Underwater Concrete Inspection Equipment
Abstract
This report describes the development of three specialized instruments for the underwater nondestructive testing of concrete waterfront structures. One instrument is a magnetic rebar locator that locates rebar in concrete structures and measures the amount of concrete cover over the rebar. Another instrument is a rebound hammer that measures the surface hardness of the concrete. The third instrument is an ultrasonic test system that provides a general condition rating of the concrete based on sound velocity measurements. Each instrument consists of an underwater sensor connected to a topside deck unit via a buoyant umbilical cable. The battery-powered deck unit contains the signal conditioning electronics and data acquisition system. To operate each instrument, a diver must position the underwater sensor while a person topside operates the deck unit to collect and store data. Each independent instrument provides unique information to help assess the condition of the concrete structure.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1991
- Accession Number
- ADA236578
Entities
People
- A. Smith
- C. Rhoads
- D. Goff
Organizations
- Naval Facilities Engineering Service Center