R. Gary Hicks and Todd Shields TSP2 Emulsion Task Force
Good materials specifications Good design practices Qualified personnel ◦ Contractor – actually running the equipment ◦ Agency – overseeing and accepting Solid Quality Assurance ◦ QA Specifications ◦ QC Plans ◦ Agency Acceptance Protocols ◦ Independent Assurance
Treatments ments Materia rials ls Design gn Pract ctice ices Chip Seal MP 27-16 16 PP 82-16 16 Cold IN-Pl Place ace Recycl cyclin ing MP 31-17 17 PP 8 86-17 17 Fog Seal al MP 33-17 17 PP 8 88-17 17 Micro surfa facing cing MP 28-16 16 PP 8 83-16 16 Sand Seal MP 34-18 18 PP 90-18 18 Scrub ub Seal N/A PP 9 91-18 18 Slurry y Seal MP 32-17 17 PP 8 87-17 17 5
Scope Refer erenced enced Documen cuments ts Term rminology inology Significa gnificance nce and nd Use Emu mulsif lsified ied Asphalt halt Requ quiremen irements ts Aggre regat gate e Requi uirem remen ents ts Key Word rds This Photo by Unknown Author is licensed under CC BY-SA 6
Scope pe Referenced nced Docum uments nts Signif ifica icance nce and Use Evalua luati tion on of Materi rials ls Design gn Proce cess ss Determ rmini ining ng applicati ication on rates Report Keywor words ds Reference nces 7
Guide includes: Contractor Quality Control Agency Acceptance Protocols Independent Assurance Currently in DRAFT format Being reviewed/finalized by ETF
Quality Control Plan is approved by the Agency Personnel ◦ Require TSP2 certification for: Job Foreman ◦ Recommend for: Aggregate Spreader Operator Distributor Operator Testing Facilities ◦ Recommend AASHTO Accreditation Program ◦ Allow other accrediting body approved by Agency
◦ Gradation ◦ Unit Weight ◦ Bulk Specific Gravity ◦ Flakiness Index ◦ Aggregate Absorption ◦ Fractured Faces ◦ Deleterious Material ◦ Application Rates
◦ Viscosity ◦ Temperature ◦ Residue ◦ Demulsibility ◦ Sieve ◦ Storage Stability ◦ Multiple Stress Creep Recovery (MSCR) ◦ Ductility ◦ Elastic Recovery ◦ Penetration ◦ Ash Content (cationic) ◦ Solubility (anionic) ◦ Application Rate
Require to be submitted at least 15 days prior to construction. Requires details on: ◦ Scope – all applicable specifications ◦ QC Organization – org chart, qualifications ◦ Testing Facilities and Equipment – testing labs, equipment calibration ◦ Materials Control – sources, stockpiling ◦ QC Activities – Workmanship Materials sampling locations Test methods and Frequency Inspection and Oversight
Placement and Workmanship ◦ Calibration procedures ◦ Method to monitor application rates ◦ Method to ensure proper spread patterns ◦ Rolling operations ◦ Sweeping operations ◦ Method to control traffic Documentation – reporting procedures, sample test forms, reports Non-Conformance and Corrective Action – method to identify and corrective action QC tests submitted to Agency within 24 hours. Include supplier material certifications
Materials Sampling and Testing ◦ Aggregate and Emulsion Testing ◦ Vendor certifications Materials Personnel Surface Preparation ◦ Surface is clean and dry ◦ Minor defects corrected Construction Procedures ◦ Equipment calibrated and functioning correctly ◦ Proper placement procedures followed Post Placement ◦ Check for any issues ◦ Bleeding, broken aggregate, raveling, joint laps, etc.
IA is conducted by the Agency Purpose is to Evaluate for Adequacy ◦ Personnel skills ◦ Equipment ◦ Both agency acceptance testing and contractor QC testing IA is NOT for determining if materials or processes are in spec
Once we all agree on the format and content for chip seals… Expand to include other treatments ◦ Micro/Slurry ◦ Tack Coat/fog seals ◦ Ultrathin Bonded Wearing Course ◦ Other
R. Gary Hicks Phd, P.E. rghicks40@outlook.com 530-588-4446 17
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