You are able to purchase 10 kg (22.6 lbs) ready-mix tubes of concrete fro good DIY/building supply store
1 cubic yd of a concrete mixture contains about 500 hundred lbs of cement
260 kg/cu m
What you need to do first is to check if you have that room near the threshold of the door for that extra concrete(which is minimum of 3.5" inches) then you need to remove the top surface of the old concrete to be rough surface don't break too much just about an 1"wash clean and let it dry and only then to install the new concrete.
How much cement sand and stone do you need for 1 cubic meter of concre
1 and half tons
About 18lbs!
18lbs
18lbs
18lbs is 8.2kg
Well assuming the depth of concrete is going to be 1 meter you will need 846 cubic meters of concrete.
18lbs.@2000RPM
1 cubic yd of a concrete mixture contains about 500 hundred lbs of cement
It depends how thick you want it
For a 4-inch depth you will need at least 7 cubic yards.
You will need at least 14 cubic yards.
Mass is: M=V x d.To calculate the mass you need to know the density of this concrete and also the volume.