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

The Sieve Analysis test is the established method for determining the aggregate size in concrete mixes. This test involves passing aggregate samples through a series of sieves with varying mesh sizes. By doing this, one can classify the particles by size and determine the distribution of different-sized aggregates within the sample.

Understanding the size distribution is crucial for ensuring the desired performance of the concrete, such as its workability, strength, and durability. Different sizes of aggregates interact in specific ways with cement and water, affecting the overall properties of the concrete mix.

While the other methods listed, such as the Standard Proctor Test, the Slump Test, and the Compression Test, serve important purposes in construction and materials testing, they do not focus specifically on the determination of aggregate size. The Standard Proctor Test is generally used for assessing the moisture-density relationship of soils, the Slump Test measures the consistency and workability of freshly mixed concrete, and the Compression Test assesses the strength of concrete once it has set.