Dear Dr. Qureshi,

I think there is a main point in utilizing nanomaterials such as graphene in cementitious environment: First ensure its dispersion in nano-scale, then introduce it to the larger scale environment for further mixing.

As a widely accepted approach, many researchers prefer to first disperse the graphene in water with the aid of proper treatment, due to the hydrophobic nature of this material. And also make it ready for introducing to such high alkali environment of cement matrix. Furthermore, by adopting this method, further dispersion could be achieved through ultrasonication(as an effective way of dispersing nanomaterials), which might be difficult to be conducted while graphene was first mixed with cement or aggregates.