From the figure it is being observed that the cube compressive strength was increased upto 7.5% fiber content and after that it is decreased at  10% of the fiber content. The observations made for the cube compressive strength are as follows-

35.76 \(N/mm^{2}\) for 0% of fibers.

45.24 \(N/mm^{2}\) for 5% of fibers.

39.57 \(N/mm^{2}\) for 7.5% of fibers.

37.16 \(N/mm^{2}\)for 1.5% of fibers.

in the concrete at 28 days.

From the following observations it was concluded that the compressive strength was decreased to 35 \(N/mm^{2}\) for 10% of fiber content.