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NIST spells role of ground limestone in optimizing mixture paste content

Sources: National Institute of Standards and Technology (NIST), Gaithersburg, Md.; CP staff

Keen on lower carbon alternatives to portland cement-only binders, the U.S. Department of Commerce-backed NIST has published Technical Note 1906, Minimizing Paste Content in Concrete Using Limestone Powders – Demonstration Mixtures. Researchers cite target performance levels in concrete mixtures with up to 28 percent lower portland cement content using a binary blend with limestone powder.

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ASTM Committee on Vehicle-Pavement Systems ponders sidewalk smoothness standard

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

ASTM Committee E17’s proposed WK41917, Practice for Computing Pathway Roughness Index from Longitudinal Profile Measurements standard describes a method to collect and analyze sidewalk slab roughness data. Roughness can make sidewalks uncomfortable and risky for wheelchair and wheeled-walker users, parents pushing strollers and postal carriers with three-wheeled carts, the committee contends.

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Heidelberg maps Italcementi integration for home turf, mum on North America

Sources: HeidelbergCement AG, Heidelberg, Germany; CP staff

iLab 150Advancing a proposed merger with mid-year target, HeidelbergCement Chairman Dr. Bernd Scheifele announced plans to restructure Italcementi S.p.A. operations, principally at its Bergamo, Italy, headquarters and affecting upward of 400 employees through 2020; consolidate global technical activities at Italcementi’s i.Lab Research & Innovation Centre, a Bergamo facility opened in 2013; and, maintain the Italcementi brand plus homebased plants and industrial network.

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Rocla dedicates concrete tie plant strategic to Florida and Southeast rail networks

Sources: Rocla Concrete Tie, Inc., Denver; CP staff

Rocla has commenced production at a Ft. Pierce, Fla., operation equipped for up to 1,000 prestressed concrete railroad ties per day. Opened on schedule along the Florida East Coast Railway (FECR) rail network, the facility “is considered to be the most technologically advanced in the country,” notes Rocla Vice President–Business Development Brett Urquhart.

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Troesh Foundation to match up to $3M in RMC Foundation pledges

Source: Ready Mixed Concrete Research & Education Foundation, Silver Spring, Md.; CP staff

The Troesh Family Foundation, backed by founders of southern California’s Robertson’s Ready Mix, has pledged up to $3 million to the RMC Research & Education Foundation (RMC Foundation), matching on a 1:3 basis new commitments from the industry over the next five years.

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