Bolts are used to fasten two parts with through holes. This type of connection is called a bolted connection. Since the two parts can be separated by unscrewing the nut, a bolted connection is a detachable connection. Anchor bolts are a type of bolted connection; after assembly, only the nut is detachable, while the bolt itself is fixed to the concrete substrate in some way and cannot be separated.
Chemical anchoring uses a chemical adhesive (anchoring adhesive) to bond ribbed steel bars to drilled holes in the concrete substrate. Through bonding and locking, the ribbed steel bars are anchored.