Commonly used stones for roads and bridges are limestone, granite, quartz stone, basalt, river pebble, marble, bluestone, feldspar, etc. Impact crusher, cone crusher, jaw crusher, sand making machine, vibrating screen sand washing machine, etc. are special equipment in the production line of construction. This type of equipment is used to make various types of rock, granite, basalt, limestone, quartzite, pebbles, river pebbles and other ores into building sand of various sizes, which is fine in shape, epigranular and highly compressive strength, so it greatly improve the quality of construction.