ASTM C618
Full Name
ASTM C618 – Standard Specification for Coal Fly Ash and Raw or Calcined Natural Pozzolan for Use in Concrete
Scope
ASTM C618 covers the use of coal ash and raw or calcined natural pozzolan as supplementary cementitious materials (SCMs) in concrete. These materials are used to enhance concrete properties or achieve specific performance characteristics.
The standard focuses on the following:
- Materials: it specifies the requirements for coal ash (resulting from coal combustion) and raw or calcined natural pozzolan (a siliceous or aluminous material).
- Applications: it outlines the use of these materials in concrete, where cementitious or pozzolanic action is desired, or where other properties like improved workability, reduced permeability, or increased durability are sought.
- Chemical composition: it provides limits on the chemical composition of coal ash and natural pozzolan to ensure their suitability for use in concrete.
- Physical properties: it specifies requirements for fineness, density, and other physical properties of the materials.
- Sampling and testing: it outlines the procedures for sampling and testing coal ash and natural pozzolan to verify their compliance with the standard.
- Storage and inspection: it provides recommendations for the proper storage and inspection of these materials.
The primary objective of ASTM C618 is to ensure the quality and consistency of coal ash and natural pozzolan used in concrete, thereby contributing to the production of durable and high-performance concrete structures.
ASTM C618 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C618 standard.
Contact us for more information.
Resources
Keywords
coal ash; natural pozzolan; concrete; supplementary cementitious materials; fly ash; bottom ash; calcined pozzolan; chemical composition; fineness; water requirement; strength activity index; alkali-silica reactivity; sulfate resistance; loss on ignition; moisture content