey Results

Slide16

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

Slide17

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

Accomplishments- Pre 2013

Slide18

Advance the Effort to Develop Performance Based Methods & Specification for EmulsionsEncourage Adoption of Uniform National StandardsDevelop AASHTO STDs for all the Emulsion Treatments (listed on next slide)Materials SpecsTest MethodsDesign PracticesConstruction Guide SpecsDevelop QA protocols and standards for all Emulsion Treatments

ETF Reenergized Mission - 2013

Slide19

Chip SealMicro SurfacingTack CoatFog SealScrub SealSand SealSlurry Seal

Foam Asphalt StabilizationThin Bonded Surface Treatment Cold MixesVirginRecycledCIR

ETF Reenergized Mission- Post 2013, Treatments Requiring Specs

Slide20

M 140, Published Fall 2016M 208, Published Fall 2016M-316, Published Fall 2016All new AASHTO Standards

Accomplishments, 2015, Emulsion Binder Specifications

Slide21

AASHTO STANDARDSEmulsion TreatmentsM / MPT / TPRW/ SOMCommentsConstruction Guide SpecsBest PracticesChip SealMP27-16 PP82-16   NCHRP 14-37 MicrosurfacingMP28-16 PP83-16   NCHRP 14-37 Tack Coat MP-XX*  PP93-18   Fog SealMP33-17   PP88-17  NCHRP 14-37 Scrub Seal Y** PP91-18   Sand Seal MP34-18 PP90-18   Slurry SealMP32-17 PP87-17     Foam Asphalt Stabilization       Bonded Surface Treatments (Nova Chip) ü  ü2018    Cold Recycled MixturesMP31-17 PP86-17   NCHRP 9-62 LegendEmulsion Binder StandardsM / MPT / TPRW/TRBM=Material SpecsEmulsified AsphaltM140-16   T=Test MethodsCationic Emulsified AsphaltM208-16   R=Design PracticesPolymer-Modified Cationic Emulsified AsphaltM316-16   P=ProvisionalEmulsion/Surface Performance Grades (E/SPG)NCHRP9-63ü=Draft STD Submitted to SOMY**=Tabled by ETF

Accomplishments – Emulsion Treatment Standards

Status: AASHTO Emulsion STDs

Slide22

Complete drafting of AASHTO standards for remaining emulsion treatmentsDevelop QA protocols for emulsion treatments starting with microsurfacing and chip sealsComplete Draft of E/SPG Specifications

Next Steps-Short Term Plan

Chip Seal

QA

Std. Completed

Slide23

National Accepted StandardsMaterials Specs, Test Methods, Design Practices,Construction Specs, etcMaterials QA:Acceptance Testing (Agency)QC - Quality Control (Contractor)IA - Independent Assurance (Agency)New Process / Product Acceptance ProceduresMaterials Certification:Agency Acceptance PlansQC Plans (Contractor)Vendor Supplied Material CertificationsWorkmanship QA:Equipment CalibrationConstruction Process Checks

QA – Holistic Approach for all Emulsion Treatments

Slide24

Education, Training, and Certification:Define the training needs for Agency / Contactor StaffEducation and Training Resources, NHI, TCCC, and IndustryCertification Program for Contractor / Agency Field StaffNote: National Center for Pavement Preservation is taking the lead on education and training. WRAPP is helping.

QA

– Holistic Approach

(cont.)

Slide25

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 EppsNCHRP project 9-50 – Dr. R. Kim at NC StateFederal Lands Chip Seal research by Dr. Gayle King

Development of SPG Specification for Emulsions using Superpave Principles

Note 1. PG - Surface Performance Graded

Note 2. This work will supplement the TxDOT SPG spec currently at the AASHTO SOM

.

Slide26

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.

Development of SPG Specification for Emulsions using Superpave Principles

Plans for 2018

Slide27

Draft E/SPG Specification (Example)

Slide28

Successfully Initiated Research:NCHRP 14-37: Construction Spec for Chip Seal, Microsurfacing, Fog SealNCHRP 9-62: Cold Recycling MixturesNCHRP 9-63: Emulsion Performance GradingProblem Statements 2019Construction Guide Specs – Slurry Seals and Tack CoatsEmulsion based rejuvenating sealsProposal to FHWA Office of Innovation for emulsion

ETF Research

Slide29

Now that the AASHTO Standards exist for most emulsion treatments, we now need to:Develop a marketing plan/marketing toolsPromote the technology toAgenciesIndustryAcademia – create course curriculaHow will this be done?Regional PP groupsAASHTO SO Mat, SO Maint, SO Hwy Design, AEMA-ISSA-ARRA meetings/conferences.

Promoting the Use of Emulsions

- Need a comprehensive Plan -

= Subcommittee needed !!!!!? =

Slide30

Jim Sorenson1949-2009Champion of the Pavement Preservation Movement

Acknowledgements

Slide31

Questions…

?