Rock Products

MAY 2018

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Page 68 of 75 ROCK products • May 2018 • 67 The Slag Cement Association (SCA) presented the 2017 Proj- ect of the Year Awards at the American Concrete Institute's Spring Convention in Salt Lake City. Each project was selected by the SCA's Technical Marketing Committee because of its exemplary and innovative uses of slag cement in concrete mix design. Awards were presented in the following categories: Architectural, Durability, Green Design, High Performance, Innovative Application and Sustainability. "The SCA's awards program does a great job of showcasing how versatile slag cement can be, and how it can help create stronger, more durable, and sustainable concrete structures," said Ed Griffith, SCA president. "These case studies are a great resource for the industry." Barrier One Headquarters – Winter Garden, Fla. Member Company: Lehigh Hanson Category: Architectural This building is using 50 percent slag cement in all concrete applications, including foundation, slab-on-grade, paving, sidewalks, casting beds and tilt-up panels. The concrete over- achieved required strength designations and the slag cement also helped contribute to the superior performance of the tilt-up concrete where early lifting strength was required. I-91 Brattleboro Bridge – Brattleboro, Vt. Member Company: LafargeHolcim Category: Durability Standing 100 ft. above the West River valley, Vermont's first cast-in-place segmental concrete bridge carries Interstate 91 over Vermont Rt. 30 and West River. Slag cement was used in mass concrete pours and in ternary mixtures to increase bridge strength, reduce permeability and to improve the workability of the concrete. Ecole Kenwood French Immersion Elementary School – Columbus, Ohio Member Company: Votorantim St Marys Cement Category: Sustainability More than 20 percent slag cement was used as a portland cement replacement to enhance color and reduce overall con- crete costs. Slag cement also helped create a more sustainable building by using recycled, local materials and contributes to the buildings overall durability. NVIDIA Building – Santa Clara, Calif. Member Company: Lehigh Hanson Category: Green Design With a unique triangular-shaped design, this building was created with a major focus on seismic activity concerns within the Northern California region. Approximately 65 percent of the concrete consists of 20 to 30 percent slag as a cement replacement. The use of slag cement also helped reduce the building's environmental impact, resulting in an approximate savings of 6.7 million pounds of carbon emissions. Panorama Building – Miami Member Company: Lehigh Hanson Category: Architectural This 83-story, mixed-use building uses slag cement in more than 13,000 cu. yd. of mat foundation concrete – all vertical elements – and 50 percent of the elevated decks. The slag PCA Spring Forecast: Modest Growth Ahead The Portland Cement Association (PCA) released its annual Spring Forecast, which envisions modest growth for cement consumption over the next two years. PCA's Market Intelligence Group estimates consumption to grow by 2.8 percent in both 2018 and 2019, and then to climb by 4 percent in 2020 as impacts from potential federal infrastructure spending are likely to take effect. The analysis estimates consumption at 99.3 million metric tons in 2018, 102.1 million in 2019 and 106.1 million by the end of 2020. A variety of positive economic factors – such as a strong economy, job market and anticipated increase in infrastruc- ture spending – "suggest a modest acceleration in real GDP, construction markets and cement consumptions," said Ed Sullivan, PCA senior vice president and chief economist. The PCA analysis projects that robust infrastructure spend- ing isn't likely to occur until the fourth quarter of 2019, given the key steps that must occur including passage of an infrastructure bill, federal and state paperwork, bid letting and review, and finally contract awards leading to construction. Whatever infrastructure plan actually materializes, "it will take time to implement a construction infrastructure pro- gram from passage in Congress to the first shovel. This is an aspect often neglected by many economists," Sullivan noted. "PCA has evaluated the time each process takes to impact actual construction activity. As a result, the timing of PCA's impact of an infrastructure program on actual construction is later than most economists estimate." While interest rates and inflation are expected to see slight increases, consumer debt is low – thereby adding to potential growth in consumer spending. "These factors suggest a modest acceleration in real GDP, con- struction markets and cement consumption," said Sullivan. "Add in benefits from tax reform and we will likely see the economy improving at a more brisk pace." Slag Cement Awards Honor Unique U.S. Projects

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