Chip Seal Quality Assurance Guide Todd Shields, Indiana dot Tsp2 emulsion task force

What is the goal?

What we are trying to AVOID

So how do we get there? Good specifications Good designs Qualified personnel Contractor – actually running the equipment Agency – overseeing and accepting Solid Quality Assurance QA Specifications QC Plans Agency Acceptance Protocols Independent Assurance

ETF Quality Assurance Guide The guide includes: Contractor Quality Control Agency Acceptance Protocols Independent Assurance Currently in DRAFT format Being reviewed/finalized by ETF

Contractor Quality Control Plan Quality Control Plan is approved by the Agency Personnel Require TSP2 certification for: Job Foreman Recommend for: Agg Sreader Operator Distributor Operator Testing Facilities Recommend AASHTO Accreditation Program Allow other accrediting body approved by Agency

Contractor Quality Control - Aggregate Gradation Unit Weight Bulk Specific Gravity Flakiness Index Aggregate Absorption Fractured Faces Deleterious Material Application Rates

Contractor Quality Control - Emulsion Viscosity Temperature Residue Demulsibility Sieve Storage Stability Multiple Stress Creep Recovery (MSCR) Ductility Elastic Recovery Penetration Ash Content (cationic) Solubility (anionic) Application Rate

Contractor Quality Control Plan 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

Contractor Quality Control Plan 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

Agency Acceptance Protocols 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.

Independent Assurance 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

Next Steps Once we all agree on the format and content… Expand to include other treatments Micro/Slurry Tack Coat? Ultrathin Bonded Wearing Course