Source link : https://tech365.info/reinventing-cement-by-harnessing-volcanic-chemistry-to-create-extra-sustainable-constructing-supplies/
Greener cement in motion—from clinker jar, to lab-made mortar samples, to cement geomorphic textures impressed by marble and travertine. Credit score: Jacob Lengthy | Samples: Chengyao Liang | Geomorphic textures: Mia Maria Pique
In 79 A.D., Roman writer Pliny the Elder marveled at how mud might flip to stone. “Who, indeed,” he wrote in Naturalis Historia, “cannot but be surprised at finding the most inferior constituent parts of it [Earth], known as ‘dust’ only, forming a barrier against the waves of the sea, becoming changed into stone the moment of its immersion, and increasing in hardness from day to day?”
Pliny was describing the volcanic ash from Puteoli—ash that we now name pozzolana, as fashionable Pozzuoli is the historic Puteoli—which may certainly remodel into stable stone when struck by water. This property accounts for constructing constructions of astonishing endurance, just like the Pantheon, whose concrete dome nonetheless stands almost 2,000 years later.
As we speak, the spine of on a regular basis skyscrapers and houses is usually cement. Its manufacturing forces limestone above 1,400°C in a course of referred to as calcination. This high-heat course of emits roughly 8% of worldwide CO₂, making it one of many largest industrial contributors to international warming. To fight this consequence, Tiziana Vanorio, affiliate professor of Earth and planetary sciences, is popping this historical past on its head…
—-
Author : tech365
Publish date : 2025-07-26 02:24:00
Copyright for syndicated content belongs to the linked Source.
—-
1 – 2 – 3 – 4 – 5 – 6 – 7 – 8