Aggregate is a granular loose material that acts as a skeleton or filler in concrete. Aggregate, as the main raw material in concrete, acts as a skeleton and support in buildings.
Aggregates with a particle size greater than 4.75 mm are called coarse aggregates, commonly known as stones. Commonly used are crushed stone and pebbles. Crushed stone is a rock particle with a particle size greater than 4.75 mm made by natural rock or rock mechanically crushed and screened. Pebbles are rock particles with a particle size greater than 4.75 mm formed by natural weathering, water transport, sorting, and accumulation. Pebbles and crushed stone particles with a length greater than 2.4 times the average particle size of the corresponding particle size to which the particle belongs are needle-shaped particles; those with a thickness less than 0.4 times the average particle size are flaky particles (the average particle size refers to the average value of the upper and lower limit particle sizes of the particle size).
Aggregates with a particle size of less than 4.75 mm are called fine aggregates, commonly known as sand. Sand is divided into two categories according to its source: natural sand and artificial sand. Natural sand is rock particles with a particle size of less than 4.75 mm formed by natural weathering, water flow transportation, sorting, and accumulation, but does not include particles of soft rock and weathered rock. Natural sand includes river sand, lake sand, mountain sand, and desalinated sea sand. Artificial sand is a general term for machine-made sand and mixed sand that have been treated with soil removal. Aggregate, as the main raw material in concrete, plays a role in the skeleton and support of buildings. When mixing materials, cement becomes a thin paste when stirred with water. If aggregate is not added, it will not be able to form and will be unusable. Therefore, aggregate is a very important raw material in construction.
Aggregate is a granular loose material that acts as a skeleton or filler in concrete. Aggregate, as the main raw material in concrete, acts as a skeleton and support in buildings.
Aggregates with a particle size greater than 4.75 mm are called coarse aggregates, commonly known as stones. Commonly used are crushed stone and pebbles. Crushed stone is a rock particle with a particle size greater than 4.75 mm made by natural rock or rock mechanically crushed and screened. Pebbles are rock particles with a particle size greater than 4.75 mm formed by natural weathering, water transport, sorting, and accumulation. Pebbles and crushed stone particles with a length greater than 2.4 times the average particle size of the corresponding particle size to which the particle belongs are needle-shaped particles; those with a thickness less than 0.4 times the average particle size are flaky particles (the average particle size refers to the average value of the upper and lower limit particle sizes of the particle size).
Aggregates with a particle size of less than 4.75 mm are called fine aggregates, commonly known as sand. Sand is divided into two categories according to its source: natural sand and artificial sand. Natural sand is rock particles with a particle size of less than 4.75 mm formed by natural weathering, water flow transportation, sorting, and accumulation, but does not include particles of soft rock and weathered rock. Natural sand includes river sand, lake sand, mountain sand, and desalinated sea sand. Artificial sand is a general term for machine-made sand and mixed sand that have been treated with soil removal. Aggregate, as the main raw material in concrete, plays a role in the skeleton and support of buildings. When mixing materials, cement becomes a thin paste when stirred with water. If aggregate is not added, it will not be able to form and will be unusable. Therefore, aggregate is a very important raw material in construction.