Annual Pavement Forum 2020November 18th & 19th

Welcome

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Time Topic1:00 – 1:05 Justin Moderie Welcome

1:05 – 1:25 Chris Duman Pilot Project Updates

1:25 – 1:40 Jim Gunter Grade Sampling

140: – 1:55 Erdem Coleri Research Update

1:55 – 2:00 Break2:00 – 2:15 Mike Stennett Certification / Quality Assurance Update

2:15 – 2:35 Tim Earnest 2020 Pavement Preservation

2:35 – 2:45 Chris Duman Liquid Anti-Strip vs Lime/Latex

2:45 – 2:55 Tim Earnest Changes to Smoothness

2:55 – 3:00 Justin ModerieKelly Warren

Q&A / 2nd Day

Agenda

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Our Presenter’s

ODOT State Pavements Engineer

ODOT State Pavement Materials & Quality Engineer.

ODOT Pavement Quality Specialist

OSU Civil & Construction EngineeringAssociate Professor

Justin Moderie Chris Duman Jim Gunter Erdem Coleri, Ph.D.

Our Presenter’s

ODOT Senior Quality Assurance Engineer

ODOT Assistant Pavement Materials Engineer

ODOT Assistant Pavement Quality Engineer

Mike Stennett Tim Earnest Kelly Warren

2020/2021ACP Pilot Project Overview

ODOT Paving Forum – Virtual18 November 2020

Chris Duman – State Pavement Quality & Materials Engineer

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Background

• FHWA / Texas Transportation Institute

• Multi-year effort

• Paving industry collaboration

Source: NCAT

Density / Permeability Relationship

Prior to 2020

• Blind Random Density (2017+)

• Individual Density Tests - 91.5% LSL (2018+)

• +/-0.35% Asphalt Content Tolerance(2018+)

New in 2020

• Maximum ACP lot size

• Individual Density – 92.0% LSL for select projects*

• Blind Random Mix Sampling

What are the results?

Density Standard DeviationPrior to 2018 93.5% 1.15

2018/2019 91.5% LSL* 93.6 1.0

2020 - 91.5% LSL 93.9% 1.05

2020 - 92.0% LSL 94.1% 0.85

Continuing/New for 2021

• Individual Density – 92.0% LSLw/ 91.5% penalty to limit risk

• Maximum Lot size

• Standard Spec. Change - >20,000 tons/project

• Blind Random Mix Sampling

Blind Random Density

• Agency Located

• Overall a success – a few issues

• Look for more guidance from Pavement Services

+/-0.35% Asphalt Content Tolerance

• Generally similar control

• Has triggered more 3rd party& more JMF target changes

• Also moving into Standard Specs for large projects

Maximum Lot size

• 10k tons lots, 20k max for final lot on project

• Only 1 project in 2020 - more in 2021

• Emphasis on control for entire project

Items For Resident Engineer Office Consideration

• Most of the burden is on the ContractorBlind Random Density being an exception

• Pavement Services is here to assist

• Results to date indicate improvement

Thank you for your help – and your patience

ACP Blind Random Sampling ReviewJim Gunter - Pavement Quality Specialist

Blind Random Field Sampling

• Similar reasoning and setup as the Blind Random Density Testing• Transitions the sampling from the Production Facility to the

Laydown Location• Contractor doesn’t know when the samples are to be taken• Should ensure any potential bias from the facility having knowledge

of when a sample is coming

Blind Random Field Sampling

• Agency to develop the Random Sample Tonnages prior to production• Three allowable sample locations in the field – Auger, Windrow, or

Behind the Paver• Contractor to get location, process, and personnel approved by the

Engineer prior to start of paving• Any change to location, process, or personnel must be approved by the

Engineer• Contractor needs to have personnel available to take samples when

directed ( within 15 minutes)

Blind Random Field Sampling

• Contractor to sample and split the sample on the grade• Contractor to provide backup sample to Agency• Agency to retain backup samples until appropriate time when they

can be discarded

The First ProjectOR58: Goshen – Pheasant Lane• Contractor choose to sample from the Auger and met with Agency

personnel on a trial project to go over the procedures and get the technician approved.

