ASTM C1866/C1866M-22 PDF

Overview

ASTM C1866/C1866M-22: Standard Specification for Ground-Glass Pozzolan for Use in Concrete sets the requirements for ground-glass pozzolans used as supplementary cementitious materials in concrete mixes. Ground-glass pozzolans, derived from recycled container glass, plate glass, or E-glass, enhance concrete durability through pozzolanic activity. This international standard, published by ASTM, ensures the consistent quality, testing procedures, and reporting necessary for effective application in construction projects.

Key Topics

• Scope and Material Sources The standard applies to ground-glass pozzolans manufactured from:
  • Container glass (e.g., bottles, jars)
  • Plate glass (e.g., windows)
  • E-glass (post-industrial glass fiber waste)
• Classification
  • Type GS: Ground soda-lime-silica glass (e.g., container and plate glass)
  • Type GE: Ground E-glass (waste fibers from glass reinforcement production)
• Chemical and Physical Requirements
  • Minimum and maximum content for silicon dioxide, aluminum oxide, calcium oxide, iron oxide, sulfur trioxide, and alkali levels
  • Limits on moisture content and loss on ignition
  • Fineness index and strength activity indices at 7 and 28 days when mixed with portland cement
• Testing and Sampling
  • Procedures for sampling, fineness testing, strength evaluation, and routine quality checks using referenced ASTM and CSA test methods
• Safety and Compliance
  • User responsibilities for establishing safety, health, and environmental practices
  • Reporting guidelines for supplier certification and product traceability

Applications

Ground-glass pozzolan is increasingly used in concrete applications aiming for enhanced sustainability, performance, and durability. Its pozzolanic reaction improves long-term strength development, reduces alkali-silica reactivity (ASR), and can contribute to resistance against sulfate attack. Key applications include:

• Ready-mixed and precast concrete: Incorporating ground-glass pozzolan as a partial cement replacement reduces the carbon footprint of concrete and recycles post-consumer and industrial waste.
• Infrastructure projects: Ideal for projects where longevity and resistance to chemical attack, such as bridges, wastewater treatment structures, and marine applications, are crucial.
• Sustainable construction: Ground-glass pozzolans are valued in green building initiatives for lowering cement usage and promoting the circular economy by utilizing recycled glass.
• Mitigation of Alkali-Silica Reaction (ASR): Especially using Type GE pozzolan, the risk of deleterious expansion from ASR is minimized, preserving the structural integrity of concrete over time.

Related Standards

Several international and regional standards are referenced by ASTM C1866/C1866M-22 to ensure the reliable assessment of ground-glass pozzolan properties:

• ASTM C109/C109M: Test Method for Compressive Strength of Hydraulic Cement Mortars
• ASTM C125: Terminology Relating to Concrete and Concrete Aggregates
• ASTM C150/C150M: Specification for Portland Cement
• ASTM C311/C311M: Test Methods for Sampling and Testing Fly Ash or Natural Pozzolans for Use in Portland-Cement Concrete
• ASTM C618: Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
• ASTM C1293, C1567: Test Methods for determining alkali-silica reactivity
• ASTM C204, C1069: Methods for assessing particle fineness and surface area
• ACI 318: Building Code Requirements for Structural Concrete
• CSA A3003, A3004: Canadian standards for cementitious material testing and glass content

Practical Value

Compliance with ASTM C1866/C1866M-22 helps stakeholders in the concrete industry-producers, designers, and contractors-ensure reliable, high-performance, and sustainable concrete solutions leveraging recycled materials. Adherence to this standard supports environmental goals, facilitates quality assurance throughout the supply chain, and promotes the use of supplementary cementitious materials with proven performance in modern construction.