Paving stones are building stones such as stones, stones and slates used by people to build, rebuild and build roads (including highways, railways and sidewalks). Stones and slates are generally used for paving roads, while stones are mixed with cement and other materials as subgrade, pavement and other aspects.Paving stones are building stones such as stones, stones and slates used by people to build, rebuild and build roads (including highways, railways and sidewalks). Stones and slates are generally used for paving roads, while stones are mixed with cement and other materials as subgrade, pavement and other aspects.