• A total of 28 QC samples and five QA samples were taken.• QA04 was out of verification on the #4 sieve but matched IA (Target

Change)• It was noted that the supplier and QA have a difficult time meeting IA on

the Rice test and that was not an issue with the field samples.• Contractor noted that their plant samples resulted in lower oil and p200

than the field samples

Auger Sampling –Place the shovel flat in front of the material at the auger

Auger Sampling –Lift shovel straight up and out of the material

Auger Sampling –

Place the material in sample container

Splitting the Sample in the field –

Place the material on the splitting table and thoroughly mix

Splitting the Sample in the field –

Separate into four equal quarters

Splitting the Sample in the field –

Place opposite quarters in the boxes

Splitting the Sample in the field –

Place opposite quarters in the boxes

Splitting the Sample in the field –

Place next portion of sample on the splitting table and mix

Splitting the Sample in the field –

Separate into four equal quarters and place opposite quarters in boxes

Splitting the Sample in the field –

Separate into four equal quarters and place opposite quarters in boxes

Splitting the Sample in the field –

Label boxes and collect ODOT back-ups for future testing if necessary

Chain of Custody–

Create and maintain a log for collecting ODOT samples

The Second ProjectI-84: Hinkle – Stanfield Pavement Repair

• Contractor choose to sample from the Windrow.• A total of 26 QC samples and three QA samples were taken.• QA02 was out of IA on the rice test, QC reran test and passed IA• It was noted that QA has a good record of meeting IA on the Rice

test, so there was some concern with the IA being out or at the limits – potential curing issue?

• Contractor sampled the mix at the plant at a reduced rate, but we do not know the results

Windrow Sampling–

Remove top one foot of material from the windrow

Windrow Sampling–

Insert the shovel straight down from the top

Windrow Sampling–

Roll the shovel back and lift the material straight up

Windrow Sampling–

Place material in approved container and transport to splitting location

The Second ProjectI-84: Hinkle – Stanfield Pavement Repair

• Contractor took the sample back to the lab to split. ( ~5 minutes away)• Started with the same splitting procedure as OR58: Goshen – Pheasant

Lane• Adjusted procedure to consider each box a composite sample, one

shovel full from each sample location was put in each box making a composite.

• QC and QA agreed to let there samples cool to room temperature before reheating and testing to try to mitigate any differences that cure time and temperature may cause.

Blind Random Field Sampling• The process still needs some fine tuning and fixed procedures• Based on the results from these two pilot projects, Blind Random Field Samples are viable and produce

results as good or better than the conventional process• The Contractor’s don’t feel as confident• Volumetrics on field samples• Noticable difference in oil and dust between the plant and field results• Safety, staffing concerns, and added costs• Concerned about making changes based on field results if they are incorrect• There is a committee made up of Pavement Services and Quality Assurance personnel working to get the

process ready for next season.• The Agency is working with our industry partners as we move forward with Blind Random Field Sampling

Thank you for your time

Erdem Coleri, PH.D.

Erdem Coleri received his Ph.D.

degree from the University of

California, Davis (2011)

with specialization in pavement

materials and structures.

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5 minute break

ODOT QA Staff Changes &2020-21 Inspector/Technician Certification

Mike Stennett - Sr Quality Assurance Engineer Slido #65292

Quality Assurance Personnel Changes

• Region 2 QAC Adam Rose now the Astoria QCCS• Steve Tipton formerly of Carlson Testing is now

Region 2 QAC

• Mike Stennett now the Senior Quality Assurance Engineer

Technician Certification Program

• CAgt, CAT I, CAT 2, CEBT, CDT, CMDT - Schedule through APAO• Limited class size – 8 bodies per class, includes instructor• Sign up through APAO• 1st come 1st served – sign up ASAP if you need certification

• ACI Grade 1, CCT, CQT, CSTT – Schedule through OCAPA• Same as above• Sign up through OCAPA website• 1st come 1st served – sign up ASAP if you need certification

ODOT Inspector Certification• Challenge Exams (can challenge all but ADA)

• Offered every other week through December at the ODOT Central Lab• Schedule at https://www.oregon.gov/ODOT/Forms/2ODOT/7345111.pdf

