Additionally, future research efforts are suggested to tailor the
weight ratio of cement:silica fume:supplemental material of
1:0.25:0.25 in terms of performance versus cost ratio. A reduction
in the amount of the most expensive material and an
increase in the amount of the least expensive material might
lead to a further improvement in performance versus cost.
This optimization was not the scope of this research project
and has been left for future research efforts.