They reason concrete is used is because it is CHEAP and it has good compression strength when cured. It is also very heavy. Why not just build all our multistory buildings out of granite? It has good compression strength, is pretty and will last for 3000 years.
On the other hand. Lets build all our buildings out of graphite, titanium and Kevlar. I am sure a Kevlar building would be much stronger than steel, concrete or cellulose based materials.