How is sand sized or graded?

Sand is graded or sized primarily by passing it through wire meshes known as sieves. This method utilizes a series of sieves with different mesh sizes to separate particles based on their diameter. As sand is shaken through the sieves, larger grains are trapped in the upper screens while finer grains pass through, allowing for a systematic classification of the sand size.

This technique is essential in various applications, including construction and geological studies, where specific grain sizes can significantly affect the properties of materials being utilized. The effectiveness of the sieve method is well-established, making it a standard practice in soil and aggregate analysis.

Using chemical analysis, measuring weight, or visual inspection may provide some information about the sand, but they do not effectively determine the size or grading of sand particles. The sieve method is the most accurate and reliable means of achieving this classification.