Internal or external vibration? Done correctly, either will produce a high-quality finish.(of concrete) From: Concrete Construction | Date: January 1, 2003| Author: Ford, Jerome H. | COPYRIGHT 2003 Hanley-Wood, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group.Copyright information

Internal vibration is vibrating the concrete from within the formwork, while external vibration is vibrating the formwork from the outside. Who hasn't seen a precast patio block and wished for that kind of finish on the next concrete job? If you were to investigate, you would find that the block was externally vibrated, and you might conclude that the best method of vibration is external. But the method of vibration is not the only consideration.

Internal vibration

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