Breaking out concrete with minimum mess?

[Sparrowhawk]

We lifted some hideous vinyl to get a radiator plumbed in, to find a varnished wood floor (nice!) and a slab of concrete exactly where the pipes needed to go. We think the concrete was where the cooker stood in the 1920s kitchen.

 

The slab is about an inch thick and seems to rest on hardcore. The rest of the floor is suspended timber.

 

It would be nice to have the whole floor as wood and to insulate the entire floor. As we're living here, how could we break it out making the minimum mess, particularly keeping dust down? An inch seems thick to break up by hand, but I can see a kango turning the hallway and rooms grey.

 

And is there anything to watch out for in the makeup of slabs like this e.g. asbestos?

Edited June 19 by Sparrowhawk

[nod]

You should be able to lever it out with a bar 

Like lifting a flag 

[joe90]

If not able to lift it an Electric kango is your best bet, anything that cuts it will create more dust, does not need to be huge, it acts like a lump hammer and chisel (without the hard work), mind you hitting it with a sledge hammer might break it up enough to lift it out in pieces.

[SteamyTea]

Cheap child labour, we are allowed to do that as long as they are relatives.

[Conor]

A sledge hammer should break it up into manageable chunks. 

[Sparrowhawk]

Thanks all, I'm going to try a sledge hammer first and then hire a kango if that doesn't work.