Unusual mortar erosion

>>7700078
>>7700084
I'm guessing it's the excess insects or rodents that are attracted to your garbage.

>>7700078
shit batch of mortar,

You're essentially makin a Venturi between the wall and the can. that velocity spike is compounded by the fact that drag force (acting on the granular mortar) is a second order force so it increases with velocity^2

>>7700100
Yeah, probably something biological. Mold maybe?

>>7700166
This.

Also, that shit looks like it's about to go for a walk, does no one get their fucking walls repointed anymore? Have all the Old Ones died out and taken their knowledge with them?

>>7700078
I would say that that bins are blocking the area behind them from drying out when it gets wet and the moisture is degrading the mortar.

Ok another /x/er /pol/ack thinking they've discovered something science hasn't in the history of man.
Confirmed snowflake.

You may see this a bit. Copied it to save time

Moisture. Either evaporation or splash.

My guess (and that is all it is): mortar is being attacked by ammonia vapours from the contents of the bin. A long long time ago in a galaxy far away I was a garbage man and I can assure you that the small can be ferocious. Parts of this is ammonia.