ProAsh® Quality Control Plan

• Separation System Process Control
• Shipment Quality Control
• Technical Service Testing

Separation System Process Control
Quality control assuring production of low LOI fly ash

• Processed ash specification
  • 2.5% maximum LOI
  • Controlled Foam Index
• Testing Frequency
  • Max. 30 minutes processing time / 20 tons of product ash
  • Separation process adjusted as needed to maintain product LOI target to <2.3%
  • LOI target lowered if Foam Index changes significantly - maintain air entrainment effects
• Testing Method
  • "Quick" LOI Test - Agreement to ASTM C311 method +/- 0.1%
  • Quantitative Foam Index Test - Assessment of air entrainment admixture demand

Shipment Quality Control
Truck and railcar samples assuring shipment quality

• ASTM Specification C 618 / AASHTO Specification M 295
• ASTM Specification C 311 Table 1: Minimum Sampling and Testing Frequency
  • Moisture Content, LOI, Fineness - Daily or each 400 tons shipped
• All other tests in ASTM Specification C618
  • Monthly or each 3200 tons shipped based on composite sample of all daily tests
• Additional testing which exceeds ASTM / DOT requirements
  • Samples obtained from every shipment load and retained for a minimum of 60 days
  • LOI test on minimum of each fourth shipment load
  • Foam Index test on minimum of each fourth shipment load
  • Specific customer requested testing

Technical Service Testing
Testing conducted at our Technical Center in Needham, MA

• Training of production site personnel
• Periodic verification of Quality Control testing at production facilities
• Wet mortar testing
  • Flow properties, mortar air, water requirements
  • Determine affects of cement sources and admixtures
• Detialed particle size distribution
• Fly ash pH
• Fly ash ammonia content
• Evaluation of air entrainment principles
  • Foam Index with multiple surfactants and commercial admixtures
  • Methylene blue adsorption evaluation of carbon activity
• Other testing as needed to evaluate ash quality and diagnose customer concerns

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