As the title suggests. If roman concrete supposedly has the capabilities to mend tiny cracks via chemical reaction, why isn’t it used with modern reinforcements to seal the pathways to the steel beams to protect it from oxygen and elements and prevent corrosion? Are there any major downsides to hot-mixed concrete, is it not as good as the studies make it out to be, or is it simply not viable due to cost and manufacturing process/storage requirements?
We only recently figured out the method for making it, but more than that, it’s just not as strong as modern concrete. It can’t bear nearly the same load.
The thing that gives it the self-healing properties also makes it inconsistent and creates weaknesses in the material.
I’m also unsure of how rebar would react to it. The self-healing is triggered by water getting into cracks, but that would cause the rear to rust and swell.