What is the focus of ASTM C172?

The focus of ASTM C172 is on the standard practice for sampling freshly mixed concrete. This standard provides guidelines and procedures for collecting samples of fresh concrete to ensure that they represent the concrete being poured. Proper sampling is critical for determining the concrete's quality, consistency, and performance in testing scenarios.

Having a consistent method for sampling allows engineers and contractors to make informed decisions based on accurate data regarding the concrete's properties. This is especially important as the characteristics of freshly mixed concrete can significantly affect the overall strength and durability of the finished structure. By adhering to ASTM C172, professionals ensure compliance with quality standards and enhance the reliability of testing outcomes related to freshly mixed concrete.

The other options relate to different practices or standards that focus on specific aspects of concrete testing or curing, which do not align with the primary aim of ASTM C172.