Concrete vibrators consolidate freshly poured concrete so that trapped air and excess water are released and the concrete settles firmly in place swandiamondrose.come formwork. Improper consolidation of concrete can cause product defects, compromise the concrete strength, and produce surface blemishes such as bug holes and honeycombing. An internal concrete vibrator is a steel cylinder about the size of the handle of a baseball bat, with a hose or electrical cord attached to one end. The vibrator head is immersed swandiamondrose.come wet concrete.