Driveway Slag is a co-product produced at the steelmill. It varies in size with the largest being about 1 1/4" in size. The smallest is granular and even sometimes powder like.

Slag is a partially vitreous by-product of smelting ore to separate the metal fraction from the unwanted fraction. It can usually be considered to be a mixture of metal oxides and silicon dioxide.

In nature, the ores of metals such as iron, copper, lead, aluminium, and other metals are found in impure states, often oxidized and mixed in with silicates of other metals. During smelting, when the ore is exposed to high temperatures, these impurities are separated from the molten metal and can be removed. The collection of compounds that is removed is the slag. In many smelting processes, oxides are introduced to control the slag chemistry, assisting in the removal of impurities and protecting the furnace refractory lining from excessive wear. In this case, the slag is termed synthetic. A good example is steel making slag: quicklime and magnesite are introduced for refractory protection, neutralising the alumina and silica separated from the metal, and assist in the removal of sulfur and phosphorus from the steel.

Ferrous and non-ferrous smelting processes produce different slags. The smelting of copper and lead in non-ferrous smelting, for instance, is designed to remove the iron and silica that often occurs with those ores, and separates them a an iron-silicate-based slags. Slag from steel mills in ferrous smelting, on the other hand, is designed to minimize iron loss and so mainly contains oxides of calcium, silicon, magnesium, and aluminium. Any sandy component or quartz component of the original ore automatically carries through the smelting process as silicon dioxide.

We can spread your slag too! But there is no guarantee just how it will turn out. There are certain conditions that make it easy for us to do this.

1. There can not be ANY overhead wires within 16 feet of the ground. The raised bed will catch these wires and damage the wireand our truch.
   
2. There can be NO overhead tree branches. They also will damage our truck.
   
3. Any pot holes should be filled with slag BEFORE we spread it with our truck. We can do this with an additional labor charge.
   
4. The ground can not be slippery, muddy, soft, or otherwise unfit for our truck to safely travel on. If you tell us where to put the load and we can not put it there. We will dump the load as close as we can and you will have to spread it another way.
   

Before  the driveway slag

But we do have the equipment to spread the slag if you want us to.