> My pet theory is that that concrete allowed the Romans to construct giant projects relatively quickly with large, mostly unskilled labor pools. I wouldn't re

> My pet theory is that that concrete allowed the Romans to construct giant projects relatively quickly with large, mostly unskilled labor pools. I wouldn't really call it a theory, that's really why they used it much of the time over other building materials. No need to have professional masons cutting stone or coordinate hauling massive blocks of stone great distances. Also, their concrete was able to be poured underwater, so made building harbors and bridges far easier. http://www.uh.edu/engines/epi2810.htm http://www.uh.edu/engines/epi2810.htm