Classification and specifications of crushed stone

According to the latest standard "Pebbles and Crushed Stones for Construction" (GB/T 14685-2022) issued by the State Administration for Market Regulation and the National Standardization Administration, crushed stone is defined as rock particles that have been mechanically processed by crushing, screening, etc., with a particle size greater than 4.75 mm. In addition, in the "Standard for Quality and Inspection Methods of Sand and Stone for Ordinary Concrete" (JGJ 52-2006) issued by the Ministry of Construction, crushed stone is defined as natural rocks or pebbles that have been crushed and screened, with a nominal particle size greater than 5.00 mm.