The National Academies

NCHRP IDEA 20-30/IDEA 199 [Completed (IDEA)]

Using Medical X-Ray Machines to Determine the Service Life of Concrete

  Project Data
Funds: $100,000
Staff Responsibility: Inam Jawed
Research Agency: Oklahoma State University
Principal Investigator: Tyler Ley
Completion Date: 11/8/2019
Fiscal Year: 2018

This project developed an X-ray prototype that uses dental x-ray equipment with the capability to safely measure the fluid penetration of paste, mortar, and concrete that could be used in the laboratory or the field.  A sampling method was determined to obtain samples from the field and software code was written to assist in the data analysis of the imaging process. An X-ray prototype (named ‘Checking Ion Penetration’ or the ‘CHIP’ device) was successfully created in a practical, time-efficient, safe, and inexpensive approach to measure the permeability of concrete. Multiple modifications and adjustments were made to create an easy to use sample stage. A case study was completed for the Oklahoma DOT that showed the value in the equipment to examine the permeability of different bridge decks and the efficiency of the silane sealers. The CHIP device is a practical, fast, safe, and inexpensive approach to X-ray image concrete, mortar, or cementitious paste to measure their permeability.  This testing could be done while the construction work is being completed or to investigate in-place infrastructure. The information from the CHIP device would allow DOTs to know much more accurately the quality and expected service life of their concrete infrastructure. This method could also be used to compare the effectiveness of different repair materials or the use of surface sealers to prolong the service life of the concrete.

The final report is available.

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