Which standard is often referenced for quality control in concrete?

The standard that is often referenced for quality control in concrete is ASTM C94. This standard specifically provides guidelines for the specification of ready-mixed concrete, addressing various aspects related to production and delivery, which are crucial for maintaining quality control throughout the mixing process. It outlines requirements for the materials used, the process of mixing, the delivery methods, and the conditions for placement, ensuring that the concrete meets the desired performance characteristics.

By adhering to this standard, inspectors and contractors can ensure a consistent quality of concrete, which is vital for the durability and overall performance of structures. This makes ASTM C94 an essential reference for anyone involved in concrete construction, particularly in the context of ready-mixed concrete.

The other standards serve different purposes: ASTM C90 relates to concrete masonry units, ASTM C150 deals with portland cement specifications, and ASTM C33 focuses on coarse aggregates for concrete. Although these are important in their respective areas, they do not directly address quality control of ready-mixed concrete as comprehensively as ASTM C94.