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Slag-Formulated Block Aces Material Optimization, Carbon Math Tests

Proving the potential of slag cement mix designs aimed at NYSCMA FM2000 block (above), Taylor Concrete cites a 100- x 200-ft. warehouse building with 20-ft. high walls

Source: Taylor Concrete Products, Watertown, N.Y.

Proving the potential of slag cement mix designs in NYSCMA FM2000-compliant block (above item), Taylor Concrete cites a 100- x 200-ft. warehouse building with 20-ft. high walls. Designed around the company's FM2000 concrete masonry unit, whose mix substitutes 20 percent of portland cement with NewCem slag, the structure exhibited a 10 percent cost economy over a conventional block design. A 30,000-lb. carbon dioxide emissions savings reflects the lowering of such material requirements as 0.8 lb. of portland cement/block, 43 yd. of grout, and 4.5 tons of rebar. Taylor Concrete correlates a productivity gain for masons to decreased reinforcement requirements attributable to the higher strength block.

Under the U.S. Green Building Council LEED (Leadership in Energy and Environmental Design) rating system, FM2000 slag block can earn points in Recycled Materials, Regional Materials, and Construction Waste Management categories, with additional credits possible under Sustainable Sites and Energy & Atmosphere. Beyond the performance block, the producer is developing a line of concrete face brick whose recycled material content and efficient curing will reduce embedded carbon by 40-50 percent against clay brick.

Taylor Concrete prioritizes energy conservation and efficiency throughout its operations. In 2009, it cut a kiln's natural gas consumption 40Ò50 percent with the installation of a new steam curing system.