ASTM C476
Full Name
ASTM C476 – Standard Specification for Grout for Masonry
Scope
ASTM C476 specifies the requirements for grout used in masonry construction. The grout can be classified into two types:
- Conventional grout: this type of grout is typically a mixture of Portland cement, sand, water, and sometimes pea gravel or other admixtures. It is designed to have a slump between 8 and 11 inches (200 to 280 mm) for easy placement and consolidation.
- Self-consolidating grout: this type of grout is a highly flowable mixture that can fill the spaces between masonry units under its own weight without needing vibration or other consolidation methods. It typically has a slump flow of 24 to 30 inches (610 to 760 mm) and a visual stability index (VSI) of not more than 1.
The scope of ASTM C476 includes:
- Materials: it specifies the suitable materials for grout, including Portland cement, sand, pea gravel, water, and admixtures.
- Properties: it outlines the physical and mechanical requirements for both conventional and self-consolidating grout, such as compressive strength, slump, flow, and stability.
- Proportioning: it provides guidance on proportioning the ingredients for both types of grout to achieve the desired properties.
- Mixing and placement: it outlines the general procedures for mixing and placing grout to ensure proper filling of the spaces within masonry structures.
- Testing: it refers to other ASTM standards for specific test methods used to evaluate the properties of grout.
ASTM C476 is a crucial reference for ensuring that the grout used in masonry construction meets the required standards for strength, durability, and workability, contributing to the overall structural integrity and performance of masonry structures.
ASTM C476 Accredited Laboratory
Applied Testing & Geosciences, LLC is accredited for performing tests using the ASTM C476 standard.
Let us help you ensure the quality and performance of your masonry grout. Contact us today to learn more about our testing capabilities and how we can support your project.
Resources
Keywords
grout; masonry; compressive strength; slump; flow; portland cement; sand; pea gravel; self-consolidating grout; admixture