The enhancement of nanofillers on the mechanical properties of cement composites.

Nanofillers	Optimal dosagea (wt%)	Enhancement of the mechanical properties in 28 d (%)		References
		Compressive strength	Flexural strength
Nano silica (nano-SiO2)	2	10.1	11.0	Shi et al.55
Nano-alumina (nano-Al2O3)	1	18.46	6.27	Ge et al.56
Nano-calcium carbonate (nano-CaCO3)	2	3.23	4.68	Cosentino et al.57
Nano-titanium oxide (nano-TiO2)	0.75	19.33	15.1	Salman et al.58
Carbon nanotubes (CNTs)	0.05	6.4	10.1	Du et al.59
Graphene oxide (GO)	0.03	5.16	21.86	Liu et al.8
Hydroxylated-graphene (HO-G)	0.03	21.19	7.89	Yuan et al.30
Hybrid GO/HO-G	0.03b	40.2	17.5	This study

^aBased on the weight percentage of cement weight.

^bThe mass ratio of GO to HO-G was 5 : 5 (0.015 wt% GO + 0.015 wt% HO-G).