Scanning for Slab Thickening

A long-term & valued client of ours needed to structurally upgrade a large span of slab. Formerly a parkade roof, the now 30 year old concrete slab would have to act as a drive way between a cluster of new towers being built in its vicinity. However, the slab was not designed to withstand this kind of loading.

The concrete slab was not deemed "structurally sound" to support the additional traffic inherent with the added population in the complex. There was a need to pour another slab on top of the existing one to make the whole structure stronger. The problem is that these slabs need to be connected to one another, which involves drilling hundreds of dowels (rebar ties) into the concrete to link the two slabs. Without a prior concrete scanning survey,drilling blindly into the concrete would result in hitting rebar and electrical conduits multiple times.

The slab in question showing some of the scanning & rebar installation work

The size of the area was approx 7,000 sqft and to cater to the clients timeline we were able to activate multiple technicians to get the job done.

The Xradar team came to site and proceeded to scan the whole area(~7000 sq. ft.) marking every piece of rebar or electrical conduit & other targets that could interfere with the drilling process. Our technicians also accurately marked the edges of slab bands and provided the client with accurate slab thickness variations across the area, highlighting the shallow sections of the slab.

The end result is this beautiful picture of the scanned area from a bird’s eye view.

The client was able to drill all their dowels without a single hit.

Scanning has finished and the doweling team which had been chasing them all week have caught up!!