During many years I have been trying to make a good machine base. After several trials we achieved exactly this 3 years ago.
The following pictures show our base with 2 tons for a CNC machine that we make in small series.
Currently we finished the production of those machines and I have leftovers that others can use to make a smaller project.
If you are interested let me know. I have 225Kg (9 bags of 25 Kg each) of special cement available and some super plastifier. The cement is sold to us in multiples of 1 ton.
I can also provide the formula that we used if anyone is interested on this.
Video link: