Vapor Drive / Osmotic Action & RH

[eaadams]

We are doing a project right now where the old warehouse was found to lack a retarder under the slab. RH came in at 99%. It is being VAP'd this week. What is interesting is when I discussed with my VAP rep, he kept talking about moisture vapor pressure. Can anyone point me to anything linking RH & Vapor? I guess where I am a little confused is how does RH predict Vapor / Osmotic Action?

It is one thing to use a water soluble adhesive that will dissolve under PH & Moisture over time if in contact with concrete water (for lack of a better word) but it is another thing to have that wicking action acting as a force from bellow. The two can result in more blisters (a light version of what you see with ASR). Anyone have a perspective on this?