What are the different types of sand and gravel

Coarse aggregate, fine aggregate, natural sand, manufactured sand, and blended sand—if you're considering investing in a sand plant, you must first understand these technical terms! Newcomers to the sand and gravel industry may wonder: what exactly are the particle sizes of these stones and sands? We've summarized the key points and will explain them in detail today.

1. Aggregate: Loose granular materials like rock particles that provide skeletal structure, fill voids, and stabilize volume in concrete. Classified by particle size into coarse aggregate and fine aggregate.

2. Coarse Aggregate (Stone): Rock particles larger than 4.75mm, including pebbles and crushed stone: Pebbles: Naturally weathered rock particles larger than 4.75mm, formed through water transport, sorting, and deposition. Crushed Stone: Rock, pebble, or untreated mine tailings processed through soil removal, mechanical crushing, shaping, screening, and particle size control to produce rock particles larger than 4.75 mm.

3. Fine Aggregate (Sand): Rock and particles smaller than 4.75 mm in diameter, including natural sand and manufactured sand.

4. Natural Sand: Naturally formed rock particles smaller than 4.75 mm in diameter, obtained through manual extraction and screening. This includes river sand, lake sand, mountain sand, and desalinated sea sand, but excludes soft or weathered rock particles.

5. Artificial Sand: Includes manufactured sand and blended sand.

6. Manufactured Sand: Rock, gravel, or untreated mine tailings processed through soil removal, mechanical crushing, shaping, screening, and particle size control to produce rock particles smaller than 4.75 mm.

7. Blended Sand: Sand formed by mixing natural sand and manufactured sand in a specific ratio.

The quality of manufactured sand directly impacts the economic efficiency of sand production. High-quality finished sand features uniform particle size, excellent shape, superior quality, low needle and flake content, and high cleanliness. This requires a high-quality sand making machine. A good sand making machine produces finished sand with controllable particle size and output that meets user production demands. We recommend Zhengzhou OCP Heavy Industry's vertical impact crusher. If you're interested in sand-making equipment, click our website chatbot for a free consultation now.