A use for all that gravel... Concrete!
Since we now have all this extra gravel that will essentially be thrown on the ground because it's a waste product, why not give it a use, concrete blocks.
Large static grid only, needs a little iron. Perfect starting material to build a base out of, especially with iron being so very precious early in the new progression. Without a use for gravel, and reactor components need so little it's still not worth keeping, all it's good for is cluttering up your inventory and cargo containers.