3D-printed concrete specialist to keynote agency’s two-day, online conference

The U.S. Department of Commerce’s National Institute of Building Sciences has replaced its Washington, D.C. conference this year with Building Innovation 2020: Virtual Edition, billing the August 18-19 program as “a powerfully compact event, focusing on technology, workforce, resilience and Covid-19.”

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Ground limestone exhibits mixture paste content optimization potential

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Keen on lower carbon alternatives to portland cement-only binders, the U.S. Department of Commerce’s National Institute of Standards and Technology 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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