The high cost of primary construction materials such as cement. and increase in waste generation due to human activities coupled with environmental concerns has led to the incorporation of wide range of waste materials into asphalt concrete. Waste foundry sand (WFS) which is a by-product of ferrous and non-ferrous metal casting industry. has accumulated in stockpiles and landfills. https://www.findingthestory.com/product-category/regulator-parts/