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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