ICPI 25th Anniversary Commemorative Publication ICPI 25th Anniv Commemorative Album 0219 web - Page 17

This rustic look enhanced backyard environments, e.g. outdoor kitchens or living rooms plus driveways. These were emerging quickly often enhanced with pergolas, accent lighting, SRW planters, fire pits, bars, sinks, fridges and pizza ovens, fountains, hot tubs, and swimming pools. An outdoor room could be added at a fraction of the cost of an enclosed house addition. The stone trend transitioned to smoother finishes in the 2000s and larger slab units that conveyed a more refined and calming appearance. Today, about 80% of all concrete paver sales are to residential uses. Emergence of Other Industry Groups In the late 1970s, U.S. and Canadian paver manufacturers realized a need for an industry association to encourage sales to design professionals and specifiers. This effort was called the Interlocking Paver Manufacturing Association or IPMA. The group advertised in national magazines for design professionals that included a listing of the members. The members were: Balcon, Baltimore, MD Concrete Paving Stones, Portland, Oregon (Later purchased by Willamette Graystone) Landscape Products, Wilbraham, MA Muller Supply in Lodi and Banning, CA Paver Systems, Lake Worth, FL R.I. Lampus, Pittsburgh, PA Reading Rock, Cincinnati, OH Wausau Tile, Wausau, WI The National Precast Manufacturing Association (NPCA) based in Indianapolis, IN, was influential in the developing paver industry in the early 1980s, Canadian manufacturers supported the NPCA since most did not (unlike some U.S. paver producers) manufacture concrete masonry units. Most Canadian paver manufacturers initially used multi-layer equipment to produce pavers, not having masonry block machines. The first NPCA paver committee was chaired by Canadian Wolf Mueller whose committee developed the first ASTM standard for concrete pavers, C936 Standard Specification for Solid Concrete Interlocking Paving Units. This standard was approved and first published by ASTM in 1982. Since many of the initial paver producers in the U.S. manufactured concrete masonry units, many were members of the National Concrete Masonry Association (NCMA) based in Herndon, VA. NCMA formed a paver committee in 1979. In a parallel effort and somewhat competitive spirit with NPCA, the NCMA committee also began writing an ASTM standard for concrete pavers. The two groups proposed different compressive strength standards, 8,000 psi (55 MPa) by NPCA and 7,250 psi (50 MPa) by NCMA. Significantly higher strengths of pavers than typical concrete masonry units made on block machines required machine modifications, additional production time and expense. However, that expense was less than that required to purchase a multi-layer machine. A sampling of elegant product catalogs from paver manufacturers. Most communicated a luxurious lifestyle to potential homeowner customers. 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 • 1 5