Posted on: 27 February 2018
As far as crushed stone products are concerned, the U.S. leads the way in crushed limestone. Limestone is extensively found in most parts of the U.S., but it is most easily mined in the northern half of the country, particularly in areas where the last major glacier covered the land and then receded north. Crushed limestone is present in practically everything around you, and here is why.
It Is the Go-to Product for Making Cement
Every concrete and cement contractor relies on limestone for making cement. The crushed limestone gives the cement a denser consistency than concrete, and the bits of limestone help the liquid parts hold together long enough to harden. Without the crushed limestone, there would be dozens of structures that would remain unbuilt, and most construction would not be possible.
It Is Very Common
Limestone is very common in the U.S. It is also easily mined and easily blasted from a quarry. It is so common, in fact, that many hundred-year-old homes utilize quarried blocks of limestone for the foundation. Rather than pour cement or concrete walls and a slab floor a century ago, people just bought tons of quarried limestone and had a mason rough-hew it into blocks. You can tell which homes around you have limestone foundations by how the block foundations look.
It Is Very Durable
Limestone is very durable. It is a sedimentary rock that is extremely dense and quite heavy. Even if you pick up a piece of it in your hand, you can feel the weight of the rock. It is very telling as to how heavy a much larger chunk of limestone is. In fact, to turn large chunks of limestone into crushed stone, you need to place it into a machine that is designed to break up dense, heavy chunks of stone that refuse to yield to other means of breaking up rock.
To Get to Other Types of Rock, All the Limestone Has to Be Quarried First
If you want to get to other types of rock below the limestone, you have to quarry all of the limestone first. Limestone lays in layers over the top of all the layers that predate the coming of glaciers during the last ice age. The limestone layers were pushed up from the ground to lay as they are now. You cannot get through the limestone without blasting and hauling it away, and then you can expose types of striated rock underneath that may be even more valuable.Share