Concrete Products

MAY 2017

Concrete Products covers the issues that attract producers of ready mixed and manufactured concrete focusing on equipment and material technology, market development and management topics.

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24 • May 2017 NEWS SCOPE MATERIALS The Slag Cement Association has pro- grammed a calculator with which concrete producers can quantify and interpret cra- dle-to-gate life cycle assessments (LCA) reflecting the environmental impact of mixtures with and without slag cement. Cal- culations are based on the industry-average Environmental Product Declaration (EPD) for ready mixed concrete that incorporates industry-average EPDs for slag cement and portland cement in the United States. The calculator also allows users to evaluate how different concrete mixtures affect whole building impacts based on a typical case study project. "This is a great tool for the ready mixed concrete industry because producers can immediately demonstrate to owners and developers how the use of slag cement can help positively impact the environmental footprint of a structure or building," says SCA President Ed Griffith. "Industry profes- sionals can use the LCA calculator to help earn points through the LEED green building rating system." The first of four calculator sections allows users to select from a list of preset concrete mixes and alter the percentage of slag cement. Graphed results show the impacts for baseline and slag cement-mod- ified mixes in real time and enable users to apply region-specific supply chain char- acteristics. Users can also enter up to 10 custom mix designs for individual envi- ronmental impact calculations; in turn, practitioners can benchmark those mixes as a percentage of region-specific industry averages. The calculator can also be used to detail slag cement's impact on a building as a whole, allowing users to enter amounts for each custom mix earmarked on a given Calculator performs life cycle assessment for slag cement concrete NON-HYDRAULIC CEMENT STANDARD The inaugural gathering of stakeholders exploring non-hydraulic alternatives to port- land cement is set for June 15 in Toronto, amid ASTM International C01 Committee on Cement meetings. C01 has organized a subcommittee to develop standards for the materials, recognizing design, engineering and construction professionals' interest in new concrete binders. Committee mem- bers invite cement and concrete producers, contractors and other parties interested in non-hydraulic cements to join the subcom- mittee. C01 Committee Week meetings run June 14-15. Contacts, technical, Larry Sutter, Michigan Technological University, 906/487- 2268,; staff liaison, Scott Orthey, 610/832-9730, Along with slag cement, Argos USA supplied 16,000 yd. of concrete for the St. Pete-Clearwa- ter International Airport terminal apron expansion. Sears Ready Mix supplied 1,300 yd. of con- crete designed with 40 percent slag cement factor for an oceanfront home. project. The Life Cycle Assessment Calculator for Slag Cement or a companion EPD can be obtained free of charge at www.slagcement. org. SCA PROJECT AWARDS The association named eight Slag Cement Project of the Year Award recipients during the American Concrete Institute Spring Convention in Detroit. "The construction industry should look to these examples as case studies for the increased durability, resilience and sustainability slag cement brings to a concrete mix design," noted Griffith. Member producers and the projects they supplied by category are Argos USA LLC, St. Pete–Clearwater International Airport, Sustainability; LafargeHolcim, Oceanfront Residence, Architectural, Revive I-275, Dura- bility, University of Notre Dame Campus Crossroads, Green Design, and Ten Hudson Yards, High Performance; Lehigh Hanson, The Rowan, Architectural, and SLS Lux, High Performance; and, VCNA St Marys Cement Inc., Ohio DOT Route 6 Bridge, Innovative Application. Ninety percent of the concrete Miami's Su- permix supplied for the 57-story SLS Lux tower was designed with 40 or 50 percent slag cement factor. Central Concrete Supply delivered 5,200 yd. of ready mixed, designed with Lehigh Han- son slag cement at 34 percent of net binder, for The Rowan in San Francisco. PHOTO: Aerial Innovations

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