2000 Sq ft Roof ( I purchased PPC cement now my contractor is telling it's weaker)

Today the casting got completed and one of my friend suggested to use wonder PPC - I used wonder PPC for my slab casting of approx 2000 sq ft.

Construction is taking place at a village area near Jaisalmer region.

My question is - is it a good decision?

Yes or No - what can I do now

I used Wonder PPC