The Romans used volcanic ash (chemically neutral) instead of Portland cement (acidic), which is why their concrete structures have lasted for millenia, while ours start to crumble within a decade. Our only problem with that is that we don’t have enough volcanos to supply the world with concrete. At least the…

As our infrastructure crumbles basically simultaneously all over the country we are taking a LOT of lessons learned from the last cycle of major work and applying it to new projects. There are advances in materials and also advances in how the projects are being bid so as to include products that are much longer…