A recently developed method of repair described which has been used for the reinstatement of faultily constructed reinforced concrete beams is the use of ″prepackaged″ unhardened concrete parcels which can be secured to reinforcing bars in the numbers required and heavily compacted into position by simple hand or mechanical equipment. This method avoids the possible formation of minor cavities in the structure behind reinforcing bars which might arise through their screening of the area from the air/mortar blast, particularly where there is a heavy concentration of steel.