The aggregates row materials are natural stones, which are mainly consist of three kinds of rocks: sedimentary rock, igneous rock and metamorphic rock.

Sedimentary rock: limestone, sandstone;

Igneous rock: andesite, granite, diabase, tuff, and basalt;

Metamorphic rock: quartzite, gneiss, and marble.

Gravel

5-1 gravel: the particle size is 5-10mm

12 gravel：the particle size is 10-20mm

13 gravel：the particle size is 16-31.5mm

2-4 gravel：the particle size is 10-15mm

4-6 gravel：the particle size is 15-20mm