Portland cement doesn't come close to matching the resiliency of the concrete created by ancient Romans. After years of research, scientists believe they've unraveled the ingredients and production techniques that made Roman concrete so superior.
"After 2,000 years, a long-lost secret behind the creation of one of the world’s most durable man-made creations ever—Roman concrete—has finally been discovered by an international team of scientists, and it may have a significant impact on how we build cities of the future," writes Bernhard Warner.
After a decade of work, "[t]he researchers now know why ancient Roman concrete is so superior," he reports. "They extracted from the floor of Italy’s Pozzuoili Bay, in the northern tip of the Bay of Naples, a sample of concrete breakwater that dates back to 37 B.C. and analyzed its mineral components at research labs in Europe and the U.S., including at Berkeley Lab’s Advanced Light Source. The analysis, the scientists believe, reveals the lost recipe of Roman concrete, and it also points to how much more stable and less environmentally damaging it is than today’s blend."
FULL STORY: Ancient Roman Concrete Is About to Revolutionize Modern Architecture

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For decades we have blamed 100-year-old maps for the patterns of spatial racial inequity that persist in American cities today. An esteemed researcher says: we’ve got it all wrong.

Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

California High-Speed Rail's Plan to Right Itself
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Nevada and Utah Groups Oppose Public Land Sell-Off Plan
A set of last-minute amendments to the budget reconciliation bill open up over half a million acres of federally managed land to sales.

More Than a Park: A Safe Haven for Generations in LA’s Chinatown
Alpine Recreation Center serves as a vital cultural and community hub in Los Angeles' Chinatown, offering a safe, welcoming space for generations of Chinese American residents to gather, connect, and thrive amidst rapid urban change.
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