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ASTM C09 formulates colloidal silica standard

Sources: ASTM International, West Conshohocken, Pa.; CP staff

The proposed New Specification for Colloidal Silica for Use in Concrete (WK60809) under ASTM Committee C09 on Concrete and Concrete Aggregates will cover a versatile nanoparticle imparting durability characteristics in slabs and structures.

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EPD data-fueled embodied carbon tool debuts at Greenbuild

Sources: Carbon Leadership Forum, Seattle; CP staff

The Carbon Leadership Forum (CLF), a University of Washington College of Built Environments-hosted coalition of architecture, engineering and construction stakeholders, formally launched the Embodied Carbon in Construction Calculator (EC3) tool in public beta version at the U.S. Green Building Council’s Greenbuild International Conference & Expo in Atlanta. Embodied carbon volumes reflect carbon dioxide emissions attributable to material or product processing, fabrication, delivery, and erection or placement. 

Read more: EPD data-fueled embodied carbon tool debuts at Greenbuild

Top engineer validates structural elements’ embodied carbon

Sources: Thornton Tomasetti, New York; CP staff

A global engineer’s seven-year survey of 600-plus buildings assesses materials, structural components and facility types with the highest embodied carbon, and cites a market-driven trend toward increased use of supplementary cementitious materials and recycled steel as the largest driver of a reduction in that metric. 

Read more: Top engineer validates structural elements’ embodied carbon

SF Bay Area county approves premier low-carbon concrete code

Sources: Sierra Club California; CP staff

The Marin County (Calif.) Board of Supervisors unanimously adopted an ordinance that adds a low-carbon concrete specification to the county’s building code, effective January 1, 2020. The new code applies to concrete mix designs for all private and public construction projects, and includes pathways for compliance with either reduced cement levels or lower-emission supplementary cementitious materials. 

Read more: SF Bay Area county approves premier low-carbon concrete code

Incident rate in ready mixed production remains at decade trough

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

Just-released U.S. Bureau of Labor Statistics 2018 workplace injury and illness data show a ready mixed concrete industry incident rate of 3.9 in 2018, unchanged from the prior year. Over the past decade, the injury- or illness-rooted lost work time benchmark among producers has ranged from the 2017-18 lows to 6.3 in 2014.

Read more: Incident rate in ready mixed production remains at decade trough