Stone quarries are crucial raw material suppliers in infrastructure construction such as buildings, roads, and bridges. The stone they produce is typically categorized into several main sizes based on particle size and intended use.

The most common stone sizes include: 0-5mm, 5-10mm, 10-20mm, 20-31.5mm, and 31.5-63mm. Among these, 0-5mm fine aggregate, often referred to as "stone chips" or "manufactured sand," is primarily used for concrete mixing, masonry mortar, or road base courses. 5-10mm small-diameter stones are suitable for high-strength concrete, precast components, and other projects requiring high-quality aggregates. 10-20mm medium-diameter stones are the most commonly used, widely applied in ordinary concrete, road subbases, and foundation backfilling. 20-31.5mm coarse aggregate is frequently used in large concrete structures, hydraulic engineering, and railway ballast. Large-diameter stones (e.g., 40-60mm) are commonly used in water conservancy projects, retaining walls, or special foundation treatments. In addition, some stone quarries also customize special specifications according to specific customer needs, such as ultrafine powder (less than 0.075mm) for asphalt mixture filler, or large rubble for landscaping.

Stone grading is usually carried out using multi-layer vibrating screens to ensure uniform particle size and reasonable gradation to meet the technical specifications of different projects. Appropriate stone specifications not only affect the strength and durability of concrete, but also directly relate to construction efficiency and cost control. Therefore, stone quarries must strictly control the crushing, screening, and quality inspection processes during production to ensure that products meet national standards and the actual needs of the project.