Interlocking concrete pavements or pavers are a special dry mix pre-cast piece of concrete commonly used in exterior hardscaping pavement applications. Unit Pavements or block paving, nicknamed pavers in the United States were developed prior to WWII by the Dutch and introduced into the United States in the early 1970s. Interlocking paving stones are installed over a compacted stone sub-base and a leveling bed of sand. Concrete paving stones can be used for walkways, patios, pool decks and driveways and airport or loading docks.
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in section "Laying of paving slabs (cabes)"