What method is used to determine the aggregate size for concrete mixes?

The Sieve Analysis test is used to determine the aggregate size in concrete mixes because it measures the particle size distribution of granular material. By passing the aggregate through a series of sieves with different mesh sizes, it effectively categorizes the aggregates based on their sizes. This allows engineers and construction professionals to evaluate whether the aggregate meets the specific requirements for various concrete applications, as different projects may require different grading to achieve optimal workability, strength, and durability in the concrete.

Other tests mentioned, such as the Standard Proctor Test, Slump Test, and Compression Test, are used for different purposes. The Standard Proctor Test typically evaluates soil compaction, the Slump Test measures the consistency or workability of freshly mixed concrete, and the Compression Test assesses the strength of hardened concrete. While these tests are essential in the construction and civil engineering field, they do not provide information about the size distribution of aggregates, which is critical for concrete mix design.