CLEANING! The Tardis build begins!

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No. It's not cement.
Concrete is made of:
1 part cement
2 parts sand
3 parts stone, usually blue metal.
Water to required consistency.

Pour in boxing or mould.
Smooth top
Spread slurry to get a level surface.
This buries the stone aggregate and gives a smooth sand cement top layer.

There is no way your floor is sand and cement only (otherwise known as mortar, or stabilised sand if you scrimp in the cement)
And cement by itself? Brittle useless stuff.

Grind off the top, it will look similar.
Look, it depends on your concreter. My SIL has floors where there are 'blooms' of aggregate, giving way to deserts of sand.
My floor has some 'L' shapes of sand caused by knee boards that sunk a little deep.
Your edges probably slope off too, as this shrinks the most. The last 3-6 inches of slab will remain unpolished here (I could go deeper, but the edge is unimportant) because of that.
 
My concrete is ground, sealed with a penetrating sealant, it seals all the way through.
It's then ground, hardened, ground again

Rinse and repeat with lighter and lighter grits, until it shines.

This is expensive. (I know a guy) it uses $85 in grinding pads per sqm (a bit bigger than a sq yard, or about $850 per 'square')

That said.
You can grind it once, then put a lacquer seal on it that lasts between 2-10 years depending on traffic, before needing to be sealed again.
This costs about half as much, but requires maintenance.

Cracks, unless structurally problematic, give character, and don't effect the finish.

The think I like most, when comparing to the alternative of tiling, is there are no grout lines to deal with, no place for gunk or funk to gather.
 
Considering that even a "cheap" laminate wood floor (done correctly) can cost well into the thousands for a small space, polishing isn't a bad value. Lets see that laminate floor in 5 year's time. NO contest.
 
Cool! My version of Tardis/man cave is finally coming along....a medieval room and decor

Polished concrete seems like the ideal floor for such a room. You can even have it tinted to mimic whatever rustic stone you desire.


Sent from my galafreyan transdimensional communicator 100 years from now.
U g
 
Usually you would add coloured aggregate if you wanted to colour it.
You can even place glasses and bottles in the floor.

My TARDIS is taking shape again.
This time it's taking on strength to support the two floors now above it.
 
Columns are a good thing. They make for character and a place to hold swords or laser weapons.


Sent from my galafreyan transdimensional communicator 100 years from now.
U g
 
Beautiful! I want one that's smaug holding the glass in his greedy gold loving mouth.


Sent from my galafreyan transdimensional communicator 100 years from now.
U g
 
I'm currently on a wood kick. I love the wooden squares used to drink cold sake. I'm currently figuring out a few pint sized mugs made out of the same wood. I am trying to find a local supplier that can get me the hinoki wood they use in Japan.


Sent from my galafreyan transdimensional communicator 100 years from now.
U g