Scientists strengthen concrete by 30 percent with used coffee grounds..

[Alan Ambrose]

https://www.engadget.com/scientists-strengthen-concrete-by-30-percent-with-used-coffee-grounds-221643441.html

 

That should save some money then 

[MikeSharp01]

Clever / neat idea but I suspect @SteamyTea will tell you how much additional energy you are going to use in taking the coffee grounds up to 350DegC and then deduct form that the mass of concrete, and its carbon content, you won't need if the resulting concrete is 30% stronger. everything is connected to everything else! 

[Onoff]

A Maxwell House presumably?

[SteamyTea]

29 minutes ago, Onoff said:

A Maxwell House presumably?

boom boom