• Regions 3, 4 & 5 – Challenge Events• At Region Headquarters Buildings• Late January, February timeline• All Materials Provided for test

https://www.oregon.gov/ODOT/Forms/2ODOT/7345111.pdf

ODOT Inspector Certification• Training Formats

• Some live with limited class sizes (unless things change)• Some on-line formats

• Webinar – Live Instructor Led• Virtual Training – Self-guided

ODOT Inspector Certification

• ADA Training• Virtual Training Format (Target end of year)– No Live Training• Complete Virtual Training to qualify to test w/in 1 year @ Challenge

Event• NO Field Practical Exam due to COVID-19

ODOT Inspector Certification

• Asphalt Concrete Paving Inspection Training (ACP)• 2 Live Trainings Scheduled• Back-up to be Webinar based with PowerPoint Slide-Speaker

Note back-up• Webinar worth 1 year extension – Challenge Exam for 5 year

cert.

ODOT Inspector Certification

• Certified General Construction Inspector Training (CGCI)• 2 live trainings scheduled• Virtual Based Training Back-up – Take for 1 year Cert.

• Challenge Exam for full 5 year Cert.

ODOT Inspector Certification

• Certified Traffic Signal Inspector Training (CTSI)• 100% Virtual Training – No Live Sessions• On-line Exams still being explored• Alternative – 1 year recert, or Challenge for 5 year Cert.

ODOT Inspector Certification• Certified Bridge Construction Inspector Training (CBCI)

• 2 Live Sessions Scheduled• Certified Drilled Shaft Inspector Training (CDSI)

• 1 Live Session Scheduled• Certified Environmental Construction Inspector Training(CECI)

• 1 Live Session Scheduled

ODOT Inspector Certification

• Back-up for CBCI, CDSI & CECI Live Training will be Virtual Training

• Completion of Virtual Training Good for 1 year Recert• Challenge for 5 year Certification• Roll-out of these trainings staggered over Winter &

Spring 2021

ODOT Inspector Certification

• Erosion & Sediment Control Manager Training (ESCM)• Plan still pending• ODOT can accept on-line training from 4 Entities Listed on

DEQ’s 1200-C Permit (see below) for 1 year recert.• Challenge for the full certification

THE END

•QUESTIONS NOW or TOMORROW?

Preventive Maintenance Treatments

2020 Pavement ForumPresented By: Timothy Earnest, P.E.

November 2020 Slido #65292

Overview

• What is Preventive Maintenance• Current Toolbox• Pilot Projects• Chip Seal Performance Specification• Research

What Is Preventive Maintenance?

AASHTO Definition: The Planned Strategy Of Cost-effective Treatments To An ExistingRoadway System And Its Appurtenances That Preserves The System, Retards FutureDeterioration, And Maintains Or Improves The Functional Condition Of The SystemWithout Substantially Increasing Structural Capacity.

Applying the right treatment, to the right pavement, at the right time.

Why Preventive Maintenance?

To Keep Our Good Roads In Good Condition• Retard Future Deterioration• Extend The Service Life Of The Pavement

To Make More-informed And Cost-effective Decisions Regarding Pavement Network

• Important W/ Decreasing Resources• Proper Timing = Stretch Dollars

Preventive Maintenance

Source: NCHRP Research Report 858, 2018

Preventive Maintenance ToolboxAsphalt Surfaces

• Chip Seals • Fog Seals (Over Chip Seal Or On Old OGFC)• Crack Sealing• Single Lift ACP Inlays/Overlay• Micro Surfacing

Concrete Surfaces• Full Depth Patching & Spall Repair• Diamond Grinding• 2” Sacrificial ACP Overlay

Chip SealsBenefits

• Seal Surface• Prevent Oxidation, Future Cracking• Provides New Wearing Surface

Type• Graded vs Single-Size• Polymer-Modified Emulsion• High Float; CRS-3P• Hot Chip• Asphalt Rubber (Pilot)

