What are the commonly used methods for determining aggregate size?

Sieve analysis is a widely accepted method for determining the size distribution of aggregate materials. This technique involves passing the aggregate through a series of sieves with varying mesh sizes and weighing the retained material on each sieve to establish a size gradation profile. It provides valuable information regarding the particle size distribution, which is crucial for ensuring that the aggregate meets specifications for strength, workability, and overall performance in concrete or asphalt mixtures.

In addition to sieve analysis, measuring tools can be employed to assess the size of larger pieces of aggregate. These methods may include calipers or rulers that allow for direct measurement of individual stones or particles that are too large for effective sieving. The combination of these two approaches gives a comprehensive view of the aggregate size, which is fundamental for quality control in construction materials.

Other methods listed, such as ultrasound inspection, thermal expansion, or colorimetric analysis, are not standard practices for determining aggregate size in the context of construction and engineering applications. They focus on different properties or characteristics of materials rather than size distribution, which is why they are not suitable alternatives for this particular purpose.