A composite agent is used to achieve the shear-resistant bond of one material with a second material in order to transmit forces.
In steel composite construction, welded-on head bolt end anchors have become the main method of connecting a steel beam to reinforced concrete. Head bolts are regulated in DIN EN 1994-1-1. Other types of steel anchors and dowels, such as loop anchors or thigh anchors, which are also welded to the steel beam and are poured with concrete, require general technical approval. For subsequent bonding of reinforced concrete slabs that have already hardened, it is possible to create the bond using high-strength, castable screws. This type of composite can be dismantled and also requires building authority approval.
In the case of composite sheets, the two-dimensional bond between the sheet steel and the reinforced concrete layer is primarily achieved via the geometry of the sheet, usually as undercut trapezoidal sheet metal with corrugations and webs, and via grooves and knobs embossed into the sheet metal or via rivets. In most cases, an additional composite securing device is necessary at the end of the sheet metal in the form of sheet metal deformation or head bolt anchors.
Source: bauwion
