ICPI 25th Anniversary Commemorative Publication ICPI 25th Anniv Commemorative Album 0219 web - Page 6

The illustration below shows recent construction methods. New pavers are set, or existing ones removed from Dutch roads with loaders and the base is raised. Worn, unusable pavers are culled out and the remaining reinstated using this type of machine. Initially, concrete pavers in The Netherlands were considered inferior to vitrified clay pavers. With pricing lower than clay pavers, quality improved during the late 1950s and 1960s. By the end of the 1970s, about 161,000,000 sf (15 million m 2 ) were being produced annually. Today, the market is about 270 million sf (25 million m 2 ) including pavers and slabs, or about 8.6 sf (0.8 m 2 ) per capita. The Dutch paver industry began to develop standards to satisfy the need by municipalities to rehabilitate streets with consistent construction methods and durable pavers. Since 1966, Dutch manufacturers supplying municipal projects must make pavers that meet national standards. They maintain a certification program called KOMO, a Dutch acronym for Netherlands Foundation for Research, Approval and Certification. KOMO certificate holders have their pavers tested by independent laboratories to verify conformance to national product standards. Today, about one-third of all paved surfaces are concrete block paving better known in the New World as interlocking concrete pavement. The primary applications are residential streets and very heavily loaded industrial areas and ports. Modern construction or reconstruction of roads in the Netherlands avoid strenuous work by the installation crew thanks this paving machine. Interlock is demonstrated with the suspended herringbone laying pattern that’s about to be placed on bedding sand. PHOTO CREDIT: REDDIT.COM 4 • I C P I C O M M E M O R AT I V E P U B L I C AT I O N