(final report) doubra charles ambaiowei, ph.d. technical

Harmonizing Ontario’s HMA Specifications

(Final Report)

Doubra Charles Ambaiowei, Ph.D.Technical Director

Ontario Asphalt Pavement Council (OAPC – Council of ORBA)

Partners in Quality Road Tour, 2019.

Presentation Outline

o Recap: Present Concerns and Solutions

o Why Harmonize?

o Evaluation Focus

o Review Focus Areas

o Concerns and Findings

o Conclusion

o Progressive Steps

o Next Steps

Recap: Present Concerns

Recap: Solutions

Why Harmonize?

Evaluation Focus

Mix DesignMarshall

SuperpaveSMAWMA

RAP USAGEAllowed

RAP PercentageSurface/Binder

PGAC SpecificationPG 58-28

PMADENT/EXBBR

MSCRRecovered PGAC

HMA Acceptance CriteriaAC ContentGradation

Compaction

Tack Coat SpecificationTypes

Application Practices

Review Focus Areas

Northern Ontario Zone 1

Eastern Ontario Zone 2

Southern Ontario Zone 3

City of Greater Sudbury City of Kingston Leeds & Greenville

Regional Municipalities of:Durham, Halton, Niagara, Peel,

Waterloo & York

City of Timmins Municipality of TweedTown of Greater Napanee

City of Burlington, City of Guelph,City of Hamilton, City of Kitchener,City of London, Town of Oakville,

Township of North Dumfries

City of Thunder Bay City of BrockvilleUnited Counties of Prescott & Russell

City of Markham, City of Mississauga,City of Sarnia, City of Stratford,

City of Toronto, City of Vaughan

City of OttawaThe Counties of Stormont-Dundas-Glengarry

City of Woodstock, County of Lanark,County of Wellington, Kawartha Lakes

City of Peterborough,County of Peterborough, and

Town of Gananoque

Lambton County, Norfolk County,City of Oshawa, County of Prince Edward,

Tay Valley Township, Tillsonburg, Township of Wellesley, Township of

Wilmot, Township of Uxbridge, Town of Whitby, and City of Windsor.

Concerns & Findings: Mix Design

Consensus Requirements:o Increasing Asphalt Cement Content

o Use of Recycled Material

o Mixing and Compaction Temperatures

o Production Technologies

o Use of Additives

o Proportioning Mineral Fillers

o Use of Distinct Specifications - WMA

Concerns & Findings: RAP Usage

o Premature Cracking

o Limitations to RAP Use

o Additional Test Requirements

o Environmental & Economic Consequences

Concerns & Findings: PGAC Specifications

o Acceptance and Rejectable Criteria

o Inconsistencies with Test Procedures

o AC/Binder Literacy

Concerns & Findings: HMA Acceptance Criteria

o Need for Adequate QC/QA Practices

o Sampling Methods

o Acceptance Plans

o Imposed Penalties on non-conformance

Concerns & Findings: Tack Coat Specification

Specified Types:o SS-1 Emulsified Asphalto SS-1H Emulsified Asphalto MS-1

Application Practices – Generally in Accordance with OPSS 310 (MUNI)/1103, 308 or SP:

o Milled Surfaceso Padded Surfaceso Paved Surfaces

Conclusion

The goal of harmonization is to eliminate specification proliferation.

o Selecting Criteria Impacting on Mix Volumetrics and Density Requirements

o Rationale for Selecting Test Procedures, Setting Criteria and Limits

o Personnel Training

o Strong Commitment from ALL Stakeholders

Progressive Steps

o Continue to Engage with Specifiers, Producers and Paving Contractors on Ways to Achieve Durable HMA Pavements.

Progressive Steps

o Producing Uniform and Consistent Mix

Next Steps

Continue to Engage with Stakeholder(s) for purposes of getting paving right in Ontario.

o MTO Consultations & Partnering Sessionso OGRA/MEA Consultations & Partnershipso A.O.R.S Consultations & Partnerships

THANK YOU FOR LISTENING