There is a mass of evidence from: * Suvivors * Perpetrators * 'Bystanders' * Post war trials In addition, there is photographic and archaeological evidence. Please see the link.
You have a major problem. concrete is not water proof (liquid or vapor)or really even water resistent. If you look at a concrete pool or tank, a thin plaster coating provides the water proof layer - not the concrete. Your best bet is to remove the concrete, lay down a real water proof layer and reinstall the concrete. You can put so called water proof paints/materials on the cement, but they will only last a few years. In the mean time, you will have completely rotted the wood framing that supports the concrete slab.
Yes, there is water proof concrete polishing. You can purchase it at Lowes.
There is no concrete/solid proof as of yet.
The definition of a concrete images is an image that cannot be disproved. This image can be proof of evidence for example.
no unless there is a chemical change but there isn't. only a physical change has occurred
There is evidence that Tocqueville may have been a Freemason, but no concrete proof.
This is a heavy gauge polythene laid under the concrete to stop dampness rising upwards
Source documents provide details about a financial change in the business
a avalanche proof house is most likely made of reinforced concrete boxes hope it didn't help! :P
a avalanche proof house is most likely made of reinforced concrete boxes hope it didn't help! :P
no concrete scientific proof exists for this so certainly not.
Most likely, but there isn't much concrete proof either way.