Abstract: Devices and methods for forming voids or cavities in concrete such that reinforcing bars can be used to connect different pours of concrete, the devices including an insert having a base and an elongate member extending from the base, and the method including coupling the insert to formwork, pouring concrete into the formwork, which surrounds the insert, allowing the concrete to partially cure, such that it retains its shape, removing the formwork and insert to form a void in the partially cured concrete, inserting a reinforcing bar into the void, applying adhesive to adhere the reinforcing bar to the concrete, and pouring concrete around the reinforcing bar, such that the reinforcing bar joins the two pours of concrete together via the void and adhesive.

Abstract: A device for forming a void in cured concrete, the device including a circular base with at least one hole through the base, an elongate rod coupled to the base, and a sleeve with a longitudinal axial bore extending from a first end of the sleeve to and through a second end of the sleeve, the axial bore sized and shaped to receive the elongate rod in slidable engagement within the axial bore and a length of the sleeve being greater than or equal to a length of the elongate rod. The base is coupled to concrete formwork and concrete is poured over the sleeve and the elongate rod and allowed to cure. The rod is removed from the sleeve and the sleeve is removed from the cured concrete to form the void in the cured concrete.