Floor grinding

[Canski]

Some of you may remember the cock up of a cemfloor that I had pumped in last year with dips and cracks etc. 
Well now the time to get it flat is coming near and I need to start thinking about getting it flat prior to tiling and wood flooring. 

I have a couple of areas ( around 5m2) that are about 15 mm low and a  bump in the middle ( around 3 m2) that is around 10 mm high. In addition to this the whole surface has stones sticking up around 2 - 3 mm above the flat surface of the concrete. 
 

I intend to use a decoupling membrane under the tiling and an approved underlay under the engineered oak flooring. 

My questions are :-

 

What machine have you guys used to grind the floors down ? Will I do it in a day ( 85 m2) ? I’d like to use a window of opportunity given to me by a delay in my plasterers returning. 
 

Would it be ok to level the floor using levelling compound between the raised aggregates after removing the high spots or should I try to grind them out ?

[nod]

I’ve a couple of these machines and we use them on a weekly basis Mine are both aitechs But speedy to two different ones Get the larger Get it all marked out prior to hire and you will easily do 85m2 in a day 
Don’t forget to hire a 30 amp transformer and lead 

[Canski]

3 hours ago, nod said:

I’ve a couple of these machines and we use them on a weekly basis Mine are both aitechs But speedy to two different ones Get the larger Get it all marked out prior to hire and you will easily do 85m2 in a day 
Don’t forget to hire a 30 amp transformer and lead 

Thanks Nod I have the transformer and leads. I was planning on setting the laser up and dipping the whole floor prior to the battle to highlight the high spots. What do you think about the raised aggregates ?

[nod]

Raised aggregates look great 

But are difficult to repair if damaged