Grout used in masonry must comply with which ASTM standard?

Grout used in masonry must comply with ASTM C476, which establishes the requirements for the materials and properties of grout used in masonry construction. This standard outlines the necessary components such as the type of cement, aggregate, water, and optional admixtures that can be included in the grout mixture. It also defines performance criteria, ensuring that the grout achieves adequate compressive strength, bond strength, and durability necessary for structural integrity in masonry applications.

Understanding this standard is crucial for building inspectors and contractors to ensure that the grout used in masonry meets structural and performance requirements, contributing to the overall safety and longevity of the masonry work.