What is building sand aggregate?

Aggregate is a kind of granular loose material, which plays a skeleton or filling role in concrete. Application of aggregate in civil engineering: cement concrete, asphalt concrete, subgrade, railway ballast, mortar, etc.

Aggregates can be divided into several categories:

Aggregates are generally divided into two categories according to aggregate particle size: (1):

Coarse aggregate: rock particles with a particle size greater than 4.75mm, such as pebbles and gravels;

Fine aggregate: rock particles with particle size less than 4.75mm, such as river sand, mountain sand and sea sand.

(2) According to the density of aggregate, it is divided into:

Ordinary aggregate: the density is 2500-2700 kg/m;

Lightweight aggregate: the density is 0~ 1000kg/m, such as ceramsite, calcined shale, expanded vermiculite, expanded perlite, foamed plastic particles, etc.

Heavy aggregate: the density is 3500-4000 kg/m, such as iron ore and barite.