Cracks in concrete

[tsarav1]

Hello folks,

Is there a way to find the depth of a crack in a concrete.And if are going to pour a sealer over the cracks.How can we find the depth to which it has penetrated.

Thanks in advance

Thyaga

 

[Zambo]

you could either core drill or break out some areas of the slab to check the depth of the crack. Alternatively ultra sonic testing will give fairly accurate readings.

Zambo

 

[BFPartners]

Normal method of crack sealing is to use ports and pressure grouting the cracks. Most contractors know this method and you do not need to know the crack depth. Most crack sealers will specify the crack width.

 

[Ron]

BFPartners...I assume you mean "pressure epoxy" instead of "pressure grouting". Grouting isn't done for typical cracks.

For flatwork, the method is usually to use a low viscosity epoxy, acrylic, or methacrylate sealer flowed into the crack by gravity. Since the top of the crack is most often wider than the bottom, you can gauge the type of material to use from the top width of the crack. The sealer manufacturers give guidelines for their particular sealers as they know the viscosity of their formulations.

The depth of the crack is relatively unimportant in this regard for slab cracks. Assume full depth cracks.

As to checking the effectiveness of the repair, the non-destructive methods are not yet sophisticated enough to give clear definition of repair depths. Coring is the only way to precisely know the effectiveness.