The Interlocking Concrete Pavement Institute (ICPI) represents the concrete paver industry in the US and Canada. Contact their site for technical bulletins, brochures, manuals, a/v resources, plus design and construction detail software. 

The National Concrete Masonry Association (NCMA), established in 1918, is the U.S. trade association representing the concrete masonry industry. The Association is involved in a broad range of technical, research, marketing, government relations and communications activities.