Figure 1: (A) Geopolymer nanocomposites incorporating graphene-based nanomaterials in the presence of (OH-), epoxy (Ep-), and carboxyl (COOH-) groups as a contribution of defects on its surface. (B) Cementitious nanocomposite of tobermorite 14Å with intercalated hydroxyl/rGO and epoxy/rGO layers.