While today’s cement is made through extremely high temperatures in a kiln, ancient Romans didn’t have that option. Still, anyone who’s been to Rome recently will tell you that ancient cement seems to have held up just fine.The startup Sublime Systems thinks the Romans were onto something. The MIT spinout has created a drop-in replacement for today’s most commonly used cement, known as portland cement, that uses electrochemistry to skip the ultrahigh temperatures of conventional production — and the immense carbon dioxide emissions that go with it.“Romans couldn’t go to…
