Frequent Questions-Answered – Concrete Scanning

Scan Plus continues to see an increase in the use of ground penetrating radar to scan or image concrete slabs. Concrete imaging with ground penetrating radar is typically a very successful process yield results that ensure construction, cutting, drilling, etc. can continue without impact to the facility or project.

1. Often we are asked if Ground Penetrating Radar (GPR) can scan/image concrete slab-on-grade. The answer, simply, is yes. This question often comes from someone who is familiar with concrete “X-Raying”. While X-Raying concrete is still a valid technique for determining the location of reinforcing steel it is limited to elevated concrete slabs only. This is because you need to have access to both sides of the concrete to perform an x-ray. Ground penetrating radar is a completely different technology.
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Voici pourquoi vous devez choisir le géoradar pour vos projets

Why Should You Choose GPR For YOUR Project?

Here’s 5 reasons why:

# 5. The schedule:

Every project struggles to maintain its projected schedule. One of the biggest problems are the unexpected. This could be because a utility is cut or damaged during excavation, or an electrical conduit was severed while cutting the concrete slab. Scan Plus can help you keep your project on schedule …

We help by mapping the various ducts found in a slab or in private or public outdoor area. These findings can be sketched, mapped, plotted and reported in many different ways.
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Digging up the past with GPR

A short time ago, Scan Plus got to be part of a special project that emphasizes how useful ground penetrating radar (GPR) can be and how it can make a big difference to people in a really amusing way. We were contacted through Facebook with a very interesting request from a school in Sherbrooke, Quebec. The request was to scan to find the time capsule buried in the late 70’s.

Due to the good memory of some students who had been there when the capsule was buried, we had a general idea where to look. Since the area of concern was in the employee/student parking lot, we picked a day when they were off school to allow us the freedom to scan the whole area.

We used a machine called Ground Penetrating Radar (GPR). GPR is a geophysical method that uses radar pulses to image the subsurface. This non-destructive method uses electromagnetic radiation waves and detects the reflected signals from subsurface structures. On this occasion, the subsurface structure would be the time capsule!

It took about 2 hours to work the site. We found what we were looking for and outlined the area on the blacktop so the excavation crew would know where to dig.

The staff and students were ecstatic that we found the tank! They had made other attempts in the past with other equipment and didn’t have any luck.

excavationThe school representative immediately contacted us with pictures of the excavation of the capsule. We were then invited to the banquet where my technician was congratulated with his efforts. Although most of the contents were damaged from water, it was still a great event to be a part of and an exciting change from the ordinary locating that we often do!