I bet it wouldn’t take you long to find a piece of concrete that’s crumbling to pieces. I only have to go out onto my front porch, and my house is only 60 years old. So how could ancient Roman concrete still be standing, especially concrete breakwaters that have been pummeled by corrosive salty waves for the past 2,000 years?
The answer, says a University of Utah geologist, is in the recipe. Some volcanic ash, some lime, some seawater – but the exact proportions for making Roman concrete have been lost to time.
Read here the story about Roman concrete that was reported around the world and even caught the attention of Ira Flatow, host of Science Friday and a self-proclaimed concrete geek.
Here’s the little video I made to go along with the release. I put it together just using iMovie, and it was viewed 129,000 times.