“We’re running out of cement — and the stuff we use only lasts 60–80 years.”
https://winansinvestments.com/https://winansinvestments.com/ https://www.amazon.com/stores/Kenneth-G.-Winans/author/B001JRZSGE?ref=sr_ntt_srch_lnk_1&qid=1777043075&sr=8-1&shoppingPortalEnabled=true The second-most used material on Earth is falling apart.Portland concrete lasts 60–80 years, then cracks. A crane operator who built 13 Las Vegas hotels says we’re also running out of the sand and limestone that make it — and burning it accounts for a huge slice of global CO2.Then he points to a 900-year-old fort that still looks new… because it wasn’t Portland. It was ceramic / geopolymer cement —…
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