Concrete screening this is a product derived from recycled and crushed concrete to make a good base for pavers. a base of 4 to 6 inches of well-compacted concrete screening provides a sturdy and stable foundation for nearly any type of paver installation. you can top with a layer of sand to provide a smooth, level surface for supporting.Crushed concrete #57. #57 concrete, also known as recycled crushed concrete, is an eco-friendly material that is not only economical in price, but can also be used in a variety of landscaping projects. slm offers sturdy and versatile crushed concrete tampa bay homeowners and landscapers look for. this particular variety is crushed to about ”, and it is typically used for concrete mix, landscaping and.