What recycled materials are used in cement production?
A. While maintaining superior quality, the use of raw materials has been significantly reduced by replacing them with recycled industrial byproducts. The industry has also reduced its own waste by recycling more than 75 percent of cement kiln dust (CKD) nearly eight million tons each year directly back into the cement kiln as raw material. By doing so, manufacturers conserve energy and reduce use of limestone and other virgin raw materials.