Micro SurfacingBenefits

• Fill Ruts• Can Be Placed At Day Or Night• Quick Cure And Return To Traffic

Type• Type III (3/8”)• Polymer-Modified Emulsion• Mineral Fillers

More Expensive Than Chip SealPilots

Project SelectionPavement Condition

• Current Condition Rating• Current Distresses• Cause Of Distresses

Traffic Levels (AADT)Environment/ClimateTimingFunding

Cost Comparison

Chip Seal ≈ $40k/lm

Micro Surfacing ≈ $60k/lm

Asphalt Rubber Chip Seal ≈ $150k/lm

Chip Seal Performance Specification

BackgroundRequest To Bring Engineering Into Chip Seal Process Led To Research ProposalResearch Project Was Approved

Goal: Improve Chip Seal Performance In OregonCompared Current Method Spec To Performance SpecFinal Report (SPR 777) Late 2016

STIC Grant Approved In 2016Assist W/ Implementation Of Research Finding

Chip Seal Performance Specification

What It IsContractor Is Responsible For• Setting Application Rates• Placing And Finishing Chip Seal• Repairing Failures• Meeting Or Exceeding Performance

Measurement (Macro Texture)

Chip Seal Performance Specification

What It Is (Cont.)Inspector Role Becomes That Of An Observer • No Longer Directing Rates Or Methods• Materials, Equipment, And Construction Quality ControlInspections• Initial: 2 Weeks Post-construction• Final: 1 Year Post-constructionIncentive/Disincentive Based Upon Performance Measurement

Chip Seal Performance Specification

Why Is It Important?• Transfer Agency Risk When Failure Occurs To Contractor• Improve Cost Effectiveness Of Chip Seals By Increasing Performance• A Rational Method For Evaluating:

• Emulsion And Aggregate Application Rates• Expected Service Life

• Encourage Innovation In Materials And Construction

Chip Seal Performance Specification

Where we arePilot ProjectWorking On Getting Spec Approved

Where we want to beContractor CertificationAlternative Bid Process (design vs. low cost)

Research

RAP In Preventive Maintenance Treatments • Chip Seals• Micro Surfacing, Slurry Seals

Chip Seal Quality• Materials• Construction

Thank You.

Liquid Antistrip Additives in ACPODOT Paving Forum – Virtual

18 November 2020Chris Duman – State Pavement Quality & Materials Engineer

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Lime Treatment of ACP Aggregate

• “Gold Standard” for ACP stripping resistance

• Current Practice for select corridors since late 1990sLatex polymer in lower risk areas

• JMF approval based on AASHTO T283 (TSR)

Challenges of Lime Treatment

• Construction problemsSupplyFeed issuesExcess Dust

• Assurance• Environmental and Worker Health• Cost

Liquid Anti-Strip Additives (LASA)

• Have been allowed if needed for all mixes00745.11(b)

• Not allowed as replacement for Lime/Latex

• Many products on the marketSome also are chemical Warm-mix Additives

Challenges of LASA

• Determine effectiveness of the productScreening by NTPEP

• Determine effectiveness and rate for the JMFHamburg testing at the Central Lab

• Assure correct addition into liquid asphaltAt asphalt cement terminal

Project Selection for LASA

• Targeting lower risk projects – primarily with latex option

• Work with Pavement Design to consider specific risks

Current Use of LASA as Lime Replacement

• US97: Willowdale – Madras• Used a Special Provision

• Multiple projects in 2020(and earlier) as CCO

• 2021 as a Special Provision for select projects

Future of LASA• Targeting lower risk projects/areas – primarily with latex option

• Work with Pavement Design to consider specific risks

• Improve current specification

• Evaluate field performance

Thank You!

2021 IRI Smoothness Specification Changes

2020 Pavement ForumPresented By: Timothy Earnest, P.E.

November 2020 Slido #65292

00755 & 00756 Specification Overview

• Evaluated using International Roughness Index (IRI), no longer Profile Index (PI)

• Language similar to 00745 IRI Specification• Same test methods

• ODOT TM 769 - Profiler Certification• ODOT TM 772 - Determining IRI

00755 & 00756 Specification Details

• Still require a test strip to show smoothness can be attained**Engineer may waive according to 00755.47

• Now require daily surface tests to show – 00755.55(b)(1)(a)• Average IRI of 65.0 in/mi or less• 0.1 mile of 95.0 in/mi or less

