Yes, there are some papers that suggest that adding graphene-like elements to for example concrete will make them stronger. I think that if we can find a carbon neutral process of creating graphene it could be a great additive and a carbon sink (finally making a useful product out of carbon). It can even be used to detect damages in concrete (electrical resistivity value reduces at maximum compressive load). Here is an interesting paper: www.mdpi.com/2071-1050/9/7/1229/pdf but there are more applications once you start looking.