Severe weather warning tomorrow, red level for our construction area!

So, here is a little update! Last night was really intense, but the prepared base plate as well as the "Feldherrenhügel" survived everything perfectly. The water just rushed down the street, there wasn’t even a puddle on the gravel surface.

Quite different today. Exactly at twelve o’clock they started concreting the base plate. By 2:30 pm they were finished, then the slab was thoroughly watered and all was good......until about 3 pm, then the next thunderstorm came with the same heavy rain as yesterday, incredible. In my opinion, it really washed out a lot of the binder. No idea if it can stay like this or not. If not, I have no plan yet what will be done then. The construction manager is informed and will come to take a look tomorrow.

Here are a few pictures, what do you think? Normal condition? Washed out? Still usable?

Joh. Is a base plate :-p

that is only superficial. as long as it doesn’t pour like buckets while pouring the concrete itself, not much should have happened. go there tomorrow and scrape at it, then you’ll know what I mean. it’s only annoying if, like I did, you go over it with a power trowel to have a smooth surface. then you’ll have a lot of dents in it. if insulation and screed are going over it anyway, you don’t have to worry about it.

Yes, the base plate was already nice and smooth today thanks to the wing trowel.....not anymore now. But seriously, it's really not a problem if the pebbles are already washed clean?

I also think the binder was washed out. The site manager can better assess how to proceed. April weather...[emoji52] We are keeping our fingers tightly crossed.

One must be clear about what concrete is. A mixture of three parts sand, one part cement, stirred with water into a mush. Concrete does not dry, it sets. The water is the catalyst that initiates a chemical reaction, causing the molecules to link together while releasing heat. This process takes up to six months for it to reach its true final hardness. The initial hardness is there after a few hours, after one day it can be walked on. What concrete does not like is if the water dries out too quickly, for example in blazing sun. It needs the water to react. Otherwise, it becomes crumbly. Not truly hard. The chains become too short. Therefore, I consider the thunderstorm downpour harmless. The reaction process has begun. The concrete has not turned into mush and run apart. The water does not harm the reaction. It is very hygroscopic, whatever it needs for the reagent it will already get. The rest will dry off. Karsten