GPR concrete scanning is a non-destructive method of inspecting the concrete structure. It is required in a variety of applications. The main purpose of concrete scanning with GPR is to inspect the concrete structure, locate the utilities, and determine the spacing of rebars and other physical features of concrete.
The term GPR stands for Ground Penetrating Radar. In this post, we will learn about the techniques, applications, and available tools of GPR concrete scanning.
What is the Technique of GPR Concrete Scanning?
The basic working principle of GPR concrete scanning is very simple. Ground-penetrating radar is used to emit electromagnetic waves of high frequency using a transmitter. These waves hit the obstacles and reflect back, and the reflected waves are received by a receiver. A GPR engineer analyses the reflected waves and determines the nature and location of the obstacle. A GPR comes with both a transmitter and a receiver antenna.
Due to the very process of how GPR works, there are a lot of variables involved in GPR concrete scanning. Those who are not aware of the GPR scanning often get surprised when they get to know that GPR does not tell you about the type of utility. It is the GPR engineer that observes the data and makes meaningful information out of it. So, the GPR engineer that observes the data also plays a key role in ensuring the accuracy of the results.
What Are the Applications of GPR Concrete Scanning?
GPR concrete scanning has two major applications. Have a look at them:-
1. Used to Locate Utilities
The main application of the GPR concrete scanning is to find out the location of utilities beneath the concrete surface. It is used to locate rebars, PT cables, conduits, electrical conduits, plumbing installations and more. Locating the utilities is required before drilling the concrete structure for safe operation. Finishing work contractors use GPR concrete scanning to mark the location of the drill before drilling the concrete structure.
2. Inspect the Structure
The next application of GPR concrete scanning is to inspect the concrete structure for structural analysis. It often involves calculating the spacing of the rebar, determining the voids, and other structural features for structure analysis. The data obtained from GPR concrete scanning is used by the structural analysis engineers to make the recommendations, if any.
What Are the Available Tools for Concrete Scanning?
There are many non-destructive methods to inspect the concrete structure, such as GPR scanning, X-ray scanning, and ultrasonic tomography, but GPR scanning is the industry standard due to its safety, cost efficiency, and quick & accurate results. The accuracy of the results of concrete scanning depends a lot on the capabilities of GPR. Advanced GPR provides accurate results with a more depth range.
At Concrete Insight, we use GSSI Structure Scan Pro SIR4000 for GPR concrete scanning that provides accurate results. Also, we have more than 25 years of experience in concrete scanning and core drilling. If you need help with any of these services, you can contact one of our experts.