There are hints there will be water in parts of the regolith. I am not sure how a water based cement would endure heat/vacuum, or only vacuum cycling - would it

There are hints there will be water in parts of the regolith. I am not sure how a water based cement would endure heat/vacuum, or only vacuum cycling - would it crumble? Inner places = less heat, but vacuum is all around. I tend to think that a low temperature melting mineral mix might work to bond blocks - a ceramic solder?