The United States is hungry for concrete. According to the U.S. Geological Survey, in 2014 the U.S. produced 80.5 million tons of Portland cement and 2.2 million tons of masonry cement. Portland cement is a primary ingredient in concrete, and most of the cement produced domestically went to the production of concrete. Though concrete is a sustainable material the amount produced every year results in significant environmental impact, making the development of recycled aggregate sources of dire import.