Concrete scanning · Drummondville
Concrete scanning and GPR in Drummondville
In Drummondville, concrete scanning with ground-penetrating radar (GPR) locates rebar, conduits and other embedded items before you core, drill or cut a slab, wall or column. The planning meeting is booked early, because it sits inside the work schedule.
Drummondville
Working in Drummondville
Drummondville asks for an appointment for planning requests that involve meeting an inspector, and states that appointments will become mandatory. One more step in the schedule is therefore secured early. The survey is prepared separately: describe the number of openings, their approximate location and the reachable face. If several penetrations are scattered, say so, since separate areas are not swept the way a continuous surface is.
Drummondville asks that you book an appointment for any planning request that involves meeting an inspector, and states that appointments will become mandatory. A meeting to schedule is one more step in the calendar, better secured early than discovered once the opening date has been set.
Preparing your project in Drummondville
- Book the planning meeting as soon as the nature of the work is settled
- Count the planned openings and say whether they are grouped or scattered
- Indicate the reachable face for each area to survey
Drummondville’s manufacturing past and your concrete surveys
Drummondville’s industrial shift began with electricity. According to Histoires de chez nous, Southern Canada Power arrived in 1914, acquired the operating rights to six falls on the Saint-François River, bought the generating station built in 1896 at the end of rue des Forges and completed its new hydroelectric complex in 1919. Textile manufacturers followed: Butterfly Hosiery and Canadian H. W. Gossard were announced in November 1919, then Jenckes Canadian Tire Fabrics (1920), Dominion Silk Dyeing & Finishing (1923), Louis Roessel (1924) and Canadian Celanese (1926). The population tripled between 1921 and 1931, from 4,433 to 12,023 residents.
Canadian Celanese, which made cellulose acetate fibres, employed 1,757 workers in 1933 and some 5,000 in 1945, according to the Répertoire du patrimoine culturel du Québec. In 1926 it also built the Carré Celanese, a group of about a dozen red-brick houses for its executives, designed by the architects Ross and MacDonald. The plant closed on March 31, 2000.
The industrial base has since been renewed. Drummond économique counts about 600 manufacturing establishments in the Drummond RCM, several of them international in scale, in an area crossed by highways 20 and 55.
In an industrial building that has changed use, the slab may keep traces of installations that are gone: levelled machine bases, abandoned conduits, filled openings. Before drilling for a new production line, gather what you know about previous occupants and removed equipment, and point out the areas where the floor has been redone.
In a plant in production, also specify vibrations, equipment that cannot be moved and the planned shutdown windows.
How ground-penetrating radar works
Ground-penetrating radar (GPR) emits high-frequency electromagnetic waves and records their reflections at boundaries between materials with different properties, such as concrete and steel. The ASTM D6432 guide describes this investigation method.
GPR is also one of the non-destructive test methods for in-place concrete reviewed by the American Concrete Institute (report ACI 228.2R-13).
Method, preparation and GPR limitations
When to request a scan, how to prepare the survey, how to use the findings and what ground-penetrating radar cannot see are all covered on our concrete scanning in Quebec page. This page only covers what is specific to Drummondville.
Frequently asked questions
Does concrete scanning damage the structure?
No. GPR is a non-destructive test method: the device moves over the concrete surface without drilling or coring it.
What can ground-penetrating radar detect?
Usually rebar, conduits and other embedded items whose electromagnetic properties differ from those of concrete. Readability depends in particular on depth and on the condition of the concrete.
Do several scattered penetrations change the survey?
Yes. Separate areas each need preparation and marking, which is not the same organisation as one continuous surface. Saying so in the request helps frame the scope.
Can the survey come before the meeting with the City?
Nothing prevents it, and its observations often help describe the work. The two processes stay distinct, and neither removes the need for the other.
Sources
- ASTM D6432-19, Standard Guide for Using the Surface Ground Penetrating Radar Method for Subsurface Investigation
- American Concrete Institute, ACI 228.2R-13, Report on Nondestructive Test Methods for Evaluation of Concrete in Structures
- Ville de Drummondville: Prise de rendez-vous avec l’urbanisme (in French)
- Histoires de chez nous: Le grand développement industriel de Drummondville (in French)
- Répertoire du patrimoine culturel du Québec: Compagnie Celanese (in French)
- Répertoire du patrimoine culturel du Québec: Carré Celanese (in French)
- Drummond économique: Investir (in French)
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