Which standard must regular cements conform to?

Regular cements must conform to ASTM C150, which is the standard specification for Portland cement. This standard outlines the requirements for the physical and chemical properties of Portland cement, ensuring its quality and consistency for various construction applications. It includes classifications, such as different types of cement based on their properties and intended uses, which are essential for engineers and contractors to select the appropriate cement for specific projects.

In contrast, the other standards listed focus on different aspects of construction materials. ASTM C33 specifies the requirements for fine aggregate used in concrete, ASTM C330 deals with lightweight aggregates for structural concrete, and ASTM C1611 refers to the testing of self-consolidating concrete. While these standards are important for specific components of concrete and construction processes, they do not regulate the properties of regular Portland cement itself.