PCA programs portland-limestone cement promotion

carbon calculator

Sources: Portland Cement Association, Washington, D.C.; CP staff PCA’s just-launched microsite, www.greenercement.com, supports the use of portland-limestone cement (PLC), which performs in concrete at levels comparable to Type I portland cement, but exhibits a greenhouse gas emissions profile up to 10 percent below clinker-only powder. The site accesses a calculator where design and construction professionals can input building size or…

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Ready mixed producers cut carbon footprint by double digits

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Data behind a new National Ready Mixed Concrete Association life cycle assessment report for cast-in-place concrete shows how ready mixed producers, through more efficient use of portland cement, have cut the respective carbon footprints of 4,000- and 8,000-psi orders by 13 percent and 20 percent since 2014. Armed with results from a survey of 155 member producers operating 1,954 ready mixed plants, the association analyzed data on material throughput and other metrics reflecting net energy consumption in slabs or structures.

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Ready mixed producers quantify double-digit carbon footprint cut

Sources: National Ready Mixed Concrete Association, Alexandria, Va.; CP staff

Data behind a new NRMCA life cycle assessment report for finished concrete shows how ready mixed producers, through more efficient use of portland cement, have cut the respective carbon footprints of 4,000 psi and 8,000 psi orders by 13 percent and 20 percent since 2014. The association surveyed 155 member producers representing 1,954 ready mixed plants, analyzing data on material throughput and other metrics reflecting net energy consumption in slabs or structures.

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Paying attention to the carbon footprint behind the wood curtain

“Determining the Carbon Footprint of Wood” (PCA R&D 3287) is a valuable work based on Portland Cement Association-sponsored research. The timely report tracks trees and forests’ carbon dioxide-sequestering capacity, one of the value propositions wood building product interests channel to green-building practitioners; paints rationale for the wood industry to document carbon accounting methods transparently, especially when product is not sourced from a sustainably managed forest; and, helps cast-in-place concrete, precast and masonry construction practitioners respond to competitors’ claims of environmental mettle.

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CalStar begins production at two-line, Mississippi masonry plant

CAPTION:The cast stone products are made with CalStar’s proprietary process that incorporates up to 37 percent recycled content and eliminates the need for portland cement; calcium silicate materials, which require energy-intensive autoclaving; or for kiln-firing, typical of traditional clay brick. When measured against portland cement and clay alternatives, each CalStar product requires up to 81 percent less energy to make while emitting up to 84 percent less carbon dioxide.

CalStar Products has begun delivering building and landscape units from a 100,000-sq.-ft., Columbus, Miss., operation—an ambitious satellite to a Racine, Wis., flagship plant opened in 2010. With dry- and wet-cast lines for brick, trim and paver products using proprietary binders and high fly ash content, the facility sits on 23 acres in the Golden Triangle Industrial Park.

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Filter press line solidifies Enviro-Port reclaiming role

A filter press series from D.R. Sperry & Co. of Aurora, Ill., has joined Enviro-Port’s line of concrete reclaiming and slurry handling equipment.

A filter press series from D.R. Sperry & Co. of Aurora, Ill., has joined Enviro-Port’s line of concrete reclaiming and slurry handling equipment. Filter presses enable producers to reduce settling pond sediment handling requirements and solids drying time, while also expediting the return of water for process and batch use.

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Graniterock adds carbon footprint savings calculator to iPhone app

Graniterock Construction Calculators Version 4.2 app

The Construction Calculators Version 4.2 app enables architects and contractors to gauge carbon dioxide emissions reduction when using supplementary cementitious materials to offset portland cement in concrete mix designs. The just-released update builds on one of the industry’s first mobile device-geared software products, launched in 2011, for estimating a project’s ready mixed and aggregate requirements.

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Graniterock adds carbon footprint savings calculator to iPhone app

Sources: Graniterock, Watsonville, Calif.; CP staff

Graniterock’s Construction Calculators Version 4.2 app enables architects and contractors to gauge carbon dioxide emissions reduction when using supplementary cementitious materials to offset portland cement in concrete mix designs. The just-released update builds on one of the industry’s first mobile device-geared software products, launched in 2011, for estimating a project’s ready mixed and aggregate requirements.

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Feds fund project to integrate carbon metrics in building material databases

Researchers at Colorado State University, Ft. Collins, have been awarded a $600,000 National Science Foundation grant to develop measurement and assessment tools to be integrated with building material databases and architectural design software to provide real-time, “on-the-fly” carbon footprint metrics.

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Steel interests hone pitch on industry’s carbon footprint

Sources: World Steel Association (Worldsteel), Brussels; American Iron & Steel Institute, Washington, D.C.; CP staff

Based on five years of data collection methodology applied to 200 mills worldwide, a new ISO (International Organization for Standardization) standard eases calculation of carbon dioxide emission intensity from iron and steel production.

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