A small ally fights back against China and Russia’s threat to energy security / Jüri Seilenthal
A small ally fights back against China and Russia’s threat to energy security / Jüri Seilenthal
Double Trouble – Canada’s troops in Latvia: Balkan Devlen, Alexander Lanoszka, and Toms Rostoks

Publishing On Cement Decarbonization Brings Challenges, Corrections, & More Approaches [Video]

Categories
China News Japan News Philippines News South Korea News Vietnam News

Sign up for daily news updates from CleanTechnica on email. Or follow us on Google News!

A few days ago I went deep on cement again, using an assessment of the processes of American clean cement startups to define the scope and magnitude of the problem, the chemistry and energy requirements of cement, why fixing it is critically important, and incidentally evaluate a couple of companies’ offerings.

The CliffsNotes — FreeBookNotes in China is the closest approximation — of that deep dive is pretty straightforward. Limestone is incredibly cheap and widely spread because it’s dead shellfish and precipitated calcium ions from long vanished oceans. Deposits hundreds of square kilometers and a hundred or more meters deep are near or on the surface all over continents globally.

We quarry limestone cheaply because it’s a softer, sedimentary rock and exists almost everywhere we need cement, so transportation costs are low. We heat it in kilns to 900° Celsius to break down its …

Canada
Canada's Indo-Pacific Strategy in a quickly changing world / Jeff Kucharski / MLI in Parliament
Social media addiction behind youth mental health crisis