As my violin gently weeps...

anticapitalist:

A Drexel University team has created an alkali-activated cement based on  an industrial byproduct, slag, and simple limestone, and which doesn’t require heating to produce.

[…]

In contrast to ordinary Portland cement, Drexel’s cement is made of up to 68 percent unfired limestone, a plentiful, cheap, and low-carbon dioxide resource. To this base, a small amount of commercial alkali chemical is added along with the iron slag byproduct.

In Portland cement the substitute for this mixture, called clinker, is produced by firing a number of ingredients in a kiln, thus requiring more energy and generating more carbon dioxide.

“Our results and the literature confirm that it performs as well or better than OPC,” says Dr Michel W Barsoum.

This seems too good to be true.

We’ll see what happens.