• Otherwise, discontinue paving and construct test strip

00755 & 00756 - Excluded Areas

00755 & 00756 – Smoothness Corrections

• Subject to corrective action• Localized roughness = 160.0 in/mi over 25 ft.• 0.1 mile segments over 95.0 in/mi

• Corrections by Diamond Grinding or Remove & Replace• Pavement Thickness may have to be checked following Grinding

• Depends on sticking measurements

00755 & 00756 Smoothness Price Adjustment

• Average of wheel paths is at, or below 60.0 in/mi• Change: each wheel path at 65.0 in/mi or less

• No Smoothness Bonus in Areas requiring Corrective Grinding• Contractor can reduce or eliminate disincentive

00745 IRI Smoothness Boilerplate Changes

• 00745.02• Localized roughness = 160 in/mi over 25 ft. (previously 140 in/mi)

• 00745.75(c)• Evaluate areas of localized roughness 160.0 – 189.9 in/mi and

partial segments w/ average > 95.0 in/mi to determine if corrective action is necessary.

• All .1 mile segments > 95.0 in/mi & localized 190.0 in/mi or more require corrective action

00745 IRI Smoothness Boilerplate Changes

• 00745.96(b) – Price Adjustments• Contractor is no longer eligible for incentive in segments containing

localized roughness, whether selected for correction or not • Contractor can retest and reduce or eliminate disincentive

Thank You.

Day 2 - November 19th

1:00PM – 2:00PM

Add questions for consideration to Slido #65292

Those who want to leave now, may. We will stay late today for additional questions and will provide a summary of those discussions during tomorrow’s meeting.

Annual Pavement Forum 2020WelcomeAgendaOur Presenter’sOur Presenter’s2020/2021� ACP Pilot Project OverviewBackground Density / Permeability RelationshipPrior to 2020New in 2020What are the results?Continuing/New for 2021Blind Random Density+/-0.35% Asphalt Content ToleranceMaximum Lot sizeItems For Resident Engineer Office ConsiderationThank you for your help – and your patience ACP Blind Random Sampling ReviewBlind Random Field SamplingBlind Random Field SamplingBlind Random Field SamplingThe First Project�OR58: Goshen – Pheasant LaneAuger Sampling – �Place the shovel flat in front of the material at the augerSlide Number 24Slide Number 25Slide Number 26Slide Number 27Slide Number 28Slide Number 29Slide Number 30Slide Number 31Slide Number 32Slide Number 33Slide Number 34The Second Project�I-84: Hinkle – Stanfield Pavement RepairSlide Number 36Slide Number 37Slide Number 38Slide Number 39The Second Project�I-84: Hinkle – Stanfield Pavement RepairBlind Random Field SamplingSlide Number 42Erdem Coleri, PH.D.Slide Number 44ODOT QA Staff Changes &�2020-21 Inspector/Technician CertificationQuality Assurance Personnel ChangesTechnician Certification ProgramODOT Inspector CertificationODOT Inspector CertificationODOT Inspector CertificationODOT Inspector CertificationODOT Inspector CertificationODOT Inspector CertificationODOT Inspector CertificationODOT Inspector CertificationODOT Inspector CertificationTHE ENDPreventive Maintenance TreatmentsOverviewWhat Is Preventive Maintenance?Why Preventive Maintenance?Preventive MaintenancePreventive Maintenance ToolboxChip SealsMicro SurfacingProject SelectionCost ComparisonChip Seal Performance SpecificationChip Seal Performance SpecificationChip Seal Performance SpecificationChip Seal Performance SpecificationChip Seal Performance SpecificationResearchSlide Number 74Liquid Antistrip Additives in ACPLime Treatment of ACP AggregateChallenges of Lime TreatmentLiquid Anti-Strip Additives (LASA)Challenges of LASAProject Selection for LASACurrent Use of LASA as Lime ReplacementFuture of LASAThank You!2021 IRI Smoothness Specification Changes00755 & 00756 Specification Overview00755 & 00756 Specification Details00755 & 00756 - Excluded Areas00755 & 00756 – Smoothness Corrections00755 & 00756 Smoothness Price Adjustment00745 IRI Smoothness Boilerplate Changes00745 IRI Smoothness Boilerplate ChangesSlide Number 92Day 2 - November 19th