Summary of Results 

Our multilayer graphene increased both the compressive strength and flexural strength of both concrete and mortar and after 7 as well  as 28 days. Consistent improvements of compressive strength were up to 35% and flexural strength were up to 25% 

The best results of the compressive strength were obtained by the following:

1. Water to cement ratio of 0.35 and 0.4, that proved to give somewhat better results when compared to 0.45. 

2. SPZ to cement weight ratio of 1.5 %. Any higher ratio did cause reversed effects.

3. Consistent good results were obtained using graphene to cement ratios of 100, 200 and 300 ppm.