ASTM C404
Full Name
ASTM C404 – Standard Specification for Aggregates for Masonry Grout
Scope
ASTM C404 covers aggregates intended for use in masonry grout. Masonry grout is used to fill the spaces between masonry units, such as bricks, blocks, or stones, to bond them together and provide structural integrity.
The scope of ASTM C404 includes:
- Types of aggregates: the standard addresses both fine and coarse aggregates, which can be used alone or in combination in masonry grout.
- Material requirements: it specifies the materials from which the aggregates can be made, including natural sand, manufactured sand, crushed stone, gravel, and air-cooled iron blast-furnace slag.
- Gradation requirements: it defines specific gradation requirements for fine and coarse aggregates, ensuring proper particle size distribution for optimal grout properties.
- Organic impurities: it includes provisions for testing the aggregates for organic impurities that could negatively affect the grout’s performance.
- Compressive strength: while not directly addressing the compressive strength of the grout itself, the standard requires that the grout made with the specified aggregates meet the compressive strength requirements of ASTM C476 – Standard Specification for Grout for Masonry.
In essence, ASTM C404 provides a framework for selecting and evaluating aggregates for masonry grout. By adhering to this standard, one can ensure that the aggregates used meet the necessary quality and performance criteria, contributing to the production of durable and structurally sound masonry grout.
ASTM C404 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C404 standard.
Let us help you ensure the quality of your masonry grout by testing your aggregates against ASTM C404. Contact us today to learn more about our services.
Resources
Keywords
aggregates; masonry grout; fine aggregate; coarse aggregate; gradation; compressive strength; organic impurities