Identifying wet pavement subgrades through nondestructive techniques 1

[jenduro]

Does anybody know the best method for identifying wet soils beneath existing pavements? I have heard of using GPR, but does it work well where clays are present. Also, what about infrared imaging. Is this possible?

 

[proletariat]

I don't know about non-destructive, but it wouldn't take 'much' destruction to get a core sample, and check the moisture content. You could do it with a masonry bit to get through the pavement, and then a wood auger bit to bring tailings to the surface. It wouldn't take more than a 1" hole, and you could use a hand drill (but probably not cordless.)

 

[Ron]

GPR does not work well for that. Infrared thermography will work on relatively thin pavements.