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Acquisition of natural sand for construction and disposal of industrial by-products is becoming unattractive worldwide due to their associated negative economic and environmental impacts. The option of re-using Waste Foundry Sand (WFS) as fine aggregate in concrete offers benefits to both construction and industrial sectors. This book therefore reveals how the re-use of WFS as replacement fine aggregate can be achieved in producing concrete paver blocks that meet the quality standard specified in BS EN 1338:2003 and in ASTM 1988. It contains an assessment of the physical and chemical properties of Green and Chemically Bonded WFS and their effects as partial replacement of fine aggregates on concrete properties such as compressive strength, tensile strength and water absorption. Based on the findings detailed in the book, the reuse of green or chemically bonded waste foundry sand as fine aggregate for high strength concrete such as making of concrete paver blocks is recommended atthe stated proportions. The book should offer more information to stakeholders in the construction industry and environmental protection organization so as to achieve the stated benefits.